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 922581054  38 LCSICNKPEKEDEIVFCDRCDRGFHTYCVGLKKLPQGTWICDT 80
Cdd:cd15529    1 TCTKCGDPHDEDKMMFCDQCDRGYHTFCVGLRSIPDGRWICPL 43

PHD finger 2 found in PHD finger protein 10 (PHF10) and similar proteins; PHF10, also termed BRG1-associated factor 45a (BAF45a), or XAP135, is a ubiquitously expressed transcriptional regulator that is required for maintaining the undifferentiated status of neuroblasts. It contains a SAY (supporter of activation of yellow) domain and two adjacent plant homeodomain (PHD) fingers. This model corresponds to the second PHD finger.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|...
gi 922581054  38 LCSICNKPEKEDEIVFCDRCDRGFHTYCVGLKKLPQGTWICDT 80
Cdd:cd15529    1 TCTKCGDPHDEDKMMFCDQCDRGYHTFCVGLRSIPDGRWICPL 43

PHD zinc finger-containing protein [General function prediction only];

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 922581054  18 MPERMaalVKTYEWSCVDCRLCSICNKPEKEDE--IVFCDRCDRGFHTYCVGLKKLPQGTWIC 78
Cdd:COG5141  178 LPDKH---VEPIEPSDEFDDICTKCTSTHNENSnaIVFCDGCEICVHQSCYGIQFLPEGFWLC 237

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
                   ....*....|....*....|....*....|....*....|...
gi 922581054    39 CSICNKPEKEDEIVFCDRCDRGFHTYCVGLKKL---PQGTWIC 78
Cdd:smart00249   2 CSVCGKPDDGGELLQCDGCDRWYHQTCLGPPLLeeePDGKWYC 44

PHD finger 2 found in PHD finger protein 10 (PHF10) and similar proteins; PHF10, also termed BRG1-associated factor 45a (BAF45a), or XAP135, is a ubiquitously expressed transcriptional regulator that is required for maintaining the undifferentiated status of neuroblasts. It contains a SAY (supporter of activation of yellow) domain and two adjacent plant homeodomain (PHD) fingers. This model corresponds to the second PHD finger.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|...
gi 922581054  38 LCSICNKPEKEDEIVFCDRCDRGFHTYCVGLKKLPQGTWICDT 80
Cdd:cd15529    1 TCTKCGDPHDEDKMMFCDQCDRGYHTFCVGLRSIPDGRWICPL 43

PHD finger found in bromodomain adjacent to zinc finger domain protein 2A (BAZ2A) and 2B (BAZ2B); BAZ2A, also termed transcription termination factor I-interacting protein 5 (TTF-I-interacting protein 5, or Tip5), or WALp3, is an epigenetic regulator. It has been implicated in epigenetic rRNA gene silencing, as the large subunit of the SNF2h-containing chromatin-remodeling complex NoRC that induces nucleosome sliding in an ATP- and histone H4 tail-dependent fashion. BAZ2A has also been shown to be broadly overexpressed in prostate cancer, to regulate numerous protein-coding genes and to cooperate with EZH2 (enhancer of zeste homolog 2) to maintain epigenetic silencing at genes repressed in prostate cancer metastasis. Its overexpression is tightly associated with a prostate cancer subtype displaying CpG island methylator phenotype (CIMP) in tumors and with prostate cancer recurrence in patients. BAZ2B, also termed WALp4, is a bromodomain-containing protein whose biological role is still elusive. It shows high sequence similarly with BAZ2A. Both BAZ2A and BAZ2B contain a TAM (TIP5/ARBP/MBD) domain, a DDT domain, four AT-hooks, BAZ 1 and BAZ 2 motifs, a WAKZ (WSTF/Acf1/KIAA0314/ZK783.4) motif, a plant homeodomain (PHD) finger, and a bromodomain. BAZ2B also harbors an extra Apolipophorin-III like domain in its N-terminal region.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*
gi 922581054  38 LCSICNKPEKEDEIVFCDRCDRGFHTYCVG--LKKLPQGTWICDT 80
Cdd:cd15545    1 SCQICRSGDNEDQLLLCDGCDRGYHTYCFKpkMTNVPEGDWFCPE 45

