PHD finger 2 found in PHD finger protein 19 (PHF19); PHF19, also termed Polycomb-like protein 3 (PCL3), is a component of the Polycomb repressive complex 2 (PRC2), which is the major H3K27 methyltransferase that regulates pluripotency, differentiation, and tumorigenesis through catalysis of histone H3 lysine 27 trimethylation (H3K27me3) on chromatin. PHF19 consists of an N-terminal Tudor domain followed by two plant homeodomain (PHD) fingers, and a C-terminal MTF2 domain. It binds H3K36me3 through its Tudor domain and recruits the PRC2 complex and the H3K36me3 demethylase NO66 to embryonic stem cell genes during differentiation. Moreover, PHF19 and its upstream regulator, Akt, play roles in the phenotype switch of melanoma cells from proliferative to invasive states. This model corresponds to the second PHD finger.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 767956998 216 YCYCGGPGEWYLRMLQCYRCRQWFHEACTQCLNEPMMFGDRFYLFFCSVCNQ 267
Cdd:cd15581    1 YCYCGGPGEWYLKMLQCYRCRQWFHEACTQCLNDPMMFGDRFYLFFCAVCNQ 52

PHD finger 2 found in PHD finger protein 19 (PHF19); PHF19, also termed Polycomb-like protein 3 (PCL3), is a component of the Polycomb repressive complex 2 (PRC2), which is the major H3K27 methyltransferase that regulates pluripotency, differentiation, and tumorigenesis through catalysis of histone H3 lysine 27 trimethylation (H3K27me3) on chromatin. PHF19 consists of an N-terminal Tudor domain followed by two plant homeodomain (PHD) fingers, and a C-terminal MTF2 domain. It binds H3K36me3 through its Tudor domain and recruits the PRC2 complex and the H3K36me3 demethylase NO66 to embryonic stem cell genes during differentiation. Moreover, PHF19 and its upstream regulator, Akt, play roles in the phenotype switch of melanoma cells from proliferative to invasive states. This model corresponds to the second PHD finger.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 767956998 216 YCYCGGPGEWYLRMLQCYRCRQWFHEACTQCLNEPMMFGDRFYLFFCSVCNQ 267
Cdd:cd15581    1 YCYCGGPGEWYLKMLQCYRCRQWFHEACTQCLNDPMMFGDRFYLFFCAVCNQ 52

Jumonji domain-containing protein 2A Tudor domain; This is the tudor domain found in histone demethylase Jumonji domain-containing protein 2A (JMJD2A). Structure and function analysis indicate that this domain can recognize equally well two unrelated histone peptides, H3K4me3 and H4K20me3, by means of two very different binding mechanisms. JMJD2 also known as KDM4, is a conserved iron (II)-dependent jumonji-domain demethylase subfamily that is essential during development. Vertebrate KDM4A-C proteins contain a conserved double tudor domain (DTD).

                          10        20        30
                  ....*....|....*....|....*....|....*.
gi 767956998   62 GQYVLCRWTDGLYYLGKIKRVsSSKQSCLVTFEDNS 97
Cdd:pfam18104   1 GQDVIARWTDGRYYLGKFIGI-HTQTFYEVEFEDGS 35

PHD-finger; PHD folds into an interleaved type of Zn-finger chelating 2 Zn ions in a similar manner to that of the RING and FYVE domains. Several PHD fingers have been identified as binding modules of methylated histone H3.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|...
gi 767956998  118 CNICLGktSGPLNEILICGKCGLGYHQQCHIPiAGSADQPLLTPWFCRRCIFA 170
Cdd:pfam00628   2 CAVCGK--SDDGGELVQCDGCDDWFHLACLGP-PLDPAEIPSGEWLCPECKPK 51

