second type I K homology (KH) RNA-binding domain found in heterogeneous nuclear ribonucleoprotein K (hnRNP K) and similar proteins; hnRNP K, also called transformation up-regulated nuclear protein (TUNP), is a pre-mRNA binding protein that binds tenaciously to poly(C) sequences. It may be involved in the nuclear metabolism of hnRNAs, particularly for pre-mRNAs that contain cytidine-rich sequences. It can also bind poly(C) single-stranded DNA. hnRNP K plays an important role in p53/TP53 response to DNA damage, acting at the level of both transcription activation and repression. hnRNP K contains three K-homology (KH) RNA-binding domains. The model corresponds to the second one.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391065 120 DCELRLLIHQSLAGGIIGVKGAKIKELRENTQTTIKLFQECCPHSTDRVVLIGGKPDRVVECIKIILDLI 189
Cdd:cd22433    1 DCELRLLVHQSQAGCIIGRAGFKIKELREKTGATIKVYSECCPRSTDRVVQIGGKPDKVVECIREILELL 70

ROKNT (NUC014) domain; This presumed domain is found at the N-terminus of RNP K-like proteins that also contains KH domains pfam00013.

                          10        20        30        40
                  ....*....|....*....|....*....|....*....|
gi 530391065    4 EQPEETFPNTETNGefgKRPAEDMEEEQAFKRSRNTDEMV 43
Cdd:pfam08067   3 QQEEETFSNTESNG---KRPAEDMEEEQAFKRSRNSDEMV 39

second type I K homology (KH) RNA-binding domain found in heterogeneous nuclear ribonucleoprotein K (hnRNP K) and similar proteins; hnRNP K, also called transformation up-regulated nuclear protein (TUNP), is a pre-mRNA binding protein that binds tenaciously to poly(C) sequences. It may be involved in the nuclear metabolism of hnRNAs, particularly for pre-mRNAs that contain cytidine-rich sequences. It can also bind poly(C) single-stranded DNA. hnRNP K plays an important role in p53/TP53 response to DNA damage, acting at the level of both transcription activation and repression. hnRNP K contains three K-homology (KH) RNA-binding domains. The model corresponds to the second one.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391065 120 DCELRLLIHQSLAGGIIGVKGAKIKELRENTQTTIKLFQECCPHSTDRVVLIGGKPDRVVECIKIILDLI 189
Cdd:cd22433    1 DCELRLLVHQSQAGCIIGRAGFKIKELREKTGATIKVYSECCPRSTDRVVQIGGKPDKVVECIREILELL 70

KH domain; KH motifs bind RNA in vitro. Autoantibodies to Nova, a KH domain protein, cause paraneoplastic opsoclonus ataxia.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 530391065  365 TTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEGSEDRIITITGTQDQIQNAQYLLQN 429
Cdd:pfam00013   1 TVEILVPSSLVGLIIGKGGSNIKEIREETGAKIQIPPSESEGNERIVTITGTPEAVEAAKALIEE 65

K homology RNA-binding domain;

                           10        20        30        40        50        60
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 530391065   364 ITTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPleGSEDRIITITGTQDQIQNAQYLLQNSV 431
Cdd:smart00322   3 VTIEVLIPADKVGLIIGKGGSTIKKIEEETGVKIDIPGP--GSEERVVEITGPPENVEKAAELILEIL 68

K homology RNA-binding domain;

                           10        20        30        40        50        60        70
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391065   120 DCELRLLIHQSLAGGIIGVKGAKIKELRENTQTTIKLFQeccPHSTDRVVLIGGKPDRVVECIKIILDLI 189
Cdd:smart00322   2 PVTIEVLIPADKVGLIIGKGGSTIKKIEEETGVKIDIPG---PGSEERVVEITGPPENVEKAAELILEIL 68

KH domain; KH motifs bind RNA in vitro. Autoantibodies to Nova, a KH domain protein, cause paraneoplastic opsoclonus ataxia.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 530391065   44 ELRILLQSKNAGAVIGKGGKNIKALRTDYNASVSVPDSS--GPERILSISADIETIGEILKKII 105
Cdd:pfam00013   1 TVEILVPSSLVGLIIGKGGSNIKEIREETGAKIQIPPSEseGNERIVTITGTPEAVEAAKALIE 64

polynucleotide phosphorylase/polyadenylase; Provisional

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391065  55 GAVIGKGGKNIKALRTDYNASVSVPD--------SSGP------ERILSISADIEtIGEIL----KKIIP 106
Cdd:PRK11824 566 RDVIGPGGKTIREITEETGAKIDIEDdgtvkiaaTDGEaaeaakERIEGITAEPE-VGEIYegkvVRIVD 634

second type I K homology (KH) RNA-binding domain found in heterogeneous nuclear ribonucleoprotein K (hnRNP K) and similar proteins; hnRNP K, also called transformation up-regulated nuclear protein (TUNP), is a pre-mRNA binding protein that binds tenaciously to poly(C) sequences. It may be involved in the nuclear metabolism of hnRNAs, particularly for pre-mRNAs that contain cytidine-rich sequences. It can also bind poly(C) single-stranded DNA. hnRNP K plays an important role in p53/TP53 response to DNA damage, acting at the level of both transcription activation and repression. hnRNP K contains three K-homology (KH) RNA-binding domains. The model corresponds to the second one.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391065 120 DCELRLLIHQSLAGGIIGVKGAKIKELRENTQTTIKLFQECCPHSTDRVVLIGGKPDRVVECIKIILDLI 189
Cdd:cd22433    1 DCELRLLVHQSQAGCIIGRAGFKIKELREKTGATIKVYSECCPRSTDRVVQIGGKPDKVVECIREILELL 70