PHD finger 2 found in d4 gene family proteins; The family includes proteins coded by three members of the d4 gene family, DPF1 (neuro-d4), DPF2 (ubi-d4/Requiem), and DPF3 (cer-d4), which function as transcription factors and are involved in transcriptional regulation of genes by changing the condensed/decondensed state of chromatin in the nucleus. DPF2 is ubiquitously expressed and it acts as a transcription factor that may participate in developmentally programmed cell death. DPF1 and DPF3 are expressed predominantly in neural tissues, and they may be involved in the transcription regulation of neuro-specific gene clusters. The d4 family proteins show distinct domain organization with domain 2/3 in the N-terminal region, a Cys2His2 (C2H2) zinc finger or Kruppel-type zinc finger in the central part and two adjacent plant homeodomain (PHD) fingers (d4-domain) in the C-terminal part of the molecule. This model corresponds to the second PHD finger.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|...
gi 922581054  39 CSICNKPEKEDEIVFCDRCDRGFHTYCVG--LKKLPQGTWICD 79
Cdd:cd15530    2 CSLCGTSENDDQLLFCDDCDRGYHMYCLSppMSEPPEGSWSCH 44

PHD finger 1 found in monocytic leukemia zinc-finger protein (MOZ), its factor (MORF), and d4 gene family proteins; MOZ is a MYST-type histone acetyltransferase (HAT) that functions as a coactivator for acute myeloid leukemia 1 protein (AML1)- and p53-dependent transcription. It possesses intrinsic HAT activity and to acetylate both itself and lysine (K) residues on histone H2B, histone H3 (K14) and histone H4 (K5, K8, K12 and K16) in vitro and H3K9 in vivo. MOZ-related factor (MORF) is a ubiquitously expressed transcriptional regulator with intrinsic HAT activity. It can interact with the Runt-domain transcription factor Runx2 and form a tetrameric complex with BRPFs, ING5, and EAF6. Both MOZ and MORF are catalytic subunits of HAT complexes that are required for normal developmental programs, such as hematopoiesis, neurogenesis, and skeletogenesis, and are implicated in human leukemias. MOZ is also the catalytic subunit of a tetrameric inhibitor of growth 5 (ING5) complex, which specifically acetylates nucleosomal histone H3K14. Moreover, MOZ and MORF are involved in regulating transcriptional activation mediated by Runx2 (or Cbfa1), a Runt-domain transcription factor known to play important roles in T cell lymphoma genesis and bone development, and its homologs. This family also includes three members of the d4 gene family, DPF1 (neuro-d4), DPF2 (ubi-d4/Requiem), and DPF3 (cer-d4), which function as transcription factors and are involved in transcriptional regulation of genes via changing the condensed/decondensed state of chromatin in nucleus. DPF2 is ubiquitously expressed and it acts as a transcription factor that may participate in developmentally programmed cell death. DPF1 and DPF3 are expressed predominantly in neural tissues, and they may be involved in the transcription regulation of neuro specific gene clusters. All family members contain two plant homeodomain (PHD) fingers. This model corresponds to the first PHD finger.

                         10        20        30
                 ....*....|....*....|....*....|....*.
gi 922581054   1 MICCATCKIAYHPQCIEMPERMAALVKTYEWSCVDC 36
Cdd:cd15526   21 LISCADCGSSGHPSCLKFSPGLTDAVKSYRWQCIEC 56

PHD finger found in protein Jade-1 and similar proteins; Jade-1, also termed PHD finger protein 17 (PHF17), is a novel binding partner of von Hippel-Lindau (VHL) tumor suppressor Pvhl, a key regulator of the cellular oxygen sensing pathway. It is highly expressed in renal proximal tubules. Jade-1 functions as an essential regulator of multiple cell signaling pathways. It may be involved in the serine/threonine kinase AKT/AKT1 pathway during renal cancer pathogenesis and normally prevents renal epithelial cell proliferation and transformation. It also acts as a pro-apoptotic and growth suppressive ubiquitin ligase to inhibit canonical Wnt downstream effector beta-catenin for proteasomal degradation, and as a transcription factor associated with histone acetyltransferase activity and with increased abundance of cyclin-dependent kinase inhibitor p21. Moreover, Jade-1 is required for ING4 and ING5 to associate with histone acetyltransferase (HAT) HBO1 and Eaf6 to form a HBO1 complex, and plays a role in epithelial cell regeneration. It has also been identified as a novel component of the nephrocystin protein (NPHP) complex and interacts with the ciliary protein nephrocystin-4 (NPHP4). Jade-1 contains a canonical Cys4HisCys3 plant homeodomain (PHD) finger followed by a non-canonical extended PHD (ePHD) finger, Cys2HisCys5HisCys2His, both of which are zinc-binding motifs. This model corresponds to the canonical Cys4HisCys3 PHD finger.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*
gi 922581054  38 LCSICNKPEKED--EIVFCDRCDRGFHTYCVGLKKLPQGTWICDT 80
Cdd:cd15679    1 VCDVCQSPDGEDgnEMVFCDKCNICVHQACYGILKVPEGSWLCRT 45