PHD zinc finger; The plant homeodomain (PHD) finger is a C4HC3 zinc-finger-like motif found in nuclear proteins thought to be involved in epigenetics and chromatin-mediated transcriptional regulation. The PHD finger binds two zinc ions using the so-called 'cross-brace' motif and is thus structurally related to the RING finger and the FYVE finger. It is not yet known if PHD fingers have a common molecular function. Several reports suggest that it can function as a protein-protein interacton domain and it was recently demonstrated that the PHD finger of p300 can cooperate with the adjacent BROMO domain in nucleosome binding in vitro. Other reports suggesting that the PHD finger is a ubiquitin ligase have been refuted as these domains were RING fingers misidentified as PHD fingers.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|
gi 767956998   118 CNIClgKTSGPLNEILICGKCGLGYHQQCHIPIAGSADQPllTPWFCRRC 167
Cdd:smart00249   2 CSVC--GKPDDGGELLQCDGCDRWYHQTCLGPPLLEEEPD--GKWYCPKC 47

PHD finger 2 found in PHD finger protein 19 (PHF19); PHF19, also termed Polycomb-like protein 3 (PCL3), is a component of the Polycomb repressive complex 2 (PRC2), which is the major H3K27 methyltransferase that regulates pluripotency, differentiation, and tumorigenesis through catalysis of histone H3 lysine 27 trimethylation (H3K27me3) on chromatin. PHF19 consists of an N-terminal Tudor domain followed by two plant homeodomain (PHD) fingers, and a C-terminal MTF2 domain. It binds H3K36me3 through its Tudor domain and recruits the PRC2 complex and the H3K36me3 demethylase NO66 to embryonic stem cell genes during differentiation. Moreover, PHF19 and its upstream regulator, Akt, play roles in the phenotype switch of melanoma cells from proliferative to invasive states. This model corresponds to the second PHD finger.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 767956998 216 YCYCGGPGEWYLRMLQCYRCRQWFHEACTQCLNEPMMFGDRFYLFFCSVCNQ 267
Cdd:cd15581    1 YCYCGGPGEWYLKMLQCYRCRQWFHEACTQCLNDPMMFGDRFYLFFCAVCNQ 52

PHD finger 1 found in PHD finger protein 19 (PHF19); PHF19, also termed Polycomb-like protein 3 (PCL3), is a component of the polycomb repressive complex 2 (PRC2), which is the major H3K27 methyltransferase that regulates pluripotency, differentiation, and tumorigenesis through catalysis of histone H3 lysine 27 trimethylation (H3K27me3) on chromatin. PHF19 consists of an N-terminal Tudor domain followed by two PHD fingers, and a C-terminal MTF2 domain. It binds trimethylated histone H3 Lys36 (H3K36me3) through its Tudor domain and recruits the PRC2 complex and the H3K36me3 demethylase NO66 to embryonic stem cell genes during differentiation. Moreover, PHF19 and its upstream regulator, Akt, play roles in the phenotype switch of melanoma cells from proliferative to invasive states. This model corresponds to the first PHD finger.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 767956998 117 KCNICLGKTSGPLNEILICGKCGLGYHQQCHIPIAGSADQPLLTPWFCRRCIF 169
Cdd:cd15579    1 KCNVCLGKSSGPLNEILICGKCGLGYHQQCHIPVVDSSDDPPLTPWFCRRCIF 53

Tudor domain found in polycomb repressive complex 2 (PRC2)-associated polycomb-like (PCL) family proteins; The PCL family includes PHD finger protein1 (PHF1) and its homologs, metal-response element-binding transcription factor 2 (MTF2/PCL2) and PHF19/PCL3, which are accessory components of the Polycomb repressive complex 2 (PRC2) core complex. Members contain an N-terminal Tudor domain followed by two PHD domains, and a C-terminal MTF2 domain. PCL proteins specifically recognize tri-methylated H3K36 (H3K36me3) through their N-terminal Tudor domains. The interaction between their Tudor domains and H3K36me3 is critical for both the targeting and spreading of PRC2 into active chromatin regions and for the maintenance of optimal repression of poised developmental genes where PCL proteins, H3K36me3, and H3K27me3 coexist. Moreover, unlike other PHD domain-containing proteins, the first PHD domains of PCL proteins do not display histone H3K4 binding affinity and they do not affect the binding of the Tudor domain to histones.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 767956998  58 KLTEGQYVLCRWTDGLYYLGKIKRVSSSKQSCLVTFEDNSKYWVLWKDIQHAG 110
Cdd:cd20385    1 KFAEGQDVLARWTDGLFYLGTIKKVDSAKEKCLVIFEDDSTFWVLFKDIHKVP 53