third type I K homology (KH) RNA-binding domain found in the family of poly(C)-binding proteins (PCBPs); The PCBP family, also known as hnRNP E family, comprises four members, PCBP1-4, which are RNA-binding proteins that interact in a sequence-specific manner with single-stranded poly(C) sequences. They are mainly involved in various posttranscriptional regulations, including mRNA stabilization or translational activation/silencing. Besides, PCBPs may share iron chaperone activity. PCBPs contain three K-homology (KH) RNA-binding domains. The model corresponds to the third one.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 530391065 363 IITTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEGSEDRIITITGTQDQIQNAQYLL 427
Cdd:cd22439    1 QTTQEITIPNDLIGCIIGKGGTKINEIRQLSGATIKIANSEDGSTERSVTITGTPEAVSLAQYLI 65

K homology (KH) RNA-binding domain, type I; KH binds single-stranded RNA or DNA. It is found in a wide variety of proteins including ribosomal proteins, transcription factors and post-transcriptional modifiers of mRNA. There are two different KH domains that belong to different protein folds, but they share a single KH motif. The KH motif is folded into a beta alpha alpha beta unit. In addition to the core, type II KH domains (e.g. ribosomal protein S3) include an N-terminal extension and type I KH domains (e.g. hnRNP K) contain a C-terminal extension. Some KH-I superfamily members contain a divergent KH domain that lacks the RNA-binding GXXG motif. Some others have a mutated GXXG motif which may or may not have nucleic acid binding ability.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 530391065 367 QVTIPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEGSEDRIITITGTQDQIQNAQYLLQ 428
Cdd:cd00105    2 EIEVPSELVGLIIGKGGSTIKEIEEETGARIQIPKEGEGSGERVVTITGTPEAVEKAKELIE 63

third type I K homology (KH) RNA-binding domain found in poly(rC)-binding protein 3 (PCBP3) and similar proteins; PCBP3, also called alpha-CP3, or PCBP3-overlapping transcript, or PCBP3-overlapping transcript 1, or heterogeneous nuclear ribonucleoprotein E3, or hnRNP E3, is a single-stranded nucleic acid binding protein that binds preferentially to oligo dC. It can function as a repressor dependent on binding to single-strand and double-stranded poly(C) sequences. PCBP3 contains three K-homology (KH) RNA-binding domains. The model corresponds to the third one.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 530391065 358 DLGGPIITTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEGSEDRIITITGTQDQIQNAQYLLQNS 430
Cdd:cd22522    3 DASPPASTHELTIPNDLIGCIIGRQGTKINEIRQMSGAQIKIANATEGSSERQITITGSPANISLAQYLINAR 75

ROKNT (NUC014) domain; This presumed domain is found at the N-terminus of RNP K-like proteins that also contains KH domains pfam00013.

                          10        20        30        40
                  ....*....|....*....|....*....|....*....|
gi 530391065    4 EQPEETFPNTETNGefgKRPAEDMEEEQAFKRSRNTDEMV 43
Cdd:pfam08067   3 QQEEETFSNTESNG---KRPAEDMEEEQAFKRSRNSDEMV 39

fifth type I K homology (KH) RNA-binding domain found in Arabidopsis thaliana KH domain-containing protein HEN4 and similar protein; HEN4, also called protein HUA ENHANCER 4, plays a role in floral reproductive organ identity in the third whorl and floral determinacy specification by specifically promoting the processing of AGAMOUS (AG) pre-mRNA. It functions in association with HUA1 and HUA2. HEN4 contains five K-homology (KH) RNA-binding domains. The model corresponds to the KH5 domain of HEN4.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 530391065 366 TQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEGSEDRIITITGTQDQIQNAQYLLQ 428
Cdd:cd22462    1 IEILIPAHAVGSVIGRGGSNINQIREISGAKVEVLKPDSATGERIVLISGTPDQARHAQNLIE 63

third type I K homology (KH) RNA-binding domain found in Arabidopsis thaliana protein BTR1 and similar proteins; BTR1, also called Binding to ToMV RNA 1, is a negative regulator of tomato mosaic virus (ToMV) multiplication but has no effect on the multiplication of cucumber mosaic virus (CMV). BTR1 contains three K-homology (KH) RNA-binding domains. The model corresponds to the third one.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|.
gi 530391065 364 ITTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKI---DEPLEGSEDRIITITGTQDQIQNAQYLLQNSV 431
Cdd:cd22514    1 TSVTIGVPDEHIGAILGRGGRTINEIQQHSGARIKIsdrGDFVSGTRNRKVTITGPQDAVQMAQYLLEQKL 71

