RNA recognition motif (RRM) found in alkylated DNA repair protein alkB homolog 8 (ALKBH8) and similar proteins; This subfamily corresponds to the RRM of ALKBH8, also termed alpha-ketoglutarate-dependent dioxygenase ABH8, or S-adenosyl-L-methionine-dependent tRNA methyltransferase ABH8, expressed in various types of human cancers. It is essential in urothelial carcinoma cell survival mediated by NOX-1-dependent ROS signals. ALKBH8 has also been identified as a tRNA methyltransferase that catalyzes methylation of tRNA to yield 5-methylcarboxymethyl uridine (mcm5U) at the wobble position of the anticodon loop. Thus, ALKBH8 plays a crucial role in the DNA damage survival pathway through a distinct mechanism involving the regulation of tRNA modification. ALKBH8 localizes to the cytoplasm. It contains the characteristic AlkB domain that is composed of a tRNA methyltransferase motif, a motif homologous to the bacterial AlkB DNA/RNA repair enzyme, and a dioxygenase catalytic core domain encompassing cofactor-binding sites for iron and 2-oxoglutarate. In addition, unlike other AlkB homologs, ALKBH8 contains an N-terminal RNA recognition motif (RRM), also termed RBD (RNA binding domain) or RNP (ribonucleoprotein domain), and a C-terminal S-adenosylmethionine (SAM)-dependent methyltransferase (MT) domain.

                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 12860708  42 TQSLVIANGGLGNGVSRKQLLLTLEKCGPVEALLMPPNKPYAFVIFQTIEESKKAYFTLNGKEiIDDLGQKIFLYLNFVE 121
Cdd:cd12431   1 TQHLVVANGGLGNGVSREQLLEVFEKYGTVEDIVMLPGKPYSFVSFKSVEEAAKAYNALNGKE-LELPQQNVPLYLSFVE 79

                .
gi 12860708 122 K 122
Cdd:cd12431  80 K 80

RNA recognition motif (RRM) found in alkylated DNA repair protein alkB homolog 8 (ALKBH8) and similar proteins; This subfamily corresponds to the RRM of ALKBH8, also termed alpha-ketoglutarate-dependent dioxygenase ABH8, or S-adenosyl-L-methionine-dependent tRNA methyltransferase ABH8, expressed in various types of human cancers. It is essential in urothelial carcinoma cell survival mediated by NOX-1-dependent ROS signals. ALKBH8 has also been identified as a tRNA methyltransferase that catalyzes methylation of tRNA to yield 5-methylcarboxymethyl uridine (mcm5U) at the wobble position of the anticodon loop. Thus, ALKBH8 plays a crucial role in the DNA damage survival pathway through a distinct mechanism involving the regulation of tRNA modification. ALKBH8 localizes to the cytoplasm. It contains the characteristic AlkB domain that is composed of a tRNA methyltransferase motif, a motif homologous to the bacterial AlkB DNA/RNA repair enzyme, and a dioxygenase catalytic core domain encompassing cofactor-binding sites for iron and 2-oxoglutarate. In addition, unlike other AlkB homologs, ALKBH8 contains an N-terminal RNA recognition motif (RRM), also termed RBD (RNA binding domain) or RNP (ribonucleoprotein domain), and a C-terminal S-adenosylmethionine (SAM)-dependent methyltransferase (MT) domain.

                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 12860708  42 TQSLVIANGGLGNGVSRKQLLLTLEKCGPVEALLMPPNKPYAFVIFQTIEESKKAYFTLNGKEiIDDLGQKIFLYLNFVE 121
Cdd:cd12431   1 TQHLVVANGGLGNGVSREQLLEVFEKYGTVEDIVMLPGKPYSFVSFKSVEEAAKAYNALNGKE-LELPQQNVPLYLSFVE 79

                .
gi 12860708 122 K 122
Cdd:cd12431  80 K 80

RNA recognition motif. (a.k.a. RRM, RBD, or RNP domain); The RRM motif is probably diagnostic of an RNA binding protein. RRMs are found in a variety of RNA binding proteins, including various hnRNP proteins, proteins implicated in regulation of alternative splicing, and protein components of snRNPs. The motif also appears in a few single stranded DNA binding proteins. The RRM structure consists of four strands and two helices arranged in an alpha/beta sandwich, with a third helix present during RNA binding in some cases The C-terminal beta strand (4th strand) and final helix are hard to align and have been omitted in the SEED alignment The LA proteins have an N terminal rrm which is included in the seed. There is a second region towards the C terminus that has some features characteriztic of a rrm but does not appear to have the important structural core of a rrm. The LA proteins are one of the main autoantigens in Systemic lupus erythematosus (SLE), an autoimmune disease.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 12860708    50 GGLGNGVSRKQLLLTLEKCGPVEALLMPP-----NKPYAFVIFQTIEESKKAYFTLNGKEI 105
Cdd:pfam00076   4 GNLPPDTTEEDLKDLFSKFGPIKSIRLVRdetgrSKGFAFVEFEDEEDAEKAIEALNGKEL 64