Tudor domain found in PHD finger protein1 (PHF1) and similar proteins; PHF1, also called Polycomb-like protein 1 (PCL1), together with JARID2 and AEBP2, associates with the Polycomb repressive complex 2 (PRC2), which is the major H3K27 methyltransferase that regulates pluripotency, differentiation, and tumorigenesis, through catalysis of histone H3 lysine 27 trimethylation (H3K27me3) on chromatin. PHF1 is essential in epigenetic regulation and genome maintenance. It acts as a dual reader of lysine trimethylation at lysine 36 of histone H3 and lysine 27 of histone variant H3t. Moreover, PHF1 is required for efficient H3-K27 trimethylation (H3K27me3) and Hox gene silencing. It can mediate deposition of the repressive H3K27me3 mark and acts as a cofactor in early DNA-damage response. PHF1 consists of an N-terminal Tudor domain followed by two PHD domains, and a C-terminal MTF2 domain. Its Tudor domain selectively binds to histone H3K36me3.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....
gi 767956998  58 KLTEGQYVLCRWTDGLYYLGKIKRVSSSKQSCLVTFEDNSKYWVLWKDIQHAGV 111
Cdd:cd20449    1 RLWEGQDVLARWTDGLLYLGTIKKVDSAREVCLVQFEDDSQFLVLWKDISPAAL 54

Tudor domain found in metal-response element-binding transcription factor 2 (MTF2) and similar proteins; MTF2, also called metal regulatory transcription factor 2, metal-response element DNA-binding protein M96, or Polycomb-like protein 2 (PCL2), complexes with the Polycomb repressive complex-2 (PRC2) in embryonic stem cells and regulates the transcriptional networks during embryonic stem cell self-renewal and differentiation. It recruits the PRC2 complex to the inactive X chromosome and target loci in embryonic stem cells. Moreover, MTF2 is required for PRC2-mediated Hox cluster repression. It activates the Cdkn2a gene and promotes cellular senescence, thus suppressing the catalytic activity of PRC2 locally. MTF2, like other PCL family proteins, consists of an N-terminal Tudor domain followed by two PHD domains, and a C-terminal MTF2 domain. PCL proteins specifically recognize tri-methylated H3K36 (H3K36me3) through their N-terminal Tudor domains.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 767956998  58 KLTEGQYVLCRWTDGLYYLGKIKRVSSSKQSCLVTFEDNSKYWVLWKDIQ 107
Cdd:cd20450    1 KFEEGQDVLARWSDGLFYLGTIKKINKLKQSCFIIFEDSSKSWVLWKDIQ 50

Jumonji domain-containing protein 2A Tudor domain; This is the tudor domain found in histone demethylase Jumonji domain-containing protein 2A (JMJD2A). Structure and function analysis indicate that this domain can recognize equally well two unrelated histone peptides, H3K4me3 and H4K20me3, by means of two very different binding mechanisms. JMJD2 also known as KDM4, is a conserved iron (II)-dependent jumonji-domain demethylase subfamily that is essential during development. Vertebrate KDM4A-C proteins contain a conserved double tudor domain (DTD).

                          10        20        30
                  ....*....|....*....|....*....|....*.
gi 767956998   62 GQYVLCRWTDGLYYLGKIKRVsSSKQSCLVTFEDNS 97
Cdd:pfam18104   1 GQDVIARWTDGRYYLGKFIGI-HTQTFYEVEFEDGS 35

Tudor domain found in Drosophila melanogaster Polycomb protein PCL (dPCL)and similar proteins; dPCL, also called Polycomblike protein, is a Polycomb group (PcG) protein that is specifically required during the first 6 hours of embryogenesis to establish the repressed state. dPCL is a component of the Esc/E(z) complex, which methylates 'Lys-9' and 'Lys-27' residues of histone H3, leading to transcriptional repression of the affected target gene. Like other PCL family proteins, it consists of an N-terminal Tudor domain followed by two PHD domains, and a C-terminal MTF2 domain. PCL proteins specifically recognize tri-methylated H3K36 (H3K36me3) through their N-terminal Tudor domains.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*..
gi 767956998  60 TEGQYVLCRWTDGLYYLGKIKRVSSSKQSCLVTFEDNSKYWVLWKDI 106
Cdd:cd20452    4 SEGEDVLVKHNDGRFYLGTIVQIDSKEEQCLVKFDDNTEKWCSFKDL 50