first type I K homology (KH) RNA-binding domain found in Arabidopsis thaliana RNA-binding KH domain-containing protein PEPPER and similar proteins; The family includes a group of plant RNA-binding KH domain-containing proteins, such as PEPPER, flowering locus K homology domain protein (FLK), RNA-binding KH domain-containing protein RCF3 and KH domain-containing protein HEN4. PEPPER regulates vegetative and gynoecium development. It acts as a positive regulator of the central floral repressor FLOWERING LOCUS C. In concert with HUA2, PEPPER antagonizes FLK by positively regulating FLC probably at transcriptional and post-transcriptional levels, and thus acts as a negative regulator of flowering. FLK, also called flowering locus KH domain protein, regulates positively flowering by repressing FLC expression and post-transcriptional modification. PEPPER and FLK contain three K-homology (KH) RNA-binding domains. RCF3, also called protein ENHANCED STRESS RESPONSE 1 (ESR1), or protein HIGH OSMOTIC STRESS GENE EXPRESSION 5 (HOS5), or protein REGULATOR OF CBF GENE EXPRESSION 3, or protein SHINY 1 (SHI1), acts as negative regulator of osmotic stress-induced gene expression. It is involved in the regulation of thermotolerance responses under heat stress. It functions as an upstream regulator of heat stress transcription factor (HSF) genes. HEN4, also called protein HUA ENHANCER 4, plays a role in floral reproductive organ identity in the third whorl and floral determinacy specification by specifically promoting the processing of AGAMOUS (AG) pre-mRNA. It functions in association with HUA1 and HUA2. RCF3 and HEN4 contain five KH RNA-binding domains. The model corresponds to the KH1 domain of PEPPER and FLK, as well as KH1 and KH3 domains of RCF3 and HEN4.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 530391065 370 IPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEGSEDRIITITGTQD 418
Cdd:cd22459    8 CPVSKAGSVIGKGGEIIKQLRQETGARIKVEDGVPGTEERVITISSSEA 56

third type I K homology (KH) RNA-binding domain found in poly(rC)-binding protein 4 (PCBP4) and similar proteins; PCBP4, also called alpha-CP4, or heterogeneous nuclear ribonucleoprotein E4, or hnRNP E4, is a single-stranded nucleic acid binding protein that binds preferentially to oligo dC. It regulates both basal and stress-induced p21 expression through binding p21 3'-UTR and modulating p21 mRNA stability. It also plays a role in the cell cycle and is implicated in lung tumor suppression. PCBP4 contains three K-homology (KH) RNA-binding domains. The model corresponds to the third one.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 530391065 370 IPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEGSEDRIITITGTQDQIQNAQYLL 427
Cdd:cd22523    8 IPNDLIGCVIGRQGSKISEIRQMSGAHIKIGNQTEGTSERHVTITGSPVSITLAQYLI 65

fifth type I K homology (KH) RNA-binding domain found in Arabidopsis thaliana RNA-binding KH domain-containing protein RCF3 and similar protein; RCF3, also called protein ENHANCED STRESS RESPONSE 1 (ESR1), or protein HIGH OSMOTIC STRESS GENE EXPRESSION 5 (HOS5), or protein REGULATOR OF CBF GENE EXPRESSION 3, or protein SHINY 1 (SHI1), acts as negative regulator of osmotic stress-induced gene expression. It is involved in the regulation of thermotolerance responses under heat stress. It functions as an upstream regulator of heat stress transcription factor (HSF) genes. HEN4, also called protein HUA ENHANCER 4, plays a role in floral reproductive organ identity in the third whorl and floral determinacy specification by specifically promoting the processing of AGAMOUS (AG) pre-mRNA. It functions in association with HUA1 and HUA2. RCF3 contains five K-homology (KH) RNA-binding domains. The model corresponds to the KH5 domain of RCF3.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 530391065 364 ITTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKI--DEPLEGSEDRIITITGTQDQIQNAQYLLQ 428
Cdd:cd22463    2 SKIEFQIPEAVVGLIIGKSGNTIKQISERSGAFVAIvqDRYPLEETQKILRISGTEEQLKRAQSLVE 68

type I K homology (KH) RNA-binding domain found in Mask family proteins; The Mask family includes Drosophila melanogaster ankyrin repeat and KH domain-containing protein Mask, and its mammalian homologues Mask1/ANKHD1 and Mask2/ANKRD17. Mask, also called multiple ankyrin repeat single KH domain-containing protein, is a large ankyrin repeat and KH domain-containing protein involved in Drosophila receptor tyrosine kinase signaling. It acts as a mediator of receptor tyrosine kinase (RTK) signaling and may act either downstream of MAPK or transduce signaling through a parallel branch of the RTK pathway. Mask is required for the development and organization of indirect flight muscle sarcomeres by regulating the formation of M line and H zone and the correct assembly of thick and thin filaments in the sarcomere. Mask1/ANKHD1, also called HIV-1 Vpr-binding ankyrin repeat protein, or multiple ankyrin repeats single KH domain, or Hmask, is highly expressed in various cancer tissues and is involved in cancer progression, including proliferation and invasion. Mask2/ANKRD17, also called ankyrin repeat protein 17, or gene trap ankyrin repeat protein (GTAR), or serologically defined breast cancer antigen NY-BR-16, is a ubiquitously expressed ankyrin factor essential for the vascular integrity during embryogenesis. It may be directly involved in the DNA replication process and play pivotal roles in cell cycle and DNA regulation. It is also involved in innate immune defense against bacteria and viruses.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 530391065 368 VTIPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEGSEDRIITITGTQDQIQNAQYLLQNSVK 432
Cdd:cd22404    5 VTVPNSAISRVIGRGGCNINAIREVSGAHIEIDKQKGEQGDRRITIKGSADATRQAAQLINALIK 69