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
                   ....*....|....*....|....*....|....*....|...
gi 922581054    39 CSICNKPEKEDEIVFCDRCDRGFHTYCVGLKKL---PQGTWIC 78
Cdd:smart00249   2 CSVCGKPDDGGELLQCDGCDRWYHQTCLGPPLLeeePDGKWYC 44

PHD finger found in Remodeling and spacing factor 1 (Rsf-1); Rsf-1, also termed HBV pX-associated protein 8, or Hepatitis B virus X-associated protein alpha (HBxAPalpha), or p325 subunit of RSF chromatin-remodeling complex, is a novel nuclear protein with histone chaperon function. It is a subunit of an ISWI chromatin remodeling complex, remodeling and spacing factor (RSF), and plays a role in mediating ATPase-dependent chromatin remodeling and conferring tumor aggressiveness in common carcinomas. As an ataxia-telangiectasia mutated (ATM)-dependent chromatin remodeler, Rsf-1 facilitates DNA damage checkpoints and homologous recombination repair. It regulates the mitotic spindle checkpoint and chromosome instability through the association with serine/threonine kinase BubR1 (BubR1) and Hepatitis B virus (HBV) X protein (HBx) in the chromatin fraction during mitosis. It also interacts with cyclin E1 and promotes tumor development. Rsf-1 contains a plant homeodomain (PHD) finger.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|...
gi 922581054  38 LCSICNKPEKEDEIVFCDRCDRGFHTYCVG--LKKLPQGTWIC 78
Cdd:cd15543    1 PCRKCGLSDHPEWILLCDRCDAGYHTACLRppLMIIPDGNWFC 43

PHD finger 2 found in monocytic leukemia zinc-finger protein (MOZ) and its factor (MORF); MOZ, also termed histone acetyltransferase KAT6A, YBF2/SAS3, SAS2 and TIP60 protein 3 (MYST-3), or runt-related transcription factor-binding protein 2, or zinc finger protein 220, is a MYST-type histone acetyltransferase (HAT) that functions as a coactivator for acute myeloid leukemia 1 protein (AML1)- and p53-dependent transcription. It possesses intrinsic HAT activity to acetylate both itself and lysine (K) residues on histone H2B, histone H3 (K14) and histone H4 (K5, K8, K12 and K16) in vitro and H3K9 in vivo. MOZ-related factor (MORF), also termed MOZ2, or histone acetyltransferase KAT6B, or MOZ, YBF2/SAS3, SAS2 and TIP60 protein 4 (MYST4), is a ubiquitously expressed transcriptional regulator with intrinsic HAT activity. It can interact with the Runt-domain transcription factor Runx2 and form a tetrameric complex with BRPFs, ING5, and EAF6. Both MOZ and MORF are catalytic subunits of HAT complexes that are required for normal developmental programs, such as hematopoiesis, neurogenesis, and skeletogenesis, and are also implicated in human leukemias. MOZ is also the catalytic subunit of a tetrameric inhibitor of growth 5 (ING5) complex, which specifically acetylates nucleosomal histone H3K14. Moreover, MOZ and MORF are involved in regulating transcriptional activation mediated by Runx2 (or Cbfa1), a Runt-domain transcription factor known to play important roles in T cell lymphomagenesis and bone development, and its homologs. MOZ contains a linker histone 1 and histone 5 domains and two plant homeodomain (PHD) fingers. In contrast, MORF contains an N-terminal region containing two PHD fingers, a putative HAT domain, an acidic region, and a C-terminal Ser/Met-rich domain. The family corresponds to the first PHD finger.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|...
gi 922581054  39 CSICNKPEKEDEIVFCDRCDRGFHTYCVG--LKKLPQGTWICD 79
Cdd:cd15527    2 CSVCQDSGNADNLLFCDACDKGFHMECHDppLTRMPKGKWVCQ 44