PHD finger found in BRPF proteins, Jade proteins, protein AF-10, AF-17, and similar proteins; The family includes BRPF proteins, Jade proteins, protein AF-10 and AF-17. BRPF proteins are scaffold proteins that form monocytic leukemic zinc-finger protein (MOZ)/MOZ-related factor (MORF) H3 histone acetyltransferase (HAT) complexes with other regulatory subunits, such as inhibitor of growth 5 (ING5) and Esa1-associated factor 6 ortholog (EAF6). BRPF proteins have multiple domains, including a canonical Cys4HisCys3 plant homeodomain (PHD) zinc finger followed by a non-canonical extended PHD (ePHD) finger, Cys2HisCys5HisCys2His, a bromodomain and a proline-tryptophan-tryptophan-proline (PWWP) domain. PHD and ePHD fingers both bind to lysine 4 of histone H3 (K4H3), bromodomains interact with acetylated lysines on N-terminal tails of histones and other proteins, and PWWP domains show histone-binding and chromatin association properties. Jade proteins are required for ING4 and ING5 to associate with histone acetyltransferase (HAT) HBO1 and EAF6, to form a HBO1 complex that has a histone H4-specific acetyltransferase activity, a reduced activity toward histone H3, and is responsible for the bulk of histone H4 acetylation in vivo. AF-10, also termed ALL1 (acute lymphoblastic leukemia)-fused gene from chromosome 10 protein, is a transcription factor that has been implicated in the development of leukemia following chromosomal rearrangements between the AF10 gene and one of at least two other genes, MLL and CALM. AF-17, also termed ALL1-fused gene from chromosome 17 protein, is a putative transcription factor that may play a role in multiple signaling pathways. All Jade proteins, AF-10, and AF-17 contain a canonical PHD finger followed by a non-canonical ePHD finger. This model corresponds to the canonical PHD finger.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 767956998 117 KCNICLGKTSGPLNEILICGKCGLGYHQQCH-IPIAGSADqplltpWFCRRC 167
Cdd:cd15492    1 VCDVCLDGESEDDNEIVFCDGCNVAVHQSCYgIPLIPEGD------WFCRKC 46

Tudor domain superfamily; The Tudor domain is a conserved structural domain, originally identified in the Tudor protein of Drosophila, that adopts a beta-barrel-like core structure containing four short beta-strands followed by an alpha-helical region. It binds to proteins with dimethylated arginine or lysine residues, and may also bind methylated histone tails to facilitate protein-protein interactions. Tudor domain-containing proteins may mediate protein-protein interactions required for various DNA-templated biological processes, such as RNA metabolism, as well as histone modification and the DNA damage response. Members of this superfamily contain one or more copies of the Tudor domain.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*..
gi 767956998  62 GQYVLCRWT-DGLYYLGKIKRVSSSkQSCLVTFEDNSKYWVLWKDIQ 107
Cdd:cd04508    1 GDRVEAKWSdDGQWYPATVVAVNDD-GKYTVLFDDGNEEEVSEDDIR 46

PHD finger superfamily; The PHD finger superfamily includes a canonical plant homeodomain (PHD) finger typically characterized as Cys4HisCys3, and a non-canonical extended PHD finger, characterized as Cys2HisCys5HisCys2His. Variations include the RAG2 PHD finger characterized by Cys3His2Cys2His and the PHD finger 5 found in nuclear receptor-binding SET domain-containing proteins characterized by Cys4HisCys2His. The PHD finger is also termed LAP (leukemia-associated protein) motif or TTC (trithorax consensus) domain. Single or multiple copies of PHD fingers have been found in a variety of eukaryotic proteins involved in the control of gene transcription and chromatin dynamics. PHD fingers can recognize the unmodified and modified histone H3 tail, and some have been found to interact with non-histone proteins. They also function as epigenome readers controlling gene expression through molecular recruitment of multi-protein complexes of chromatin regulators and transcription factors. The PHD finger domain SF is structurally similar to the RING and FYVE_like superfamilies.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*....
gi 767956998 217 CYCGGPGEWYLRMLQCYRCRQWFHeacTQCLNEPMMFGDRFYLFFCSVC 265
Cdd:cd15489    3 IVCGKGGDLGGELLQCDGCGKWFH---ADCLGPPLSSFVPNGKWICPVC 48