second type I K homology (KH) RNA-binding domain found in tudor and KH domain-containing protein (TDRKH) and similar proteins; TDRKH, also called tudor domain-containing protein 2 (TDRD2), is a mitochondria-anchored RNA-binding protein that is required for spermatogenesis and involved in piRNA biogenesis. It specifically recruits MIWI, but not MILI, to engage the piRNA pathway. TDRKH contains two K-homology (KH) RNA-binding domains and one tudor domain, which are involved in binding to RNA or single-strand DNA. The model corresponds to the second one.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 530391065 363 IITTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEGSED--RIITITGTQDQIQNAQYLLQNSVKQ 433
Cdd:cd22429    1 IITEELHVPQRAVGRIIGRGGETIRSICRTSGAKVKCDRESDDTLDlvRLITITGTKKEVDAAKSLILEKVSE 73

second type I K homology (KH) RNA-binding domain found in the family of poly(C)-binding proteins (PCBPs); The PCBP family, also known as hnRNP E family, comprises four members, PCBP1-4, which are RNA-binding proteins that interact in a sequence-specific manner with single-stranded poly(C) sequences. They are mainly involved in various posttranscriptional regulations, including mRNA stabilization or translational activation/silencing. Besides, PCBPs may share iron chaperone activity. PCBPs contain three K-homology (KH) RNA-binding domains. The model corresponds to the second one.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 530391065 364 ITTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKI-DEPLEGSEDRIITITGTQDQIQNAQYLL 427
Cdd:cd02396    2 ITLRLLVPASQCGSLIGKGGSKIKEIRESTGASVQVaSEMLPNSTERAVTISGSPEAITKCVEQI 66

first type I K homology (KH) RNA-binding domain found in the family of poly(C)-binding proteins (PCBPs); The PCBP family, also known as hnRNP E family, comprises four members, PCBP1-4, which are RNA-binding proteins that interact in a sequence-specific manner with single-stranded poly(C) sequences. They are mainly involved in various posttranscriptional regulations, including mRNA stabilization or translational activation/silencing. Besides, PCBPs may share iron chaperone activity. PCBPs contain three K-homology (KH) RNA-binding domains. The model corresponds to the first one.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 530391065  45 LRILLQSKNAGAVIGKGGKNIKALRTDYNASVSVPDSSGPERILSISADIETIGEILKKIIPTLEEY 111
Cdd:cd22438    1 IRMLMQGKEVGSIIGKKGETIKKFREESGARINISDGSCPERIVTVTGTTDAVFKAFELICRKLEED 67

third type I K homology (KH) RNA-binding domain found in the FUBP family RNA/DNA-binding proteins; The far upstream element-binding protein (FUBP) family includes FUBP1-3. FUBP1, also called FBP, or FUSE-binding protein 1, or DNA helicase V, or DH V, binds RNA and single-stranded DNA (ssDNA) and may act both as activator and repressor of transcription. It regulates MYC expression by binding to a single-stranded far-upstream element (FUSE) upstream of the MYC promoter. FUBP2, also called FUSE-binding protein 2, or KH type-splicing regulatory protein (KSRP), or p75, is a single-strand nucleic acid binding protein implicated in a variety of cellular processes, including splicing in the nucleus, mRNA decay, maturation of miRNA, and transcriptional control of proto-oncogenes such as c-myc. It regulates the stability and/or translatability of many mRNA species, encoding immune-relevant proteins, either by binding to AU-rich elements (AREs) of mRNA 3'UTR or by facilitating miRNA biogenesis to target mRNA. FUBP3, also called FUSE-binding protein 3, or MARTA2, was previously shown to mediate dendritic targeting of MAP2 mRNA in neurons. It may interact with single-stranded DNA from the far-upstream element (FUSE) and activate gene expression. It is required for beta-actin mRNA localization. It also interacts with fibroblast growth factor 9 (FGF9) 3'-UTR UG repeats and positively controls FGF9 expression through increasing translation of FGF9 mRNA. FUBP proteins contain four K-homology (KH) RNA-binding domains. The model corresponds to the third one.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 530391065 366 TQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEGSEDRIITITGTQDQIQNA 423
Cdd:cd22398    2 MEVPVPRFAVGVVIGKGGEMIKKIQNETGARVQFKPDDGNSPDRICVITGPPDQVQHA 59

fourth type I K homology (KH) RNA-binding domain found in the FUBP family RNA/DNA-binding proteins; The far upstream element-binding protein (FUBP) family includes FUBP1-3. FUBP1, also called FBP, or FUSE-binding protein 1, or DNA helicase V, or DH V, binds RNA and single-stranded DNA (ssDNA) and may act both as activator and repressor of transcription. It regulates MYC expression by binding to a single-stranded far-upstream element (FUSE) upstream of the MYC promoter. FUBP2, also called FUSE-binding protein 2, or KH type-splicing regulatory protein (KSRP), or p75, is a single-strand nucleic acid binding protein implicated in a variety of cellular processes, including splicing in the nucleus, mRNA decay, maturation of miRNA, and transcriptional control of proto-oncogenes such as c-myc. It regulates the stability and/or translatability of many mRNA species, encoding immune-relevant proteins, either by binding to AU-rich elements (AREs) of mRNA 3'UTR or by facilitating miRNA biogenesis to target mRNA. FUBP3, also called FUSE-binding protein 3, or MARTA2, was previously shown to mediate dendritic targeting of MAP2 mRNA in neurons. It may interact with single-stranded DNA from the far-upstream element (FUSE) and activate gene expression. It is required for beta-actin mRNA localization. It also interacts with fibroblast growth factor 9 (FGF9) 3'-UTR UG repeats and positively controls FGF9 expression through increasing translation of FGF9 mRNA. FUBP proteins contain four K-homology (KH) RNA-binding domains. The model corresponds to the fourth one.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 530391065 365 TTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKID--EPLEGSEdRIITITGTQDQIQNAQYLLQ 428
Cdd:cd22399    1 EVTFLVPANKCGLVIGKGGETIRQINQQSGAHVELDrnPPPNPNE-KLFIIRGNPQQIEHAKQLIR 65