splicing factor, CC1-like family; This model represents a subfamily of RNA splicing factors including the Pad-1 protein (N. crassa), CAPER (M. musculus) and CC1.3 (H.sapiens). These proteins are characterized by an N-terminal arginine-rich, low complexity domain followed by three (or in the case of 4 H. sapiens paralogs, two) RNA recognition domains (rrm: pfam00706). These splicing factors are closely related to the U2AF splicing factor family (TIGR01642). A homologous gene from Plasmodium falciparum was identified in the course of the analysis of that genome at TIGR and was included in the seed.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 12860708     8 VLKLTKMEKKflRKQSKARHVLLKHEGiqavSYPTQSLVIanGGLGNGVSRKQLLLTLEKCGPVEA--LLMPPN----KP 81
Cdd:TIGR01622 186 IVQLSEAEKN--RAARAATETSGHHPN----SIPFHRLYV--GNLHFNITEQDLRQIFEPFGEIEFvqLQKDPEtgrsKG 257

                          90       100
                  ....*....|....*....|....
gi 12860708    82 YAFVIFQTIEESKKAYFTLNGKEI 105
Cdd:TIGR01622 258 YGFIQFRDAEQAKEALEKMNGFEL 281

RNA recognition motif (RRM) found in alkylated DNA repair protein alkB homolog 8 (ALKBH8) and similar proteins; This subfamily corresponds to the RRM of ALKBH8, also termed alpha-ketoglutarate-dependent dioxygenase ABH8, or S-adenosyl-L-methionine-dependent tRNA methyltransferase ABH8, expressed in various types of human cancers. It is essential in urothelial carcinoma cell survival mediated by NOX-1-dependent ROS signals. ALKBH8 has also been identified as a tRNA methyltransferase that catalyzes methylation of tRNA to yield 5-methylcarboxymethyl uridine (mcm5U) at the wobble position of the anticodon loop. Thus, ALKBH8 plays a crucial role in the DNA damage survival pathway through a distinct mechanism involving the regulation of tRNA modification. ALKBH8 localizes to the cytoplasm. It contains the characteristic AlkB domain that is composed of a tRNA methyltransferase motif, a motif homologous to the bacterial AlkB DNA/RNA repair enzyme, and a dioxygenase catalytic core domain encompassing cofactor-binding sites for iron and 2-oxoglutarate. In addition, unlike other AlkB homologs, ALKBH8 contains an N-terminal RNA recognition motif (RRM), also termed RBD (RNA binding domain) or RNP (ribonucleoprotein domain), and a C-terminal S-adenosylmethionine (SAM)-dependent methyltransferase (MT) domain.

                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 12860708  42 TQSLVIANGGLGNGVSRKQLLLTLEKCGPVEALLMPPNKPYAFVIFQTIEESKKAYFTLNGKEiIDDLGQKIFLYLNFVE 121
Cdd:cd12431   1 TQHLVVANGGLGNGVSREQLLEVFEKYGTVEDIVMLPGKPYSFVSFKSVEEAAKAYNALNGKE-LELPQQNVPLYLSFVE 79

                .
gi 12860708 122 K 122
Cdd:cd12431  80 K 80

RNA recognition motif. (a.k.a. RRM, RBD, or RNP domain); The RRM motif is probably diagnostic of an RNA binding protein. RRMs are found in a variety of RNA binding proteins, including various hnRNP proteins, proteins implicated in regulation of alternative splicing, and protein components of snRNPs. The motif also appears in a few single stranded DNA binding proteins. The RRM structure consists of four strands and two helices arranged in an alpha/beta sandwich, with a third helix present during RNA binding in some cases The C-terminal beta strand (4th strand) and final helix are hard to align and have been omitted in the SEED alignment The LA proteins have an N terminal rrm which is included in the seed. There is a second region towards the C terminus that has some features characteriztic of a rrm but does not appear to have the important structural core of a rrm. The LA proteins are one of the main autoantigens in Systemic lupus erythematosus (SLE), an autoimmune disease.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 12860708    50 GGLGNGVSRKQLLLTLEKCGPVEALLMPP-----NKPYAFVIFQTIEESKKAYFTLNGKEI 105
Cdd:pfam00076   4 GNLPPDTTEEDLKDLFSKFGPIKSIRLVRdetgrSKGFAFVEFEDEEDAEKAIEALNGKEL 64