PHD finger found in Schizosaccharomyces pombe Set1 complex component ash2 (spAsh2p) and similar proteins; spAsh2p, also termed Set1C component ash2, or COMPASS component ash2, or complex proteins associated with set1 protein ash2, or Lid2 complex component ash2, or Lid2C component ash2, is orthologous to Drosophila melanogaster Ash2 protein. Both spAsh2p and D. melanogaster Ash2 contain a plant homeodomain (PHD) finger and a SPRY domain. In contrast, its counterpart in Saccharomyces cerevisiae, Bre2p, has no PHD finger and is not included in this family. spAsh2p shows histone H3 Lys4 (H3K4) methyltransferase activity through its PHD finger. It also interacts with Lid2p in S. pombe. Human Ash2L contains an atypical PHD finger that lacks part of the Cys4HisCys3 signature characteristic of PHD fingers, it binds to only one zinc ion through the second half of the motif and does not have histone tail binding activity.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 767956998 216 YCYCGGPGEWYLRMLQCYRCRQWFHEACTQCLNEPMMFGDRFYLFFCSVC 265
Cdd:cd15583    1 YCYCGKDRNLGEVELQCSICLKWFHAKCVSIDNGSCLPFMTNYQFVCKRC 50

Tudor domain found in survival motor neuron protein (SMN), motor neuron-related-splicing factor 30 (SPF30), and similar proteins; This group contains SMN, SPF30, Tudor domain-containing protein 3 (TDRD3), DNA excision repair protein ERCC-6-like 2 (ERCC6L2), and similar proteins. SMN, also called component of gems 1, or Gemin-1, is part of a multimeric SMN complex that includes spliceosomal Sm core proteins and plays a catalyst role in the assembly of small nuclear ribonucleoproteins (snRNPs), the building blocks of the spliceosome. SPF30, also called 30 kDa splicing factor SMNrp, SMN-related protein, or survival motor neuron domain-containing protein 1 (SMNDC1), is an essential pre-mRNA splicing factor required for assembly of the U4/U5/U6 tri-small nuclear ribonucleoprotein into the spliceosome. TDRD3 is a scaffolding protein that specifically recognizes and binds dimethylarginine-containing proteins. ERCC6L2, also called DNA repair and recombination protein RAD26-like (RAD26L), may be involved in early DNA damage response. It regulates RNA Pol II-mediated transcription via its interaction with DNA-dependent protein kinase (DNA-PK) to resolve R loops and minimize transcription-associated genome instability. Members of this group contain a single Tudor domain. The Tudor domain binds to proteins with dimethylated arginine or lysine residues, and may also bind methylated histone tails to facilitate protein-protein interactions.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 767956998  62 GQYVLCRWT-DGLYYLGKIKRVSSSKQSCLVTFEDNSKY-WVLWKDIQHA 109
Cdd:cd21182    1 GDKCLAPYSdDGKYYEATIEEITEESDTATVVFDGYGNSeEVPLSDLKPL 50

PHD finger found in Arabidopsis thaliana pathogenesis-related homeodomain protein (PRHA) and similar proteins; PRHA is a homeodomain protein encoded by a single-copy Arabidopsis thaliana homeobox gene, prha. It shows the capacity to bind to TAATTG core sequence elements but requires additional adjacent bases for high-affinity binding. PRHA contains a plant homeodomain (PHD) finger, a homeodomain, peptide repeats and a putative leucine zipper dimerization domain.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*
gi 767956998 118 CNICLGKTSGPLNEILIC-GKCGLGYHQQCHIPIAGSADQPlltP----WFCRRC 167
Cdd:cd15504    2 CAKCQSGEASPDNDILLCdGGCNRAYHQKCLEPPLLTEDIP---PedegWLCPLC 53