second type I K homology (KH) RNA-binding domain found in Arabidopsis thaliana RNA-binding KH domain-containing protein PEPPER and similar proteins; The family includes a group of plant RNA-binding KH domain-containing proteins, such as PEPPER, flowering locus K homology domain protein (FLK), RNA-binding KH domain-containing protein RCF3 and KH domain-containing protein HEN4. PEPPER regulates vegetative and gynoecium development. It acts as a positive regulator of the central floral repressor FLOWERING LOCUS C. In concert with HUA2, PEPPER antagonizes FLK by positively regulating FLC probably at transcriptional and post-transcriptional levels, and thus acts as a negative regulator of flowering. FLK, also called flowering locus KH domain protein, regulates positively flowering by repressing FLC expression and post-transcriptional modification. PEPPER and FLK contain three K-homology (KH) RNA-binding domains. RCF3, also called protein ENHANCED STRESS RESPONSE 1 (ESR1), or protein HIGH OSMOTIC STRESS GENE EXPRESSION 5 (HOS5), or protein REGULATOR OF CBF GENE EXPRESSION 3, or protein SHINY 1 (SHI1), acts as negative regulator of osmotic stress-induced gene expression. It is involved in the regulation of thermotolerance responses under heat stress. It functions as an upstream regulator of heat stress transcription factor (HSF) genes. HEN4, also called protein HUA ENHANCER 4, plays a role in floral reproductive organ identity in the third whorl and floral determinacy specification by specifically promoting the processing of AGAMOUS (AG) pre-mRNA. It functions in association with HUA1 and HUA2. RCF3 and HEN4 contain five KH RNA-binding domains. The model corresponds to the KH2 domain of PEPPER and FLK, as well as KH2 and KH4 domains of RCF3 and HEN4.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391065 124 RLLIHQSLAGGIIGVKGAKIKELRENTQTTIK-LFQEC---CPHSTDRVVLIGGKPDRVVECIKIILDLI 189
Cdd:cd22460    3 RLLVASSQAGSLIGKGGAIIKQIREESGASVRiLPEEElppCASPDDRVVQISGEAQAVKKALELVSSRL 72

second type I K homology (KH) RNA-binding domain found in Arabidopsis thaliana RNA-binding KH domain-containing protein PEPPER and similar proteins; The family includes a group of plant RNA-binding KH domain-containing proteins, such as PEPPER, flowering locus K homology domain protein (FLK), RNA-binding KH domain-containing protein RCF3 and KH domain-containing protein HEN4. PEPPER regulates vegetative and gynoecium development. It acts as a positive regulator of the central floral repressor FLOWERING LOCUS C. In concert with HUA2, PEPPER antagonizes FLK by positively regulating FLC probably at transcriptional and post-transcriptional levels, and thus acts as a negative regulator of flowering. FLK, also called flowering locus KH domain protein, regulates positively flowering by repressing FLC expression and post-transcriptional modification. PEPPER and FLK contain three K-homology (KH) RNA-binding domains. RCF3, also called protein ENHANCED STRESS RESPONSE 1 (ESR1), or protein HIGH OSMOTIC STRESS GENE EXPRESSION 5 (HOS5), or protein REGULATOR OF CBF GENE EXPRESSION 3, or protein SHINY 1 (SHI1), acts as negative regulator of osmotic stress-induced gene expression. It is involved in the regulation of thermotolerance responses under heat stress. It functions as an upstream regulator of heat stress transcription factor (HSF) genes. HEN4, also called protein HUA ENHANCER 4, plays a role in floral reproductive organ identity in the third whorl and floral determinacy specification by specifically promoting the processing of AGAMOUS (AG) pre-mRNA. It functions in association with HUA1 and HUA2. RCF3 and HEN4 contain five KH RNA-binding domains. The model corresponds to the KH2 domain of PEPPER and FLK, as well as KH2 and KH4 domains of RCF3 and HEN4.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 530391065 370 IPKDLAGSIIGKGGQRIKQIRHESGASIKI---DEPLEG--SEDRIITITGTQDQIQNAQYLL 427
Cdd:cd22460    6 VASSQAGSLIGKGGAIIKQIREESGASVRIlpeEELPPCasPDDRVVQISGEAQAVKKALELV 68

first type I K homology (KH) RNA-binding domain found in the family of neuro-oncological ventral antigen (Nova); The family includes two related neuronal RNA-binding proteins, Nova-1 and Nova-2. Nova-1, also called onconeural ventral antigen 1, or paraneoplastic Ri antigen, or ventral neuron-specific protein 1, may regulate RNA splicing or metabolism in a specific subset of developing neurons. It interacts with RNA containing repeats of the YCAY sequence. It is a brain-enriched splicing factor regulating neuronal alternative splicing. Nova-1 is involved in neurological disorders and carcinogenesis. Nova-2, also called astrocytic NOVA1-like RNA-binding protein, is a neuronal RNA-binding protein expressed in a broader central nervous system (CNS) distribution than Nova-1. It functions in neuronal RNA metabolism. NOVA family proteins contain three K-homology (KH) RNA-binding domains. The model corresponds to the first one.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|.
gi 530391065 121 CELRLLIHQSLAGGIIGVKGAKIKELRENTQTTIKLFQ--ECCPHSTDRVVLIGGKPDRVVECIKIILDLI 189
Cdd:cd22435    2 CSLKLLVPNYAAGSIIGKGGQTIAQLQKETGARIKLSKnnDFYPGTTERVCLIQGEVEAVNAVLDFILEKI 72