RNA recognition motif (RRM) superfamily; RRM, also known as RBD (RNA binding domain) or RNP (ribonucleoprotein domain), is a highly abundant domain in eukaryotes found in proteins involved in post-transcriptional gene expression processes including mRNA and rRNA processing, RNA export, and RNA stability. This domain is 90 amino acids in length and consists of a four-stranded beta-sheet packed against two alpha-helices. RRM usually interacts with ssRNA, but is also known to interact with ssDNA as well as proteins. RRM binds a variable number of nucleotides, ranging from two to eight. The active site includes three aromatic side-chains located within the conserved RNP1 and RNP2 motifs of the domain. The RRM domain is found in a variety heterogeneous nuclear ribonucleoproteins (hnRNPs), proteins implicated in regulation of alternative splicing, and protein components of small nuclear ribonucleoproteins (snRNPs).

                        10        20        30        40        50        60
                ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 12860708  50 GGLGNGVSRKQLLLTLEKCGPVEALLMPPN-----KPYAFVIFQTIEESKKAYFTLNGKEI 105
Cdd:cd00590   4 GNLPPDTTEEDLRELFSKFGEVVSVRIVRDrdgksKGFAFVEFESPEDAEKALEALNGTEL 64

RNA recognition motif (RRM) found in eukaryotic RNA-binding protein 18 and similar proteins; This subfamily corresponds to the RRM of RBM18, a putative RNA-binding protein containing a well-conserved RNA recognition motif (RRM), also termed RBD (RNA binding domain) or RNP (ribonucleoprotein domain). The biological role of RBM18 remains unclear.

                        10        20        30        40        50        60        70
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....
gi 12860708  50 GGLGNGVSRKQLLLTLEKCGPVEALLMPPNK---------PYAFVIFQTIEESKKAYFTLNGKEIiddLGQKIF 114
Cdd:cd12355   5 GNLDPRLTEYHLLKLLSKYGKIKKFDFLFHKtgplkgqprGYCFVTFETKEEAEKAIECLNGKLA---LGKKLV 75

RNA recognition motif (RRM) found in fission yeast pre-mRNA-splicing factor Srp1p, Arabidopsis thaliana arginine/serine-rich-splicing factor RSp31 and similar proteins; This subfamily corresponds to the RRM of Srp1p and RRM2 of plant SR splicing factors. Srp1p is encoded by gene srp1 from fission yeast Schizosaccharomyces pombe. It plays a role in the pre-mRNA splicing process, but is not essential for growth. Srp1p is closely related to the SR protein family found in Metazoa. It contains an N-terminal RNA recognition motif (RRM), also termed RBD (RNA binding domain) or RNP (ribonucleoprotein domain), a glycine hinge and a RS domain in the middle, and a C-terminal domain. The family also includes a novel group of arginine/serine (RS) or serine/arginine (SR) splicing factors existing in plants, such as A. thaliana RSp31, RSp35, RSp41 and similar proteins. Like vertebrate RS splicing factors, these proteins function as plant splicing factors and play crucial roles in constitutive and alternative splicing in plants. They all contain two RRMs at their N-terminus and an RS domain at their C-terminus.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|..
gi 12860708  66 EKCGPVEALLMPpnKPYAFVIFQTIEESKKAYFTLNGKEIID 107
Cdd:cd12233  22 EPFGPLVRCDIR--KTFAFVEFEDSEDATKALEALHGSRIDG 61

RNA recognition motif 1 (RRM1) found in vertebrate heterogeneous nuclear ribonucleoprotein L-like (hnRNP-LL); This subgroup corresponds to the RRM1 of hnRNP-LL, which plays a critical and unique role in the signal-induced regulation of CD45 and acts as a global regulator of alternative splicing in activated T cells. It is closely related in domain structure and sequence to heterogeneous nuclear ribonucleoprotein L (hnRNP-L), which is an abundant nuclear, multifunctional RNA-binding protein with three RNA-recognition motifs (RRMs), also known as RBD (RNA binding domain) or RNP (ribonucleoprotein domain).

                        10        20        30        40        50        60        70
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....
gi 12860708  42 TQSLVIANGGLGNGVSRKQLLLTLEKCGPVEALLMPPNKPYAFVIFQTIEESKKAyFTLNGKEIIDDLGQKIFL 115
Cdd:cd12781   1 SVSPVVHVRGLCESVVEADLVEALEKFGTICYVMMMPFKRQALVEFENVESAKKC-VTFAADEPVYIAGQQAFF 73

RNA recognition motif 2 (RRM2) and 4 (RRM4) found in RNA-binding protein MRN1 and similar proteins; This subgroup corresponds to the RRM2 and RRM4 of MRN1, also termed multicopy suppressor of RSC-NHP6 synthetic lethality protein 1, or post-transcriptional regulator of 69 kDa, and is an RNA-binding protein found in yeast. Although its specific biological role remains unclear, MRN1 might be involved in translational regulation. Members in this family contain four copies of conserved RNA recognition motif (RRM), also known as RBD (RNA binding domain) or RNP (ribonucleoprotein domain).