PHD finger found in integrator complex subunit 12 (Int12) and similar proteins; Int12, also termed IntS12, or PHD finger protein 22, is a component of integrator, a multi-protein mediator of small nuclear RNA processing. The integrator complex directly interacts with the C-terminal domain of RNA polymerase II (RNAPII) largest subunit and mediates the 3' end processing of small nuclear RNAs (snRNAs) U1 and U2. Different from other components of integrator, Int12 contains a PHD finger, which is not required for snRNA 3' end cleavage. Instead, Int12 harbors a small microdomain at its N-terminus which is necessary and sufficient for Int12 function; this microdomain facilitates Int12 binding to Int1 and promotes snRNA 3' end formation.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 767956998 118 CNICLGKTSGPLNEILICGKCGLGYHQQCHIPIAgsADQPLLTP---WFCRRC 167
Cdd:cd15501    2 CVVCKQMDVTSGNQLVECQECHNLYHQECHKPPV--TDKDVNDPrlvWYCSRC 52

PHD finger superfamily; The PHD finger superfamily includes a canonical plant homeodomain (PHD) finger typically characterized as Cys4HisCys3, and a non-canonical extended PHD finger, characterized as Cys2HisCys5HisCys2His. Variations include the RAG2 PHD finger characterized by Cys3His2Cys2His and the PHD finger 5 found in nuclear receptor-binding SET domain-containing proteins characterized by Cys4HisCys2His. The PHD finger is also termed LAP (leukemia-associated protein) motif or TTC (trithorax consensus) domain. Single or multiple copies of PHD fingers have been found in a variety of eukaryotic proteins involved in the control of gene transcription and chromatin dynamics. PHD fingers can recognize the unmodified and modified histone H3 tail, and some have been found to interact with non-histone proteins. They also function as epigenome readers controlling gene expression through molecular recruitment of multi-protein complexes of chromatin regulators and transcription factors. The PHD finger domain SF is structurally similar to the RING and FYVE_like superfamilies.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 767956998 118 CNIClGKTSGPLNEILICGKCGLGYHQQCHIPIAGSADQPllTPWFCRRC 167
Cdd:cd15489    2 CIVC-GKGGDLGGELLQCDGCGKWFHADCLGPPLSSFVPN--GKWICPVC 48

PHD finger found in PHF2, PHF8 and KDM7; This family includes PHF2, PHF8, KDM7, and similar proteins. PHF2, also termed GRC5, or PHD finger protein 2, is a histone lysine demethylase ubiquitously expressed in various tissues. PHF8, also termed PHD finger protein 8, or KDM7B, is a monomethylated histone H4 lysine 20(H4K20me1) demethylase that transcriptionally regulates many cell cycle genes. It also preferentially acts on H3K9me2 and H3K9me1. PHF8 is modulated by CDC20-containing anaphase-promoting complex (APC (cdc20)) and plays an important role in the G2/M transition. It acts as a critical molecular sensor for mediating retinoic acid (RA) treatment response in RAR alpha-fusion-induced leukemia. Moreover, PHF8 is essential for cytoskeleton dynamics and is associated with X-linked mental retardation. KDM7, also termed JmjC domain-containing histone demethylation protein 1D (JHDM1D), or KIAA1718, is a dual histone demethylase that catalyzes demethylation of monomethylated and dimethylated H3K9 (H3K9me2/me1) and H3K27 (H3K27me2/me1), which functions as an eraser of silencing marks on chromatin during brain development. It also plays a tumor-suppressive role by regulating angiogenesis. All family members contain a plant homeodomain (PHD) finger and a JmjC domain.

                         10        20
                 ....*....|....*....|....*...
gi 767956998 216 YCYCGGPGEWYLRMLQCYRCRQWFHEAC 243
Cdd:cd15554    1 YCICRQPYDVTRFMIECDVCKDWFHGSC 28