second type I K homology (KH) RNA-binding domain found in poly(rC)-binding protein 1 (PCBP1) and similar proteins; The family includes PCBP1 (also called alpha-CP1, or heterogeneous nuclear ribonucleoprotein E1, or hnRNP E1, or nucleic acid-binding protein SUB2.3) and PCBP2 (also called alpha-CP2, or heterogeneous nuclear ribonucleoprotein E2, or hnRNP E2). They are single-stranded nucleic acid binding proteins that bind preferentially to oligo dC. They act as iron chaperones for ferritin. In case of infection by poliovirus, PCBP1 plays a role in initiation of viral RNA replication in concert with the viral protein 3CD. PCBP2 is a major cellular poly(rC)-binding protein. It also binds poly(rU). PCBP2 negatively regulates cellular antiviral responses mediated by MAVS signaling. It acts as an adapter between MAVS and the E3 ubiquitin ligase ITCH, therefore triggering MAVS ubiquitination and degradation. PCBP2 forms a metabolon with the heme oxygenase 1/cytochrome P450 reductase complex for heme catabolism and iron transfer. Both PCBP1 and PCBP2 contain three K-homology (KH) RNA-binding domains. The model corresponds to the second one.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391065 123 LRLLIHQSLAGGIIGVKGAKIKELRENTQTTIKLFQECCPHSTDRVVLIGGKPDRVVECIKIILDLISES 192
Cdd:cd22518    9 LRLVVPASQCGSLIGKGGCKIKEIRESTGAQVQVAGDMLPNSTERAITIAGIPQSIIECVKQICVVMLES 78

third type I K homology (KH) RNA-binding domain found in Arabidopsis thaliana RNA-binding KH domain-containing protein PEPPER and similar proteins; The family includes a group of plant RNA-binding KH domain-containing proteins, such as PEPPER and flowering locus K homology domain protein (FLK). PEPPER regulates vegetative and gynoecium development. It acts as a positive regulator of the central floral repressor FLOWERING LOCUS C. In concert with HUA2, PEPPER antagonizes FLK by positively regulating FLC probably at transcriptional and post-transcriptional levels, and thus acts as a negative regulator of flowering. FLK, also called flowering locus KH domain protein, regulates positively flowering by repressing FLC expression and post-transcriptional modification. PEPPER and FLK contain three K-homology (KH) RNA-binding domains. The model corresponds to the KH3 domain of PEPPER and FLK.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 530391065 364 ITTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEGSEDRIITITGTQDQIQNAQYLLQN 429
Cdd:cd22461    2 VSQQMQIPLSYADAIIGTAGANISYIRRTSGATITIQETRGAPGEMTVEIHGTQSQVQTAQQLIQN 67

type I K homology (KH) RNA-binding domain found in Drosophila melanogaster eukaryotic translation initiation factor 4E-binding protein Mextli and similar proteins; Mextli is a novel eukaryotic translation initiation factor 4E-binding protein that promotes translation in Drosophila melanogaster.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 530391065 364 ITTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEGSEDRIITITGTQDQIQNAQYLLQNSV 431
Cdd:cd22454    4 TTIEVVIPNADVGKVIGKGGETIKRIEALTDTVITFERVNGGSPNREVQITGSPDNVAAAKRLIEDTI 71

second type I K homology (KH) RNA-binding domain found in heterogeneous nuclear ribonucleoprotein K (hnRNP K) and similar proteins; hnRNP K, also called transformation up-regulated nuclear protein (TUNP), is a pre-mRNA binding protein that binds tenaciously to poly(C) sequences. It may be involved in the nuclear metabolism of hnRNAs, particularly for pre-mRNAs that contain cytidine-rich sequences. It can also bind poly(C) single-stranded DNA. hnRNP K plays an important role in p53/TP53 response to DNA damage, acting at the level of both transcription activation and repression. hnRNP K contains three K-homology (KH) RNA-binding domains. The model corresponds to the second one.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|.
gi 530391065 374 LAGSIIGKGGQRIKQIRHESGASIKI-DEPLEGSEDRIITITGTQDQIQNA 423
Cdd:cd22433   12 QAGCIIGRAGFKIKELREKTGATIKVySECCPRSTDRVVQIGGKPDKVVEC 62

type I K homology (KH) RNA-binding domain found in Saccharomyces cerevisiae meiotic recombination 1 protein (MER1) and similar proteins; MER1 is required for chromosome pairing and genetic recombination. It may function to bring the axial elements of the synaptonemal complex corresponding to homologous chromosomes together by initiating recombination. MER1 might be responsible for regulating the MER2 gene and/or gene product.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391065 364 ITTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKIdEPLEGSEDRIITITGTQDQIQNA 423
Cdd:cd22458    1 VTWEIKLPQALCGRLIGAKGKNIKALSEKSGASIRL-IPISNSSQQTIHLSGTDKQIALA 59