                        10        20        30        40        50
                ....*....|....*....|....*....|....*....|....*....|....
gi 12860708  50 GGLGNGVSRKQLLLTLEKCGPVEALLMPPNKPYAFVIFQTIEESKKAYFTLNGK 103
Cdd:cd12262   9 GNLDDSLTEEEIRGILEKYGEIESIKILKEKNCAFVNYLNIANAIKAVQELPIK 62

RNA recognition motif 3 in fungal pre-messenger RNA splicing protein 24 (Prp24) and similar proteins; This subfamily corresponds to the RRM3 of Prp24, also termed U4/U6 snRNA-associated-splicing factor PRP24 (U4/U6 snRNP), an RNA-binding protein with four well conserved RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains). It facilitates U6 RNA base-pairing with U4 RNA during spliceosome assembly. Prp24 specifically binds free U6 RNA primarily with RRMs 1 and 2 and facilitates pairing of U6 RNA bases with U4 RNA bases. Additionally, it may also be involved in dissociation of the U4/U6 complex during spliceosome activation.

                        10        20        30        40        50
                ....*....|....*....|....*....|....*....|....*....|.
gi 12860708  66 EKCGPVEALLMPP---------NKPYAFVIFQTIEESKKAyFTLNGKEIID 107
Cdd:cd12298  22 EKFGEIESINIPKkqknrkgrhNNGFAFVTFEDADSAESA-LQLNGTLLDN 71

RNA recognition motif 1 (RRM1) found in tRNA selenocysteine-associated protein 1 (SECp43) and similar proteins; This subfamily corresponds to the RRM1 in tRNA selenocysteine-associated protein 1 (SECp43), yeast negative growth regulatory protein NGR1 (RBP1), yeast protein NAM8, and similar proteins. SECp43 is an RNA-binding protein associated specifically with eukaryotic selenocysteine tRNA [tRNA(Sec)]. It may play an adaptor role in the mechanism of selenocysteine insertion. SECp43 is located primarily in the nucleus and contains two N-terminal RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains), and a C-terminal polar/acidic region. Yeast proteins, NGR1 and NAM8, show high sequence similarity with SECp43. NGR1 is a putative glucose-repressible protein that binds both RNA and single-stranded DNA (ssDNA). It may function in regulating cell growth in early log phase, possibly through its participation in RNA metabolism. NGR1 contains three RRMs, two of which are followed by a glutamine-rich stretch that may be involved in transcriptional activity. In addition, NGR1 has an asparagine-rich region near the C-terminus which also harbors a methionine-rich region. NAM8 is a putative RNA-binding protein that acts as a suppressor of mitochondrial splicing deficiencies when overexpressed in yeast. It may be a non-essential component of the mitochondrial splicing machinery. NAM8 also contains three RRMs.

                        10        20        30
                ....*....|....*....|....*....|....*...
gi 12860708  82 YAFVIFQTIEESKKAYFTLNGKEIIddlGQKIFLYLNF 119
Cdd:cd12344  44 YCFVEFATQEAAEQALEHLNGKPIP---NTQQRFRLNW 78

RNA recognition motif 3 (RRM3) found in nucleolysin TIAR and similar proteins; This subgroup corresponds to the RRM3 of nucleolysin TIAR, also termed TIA-1-related protein, a cytotoxic granule-associated RNA-binding protein that shows high sequence similarity with 40-kDa isoform of T-cell-restricted intracellular antigen-1 (p40-TIA-1). TIAR is mainly localized in the nucleus of hematopoietic and nonhematopoietic cells. It is translocated from the nucleus to the cytoplasm in response to exogenous triggers of apoptosis. TIAR possesses nucleolytic activity against cytolytic lymphocyte (CTL) target cells. It can trigger DNA fragmentation in permeabilized thymocytes, and thus may function as an effector responsible for inducing apoptosis. TIAR is composed of three N-terminal highly homologous RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains), and a glutamine-rich C-terminal auxiliary domain containing a lysosome-targeting motif. It interacts with RNAs containing short stretches of uridylates and its RRM2 can mediate the specific binding to uridylate-rich RNAs.

                        10        20        30        40        50
                ....*....|....*....|....*....|....*....|....*....|....*.
gi 12860708  50 GGLGNGVSRKQLLLTLEKCGPVEALLMPPNKPYAFVIFQTIEESKKAYFTLNGKEI 105
Cdd:cd12620   6 GGIASGLTEQLMRQTFSPFGQIMEIRVFPEKGYSFVRFSTHESAAHAIVSVNGTTI 61