PHD zinc finger; The plant homeodomain (PHD) finger is a C4HC3 zinc-finger-like motif found in nuclear proteins thought to be involved in epigenetics and chromatin-mediated transcriptional regulation. The PHD finger binds two zinc ions using the so-called 'cross-brace' motif and is thus structurally related to the RING finger and the FYVE finger. It is not yet known if PHD fingers have a common molecular function. Several reports suggest that it can function as a protein-protein interacton domain and it was recently demonstrated that the PHD finger of p300 can cooperate with the adjacent BROMO domain in nucleosome binding in vitro. Other reports suggesting that the PHD finger is a ubiquitin ligase have been refuted as these domains were RING fingers misidentified as PHD fingers.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|.
gi 767956998   216 YCY-CGGPGEWyLRMLQCYRCRQWFHEActqCLNEPMMFGDRFYLFFCSVC 265
Cdd:smart00249   1 YCSvCGKPDDG-GELLQCDGCDRWYHQT---CLGPPLLEEEPDGKWYCPKC 47

PHD finger found in Set1 complex component SPP1; Set1C component SPP1, also called COMPASS component Spp1, or Complex proteins associated with set1 protein Spp1, or Suppressor of PRP protein 1, is a component of the COMPASS complex that links histone methylation to initiation of meiotic recombination. It induces double-strand break (DSB) formation by tethering to recombinationally cold regions. SPP1 interacts with H3K4me3 and Mer2, a protein required for DSB formation, to promote recruitment of potential meiotic DSB sites to the chromosomal axis. SPP1 contains a PHD finger, a zinc binding motif.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 767956998 216 YCYCGGP--GEWylrMLQCYRCRQWFHeacTQCLNEPMMFGDRFYLFFCSVC 265
Cdd:cd16039    1 YCICQKPddGRW---MIACDGCDEWYH---FTCVNIPEADVELVDSFFCPPC 46

PHD finger found in bromodomain and PHD finger-containing (BRPF) proteins; The family of BRPF proteins includes BRPF1, BRD1/BRPF2, and BRPF3. They are scaffold proteins that form monocytic leukemic zinc-finger protein (MOZ)/MOZ-related factor (MORF) H3 histone acetyltransferase (HAT) complexes with other regulatory subunits, such as inhibitor of growth 5 (ING5) and Esa1-associated factor 6 ortholog (EAF6). BRPF proteins have multiple domains, including a canonical Cys4HisCys3 plant homeodomain (PHD) zinc finger followed by a non-canonical extended PHD (ePHD) finger, Cys2HisCys5HisCys2His, a bromodomain and a proline-tryptophan-tryptophan-proline (PWWP) domain. PHD and ePHD fingers both bind to lysine 4 of histone H3 (K4H3), bromodomains interact with acetylated lysines on N-terminal tails of histones and other proteins, and PWWP domains show histone-binding and chromatin association properties. This model corresponds to the canonical Cys4HisCys3 PHD finger.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 767956998 118 CNICLGKTSGPLNEILICGKCGLGYHQQCH-IPIAGSADqplltpWFCRRCI 168
Cdd:cd15572    4 CCICLDGECQNSNVILFCDMCNLAVHQECYgVPYIPEGQ------WLCRRCL 49

PHD finger found in bromodomain and PHD finger-containing protein 2 (BRPF2) and similar proteins; BRPF2, also termed bromodomain-containing protein 1 (BRD1), or BR140-like protein, is encoded by BRL (BR140 Like gene). It is responsible for the bulk of the acetylation of H3K14 and forms a novel monocytic leukemic zinc-finger protein (MOZ)/MOZ-related factor (MORF) H3 histone acetyltransferase (HAT) complex with HBO1 and ING4. The complex is required for full transcriptional activation of the erythroid-specific regulator genes essential for terminal differentiation and survival of erythroblasts in fetal liver. BRPF2 shows widespread expression and localizes to the nucleus within spermatocytes. It contains a cysteine rich region harboring a canonical Cys4HisCys3 plant homeodomain (PHD) finger followed by a non-canonical extended PHD (ePHD) finger, Cys2HisCys5HisCys2His, a bromodomain, and a proline-tryptophan-tryptophan-proline (PWWP) domain. This model corresponds to the canonical Cys4HisCys3 PHD finger.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*
gi 767956998 118 CNICLGKTSGPLNEILICGKCGLGYHQQC----HIPIAgsadqplltPWFCRRCI 168
Cdd:cd15677    4 CCICMDGECQNSNVILFCDMCNLAVHQECygvpYIPEG---------QWLCRHCL 49