second type I K homology (KH) RNA-binding domain found in the family of neuro-oncological ventral antigen (Nova); The family includes two related neuronal RNA-binding proteins, Nova-1 and Nova-2. Nova-1, also called onconeural ventral antigen 1, or paraneoplastic Ri antigen, or ventral neuron-specific protein 1, may regulate RNA splicing or metabolism in a specific subset of developing neurons. It interacts with RNA containing repeats of the YCAY sequence. It is a brain-enriched splicing factor regulating neuronal alternative splicing. Nova-1 is involved in neurological disorders and carcinogenesis. Nova-2, also called astrocytic NOVA1-like RNA-binding protein, is a neuronal RNA-binding protein expressed in a broader central nervous system (CNS) distribution than Nova-1. It functions in neuronal RNA metabolism. NOVA family proteins contain three K-homology (KH) RNA-binding domains. The model corresponds to the second one.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 530391065 366 TQVTI--PKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEG--SEDRIITITGTQDQIQNA 423
Cdd:cd22436    1 KQVKIlvPNSTAGMIIGKGGATIKAIMEQSGARVQISQKPESinLQERVVTVTGEPEANRKA 62

first type I K homology (KH) RNA-binding domain found in the insulin-like growth factor 2 mRNA-binding protein (IGF2BP) family; The IGF2BP family includes three members: IGF2BP1/IMP-1/ CRD-BP/ VICKZ1, IGF2BP2/IMP-2/ VICKZ2, and IGF2BP3/IMP-3/VICKZ3, which are RNA-binding factors that recruit target transcripts to cytoplasmic protein-RNA complexes (mRNPs). They function by binding to the 5' UTR of the insulin-like growth factor 2 (IGF2) mRNA and regulating IGF2 translation. IGF2BP proteins contain four K-homology (KH) RNA-binding domains which are important in RNA binding and are known to be involved in RNA synthesis and metabolism. The model corresponds to the first one.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*
gi 530391065 370 IPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLE-GSEDRIITITGTQDQIQNA 423
Cdd:cd22400    6 VPSEFVGAIIGKGGATIRQITQQTGARIDIHRKENaGAAEKAITIYGTPEGCSSA 60

KH domain; KH motifs bind RNA in vitro. Autoantibodies to Nova, a KH domain protein, cause paraneoplastic opsoclonus ataxia.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 530391065   44 ELRILLQSKNAGAVIGKGGKNIKALRTDYNASVSVPDSS--GPERILSISADIETIGEILKKII 105
Cdd:pfam00013   1 TVEILVPSSLVGLIIGKGGSNIKEIREETGAKIQIPPSEseGNERIVTITGTPEAVEAAKALIE 64

first type I K homology (KH) RNA-binding domain found in far upstream element-binding protein 2 (FUBP2) and similar proteins; FUBP2, also called FUSE-binding protein 2, or KH type-splicing regulatory protein (KSRP), or p75, is a single-strand nucleic acid binding protein implicated in a variety of cellular processes, including splicing in the nucleus, mRNA decay, maturation of miRNA, and transcriptional control of proto-oncogenes such as c-myc. It regulates the stability and/or translatability of many mRNA species, encoding immune-relevant proteins, either by binding to AU-rich elements (AREs) of mRNA 3'UTR or by facilitating miRNA biogenesis to target mRNA. FUBP2 contains four K-homology (KH) RNA-binding domains. The model corresponds to the first one.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391065 364 ITTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEGSEDRIITITGTQDQIQNAQYLLQNSVKQ 433
Cdd:cd22479    1 MTEEYRVPDGMVGLIIGRGGEQINKIQQDSGCKVQISPDSGGLPERSVSLTGSPEAVQKAKMMLDDIVSR 70

second type I K homology (KH) RNA-binding domain found in poly(rC)-binding protein 3 (PCBP3) and similar proteins; PCBP3, also called alpha-CP3, or PCBP3-overlapping transcript, or PCBP3-overlapping transcript 1, or heterogeneous nuclear ribonucleoprotein E3, or hnRNP E3, is a single-stranded nucleic acid binding protein that binds preferentially to oligo dC. It can function as a repressor dependent on binding to single-strand and double-stranded poly(C) sequences. PCBP3 contains three K-homology (KH) RNA-binding domains. The model corresponds to the second one.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391065 362 PIITTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKI-DEPLEGSEDRIITITGTQDQI 420
Cdd:cd22519    4 PPVTLRLVVPASQCGSLIGKGGSKIKEIRESTGAQVQVaGDMLPNSTERAVTISGTPDAI 63

K homology (KH) RNA-binding domain, type I; KH binds single-stranded RNA or DNA. It is found in a wide variety of proteins including ribosomal proteins, transcription factors and post-transcriptional modifiers of mRNA. There are two different KH domains that belong to different protein folds, but they share a single KH motif. The KH motif is folded into a beta alpha alpha beta unit. In addition to the core, type II KH domains (e.g. ribosomal protein S3) include an N-terminal extension and type I KH domains (e.g. hnRNP K) contain a C-terminal extension. Some KH-I superfamily members contain a divergent KH domain that lacks the RNA-binding GXXG motif. Some others have a mutated GXXG motif which may or may not have nucleic acid binding ability.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 530391065 123 LRLLIHQSLAGGIIGVKGAKIKELRENTQTTIKLFQEcCPHSTDRVVLIGGKPDRVVECIKIIL 186
Cdd:cd00105    1 EEIEVPSELVGLIIGKGGSTIKEIEEETGARIQIPKE-GEGSGERVVTITGTPEAVEKAKELIE 63

second type I K homology (KH) RNA-binding domain found in the family of poly(C)-binding proteins (PCBPs); The PCBP family, also known as hnRNP E family, comprises four members, PCBP1-4, which are RNA-binding proteins that interact in a sequence-specific manner with single-stranded poly(C) sequences. They are mainly involved in various posttranscriptional regulations, including mRNA stabilization or translational activation/silencing. Besides, PCBPs may share iron chaperone activity. PCBPs contain three K-homology (KH) RNA-binding domains. The model corresponds to the second one.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 530391065  43 VELRILLQSKNAGAVIGKGGKNIKALRTDYNASVSV-----PDSSgpERILSISADIETIGEILKKI 104
Cdd:cd02396    2 ITLRLLVPASQCGSLIGKGGSKIKEIRESTGASVQVasemlPNST--ERAVTISGSPEAITKCVEQI 66

first type I K homology (KH) RNA-binding domain found in tudor and KH domain-containing protein (TDRKH) and similar proteins; TDRKH, also called tudor domain-containing protein 2 (TDRD2), is a mitochondria-anchored RNA-binding protein that is required for spermatogenesis and involved in piRNA biogenesis. It specifically recruits MIWI, but not MILI, to engage the piRNA pathway. TDRKH contains two K-homology (KH) RNA-binding domains and one tudor domain, which are involved in binding to RNA or single-strand DNA. The model corresponds to the first one.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 530391065 364 ITTQVTIPKDLAGSIIGKGGQRIKQIRHESGASIKIDEPLEGSE--DRIITITGTQDQIQNAQ 424
Cdd:cd22428    5 IEIEMKVPREAVGLIIGRQGATIKQIQKETGARIDFKDEGSGGElpERVLLIQGNPVQAQRAE 67

first type I K homology (KH) RNA-binding domain found in poly(rC)-binding protein 1 (PCBP1) and similar proteins; The family includes PCBP1 (also called alpha-CP1, or heterogeneous nuclear ribonucleoprotein E1, or hnRNP E1, or nucleic acid-binding protein SUB2.3) and PCBP2 (also called alpha-CP2, or heterogeneous nuclear ribonucleoprotein E2, or hnRNP E2). They are single-stranded nucleic acid binding proteins that bind preferentially to oligo dC. They act as iron chaperones for ferritin. In case of infection by poliovirus, PCBP1 plays a role in initiation of viral RNA replication in concert with the viral protein 3CD. PCBP2 is a major cellular poly(rC)-binding protein. It also binds poly(rU). PCBP2 negatively regulates cellular antiviral responses mediated by MAVS signaling. It acts as an adapter between MAVS and the E3 ubiquitin ligase ITCH, therefore triggering MAVS ubiquitination and degradation. PCBP2 forms a metabolon with the heme oxygenase 1/cytochrome P450 reductase complex for heme catabolism and iron transfer. Both PCBP1 and PCBP2 contain three K-homology (KH) RNA-binding domains. The model corresponds to the first one.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 530391065  45 LRILLQSKNAGAVIGKGGKNIKALRTDYNASVSVPDSSGPERILSISADIETIGEILKKIIPTLEE 110
Cdd:cd22515    4 IRLLMHGKEVGSIIGKKGESVKKMREESGARINISEGNCPERIITLAGPTNAIFKAFAMIIDKLEE 69

first type I K homology (KH) RNA-binding domain found in Arabidopsis thaliana RNA-binding KH domain-containing protein PEPPER and similar proteins; The family includes a group of plant RNA-binding KH domain-containing proteins, such as PEPPER, flowering locus K homology domain protein (FLK), RNA-binding KH domain-containing protein RCF3 and KH domain-containing protein HEN4. PEPPER regulates vegetative and gynoecium development. It acts as a positive regulator of the central floral repressor FLOWERING LOCUS C. In concert with HUA2, PEPPER antagonizes FLK by positively regulating FLC probably at transcriptional and post-transcriptional levels, and thus acts as a negative regulator of flowering. FLK, also called flowering locus KH domain protein, regulates positively flowering by repressing FLC expression and post-transcriptional modification. PEPPER and FLK contain three K-homology (KH) RNA-binding domains. RCF3, also called protein ENHANCED STRESS RESPONSE 1 (ESR1), or protein HIGH OSMOTIC STRESS GENE EXPRESSION 5 (HOS5), or protein REGULATOR OF CBF GENE EXPRESSION 3, or protein SHINY 1 (SHI1), acts as negative regulator of osmotic stress-induced gene expression. It is involved in the regulation of thermotolerance responses under heat stress. It functions as an upstream regulator of heat stress transcription factor (HSF) genes. HEN4, also called protein HUA ENHANCER 4, plays a role in floral reproductive organ identity in the third whorl and floral determinacy specification by specifically promoting the processing of AGAMOUS (AG) pre-mRNA. It functions in association with HUA1 and HUA2. RCF3 and HEN4 contain five KH RNA-binding domains. The model corresponds to the KH1 domain of PEPPER and FLK, as well as KH1 and KH3 domains of RCF3 and HEN4.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 530391065 120 DCELRLLIHQSLAGGIIGVKGAKIKELRENTQTTIKLfQECCPHSTDRVVLIGGKPDR 177
Cdd:cd22459    1 EVVFRLLCPVSKAGSVIGKGGEIIKQLRQETGARIKV-EDGVPGTEERVITISSSEAP 57