PHD finger found in proteins Jade-1, Jade-2, Jade-3, and similar proteins; This family includes proteins Jade-1 (PHF17), Jade-2 (PHF15), and Jade-3 (PHF16), each of which is 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. This family also contains Drosophila melanogaster PHD finger protein rhinoceros (RNO). It is a novel plant homeodomain (PHD)-containing nuclear protein that may function as a transcription factor that antagonizes Ras signaling by regulating transcription of key EGFR/Ras pathway regulators in the Drosophila eye. All Jade proteins contain a canonical Cys4HisCys3 PHD finger followed by a non-canonical extended PHD (ePHD) finger, Cys2HisCys5HisCys2His, both of which are zinc-binding motifs. This model corresponds to the canonical Cys4HisCys3 PHD finger.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*
gi 922581054  38 LCSICNKPEKED--EIVFCDRCDRGFHTYCVGLKKLPQGTWICDT 80
Cdd:cd15573    1 VCDVCRSPDSEEgnEMVFCDKCNICVHQACYGIQKIPEGSWLCRT 45

PHD finger 1 found in Lysine-specific demethylase KDM5A, KDM5B, KDM5C, KDM5D and similar proteins; The JARID subfamily within the JmjC proteins includes Lysine-specific demethylase KDM5A, KDM5B, KDM5C, KDM5D and a Drosophila homolog, protein little imaginal discs (Lid). KDM5A was originally identified as a retinoblastoma protein (Rb)-binding partner and its inactivation may be important for Rb to promote differentiation. It is involved in transcription through interacting with TBP, p107, nuclear receptors, Myc, Sin3/HDAC, Mad1, RBP-J, CLOCK and BMAL1. KDM5B has a restricted expression pattern in the testis, ovary, and transiently in the mammary gland of the pregnant female and has been shown to be upregulated in breast cancer, prostate cancer, and lung cancer, suggesting a potential role in tumorigenesis. Both KDM5A and KDM5B function as trimethylated histone H3 lysine 4 (H3K4me3) demethylases. KDM5C is a H3K4 trimethyl-histone demethylase that catalyzes demethylation of H3K4me3 and H3K4me2 to H3K4me1. It plays a role in neuronal survival and dendrite development. KDM5C defects are associated with X-linked mental retardation (XLMR). KDM5D is a male-specific antigen that shows a demethylase activity specific for di- and tri-methylated histone H3K4 (H3K4me2 and H3K4me3), and has a male-specific function as a histone H3K4 demethylase by recruiting a meiosis-regulatory protein, MSH5, to condensed DNA. KDM5D directly interacts with a polycomb-like protein Ring6a/MBLR, and plays a role in regulation of transcriptional initiation through H3K4 demethylation. This family also includes Drosophila melanogaster protein little imaginal discs (Lid) that functions as a JmjC-dependent H3K4me3 demethylase, which is required for dMyc-induced cell growth. It positively regulates Hox gene expression in S2 cells. Members in this family contain the catalytic JmjC domain, JmjN, the BRIGHT domain, which is an AT-rich interacting domain (ARID), and a Cys5HisCys2 zinc finger, as well as two or three plant homeodomain (PHD) fingers. This model corresponds to the first PHD finger.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|..
gi 922581054  39 CSICNKPEKEDEIVFCDRCDRGFHTYCV--GLKKLPQGTWIC 78
Cdd:cd15515    2 CQVCGRGDDEDKLLLCDGCDDSYHTFCLipPLPDIPPGDWRC 43

PHD finger 1 found in D4, zinc and double PHD fingers family 3 (DPF3); DPF3, also termed BRG1-associated factor 45C (BAF45C), or zinc finger protein cer-d4, is encoded by a neuro-specific gene, cer-d4. It functions as a new epigenetic key factor for heart and muscle development and may be involved in the transcription regulation of neuro-specific gene clusters. It interacts with the BAF chromatin remodeling complex and binds methylated and acetylated lysine residues of histone 3 and 4. DPF3 contains a nuclear localization signal in the N-terminal region, a Cys2His2 (C2H2) zinc finger or Kruppel-type zinc-finger and a sequence of negatively charged amino acids in the central region, and a cysteine/histidine-rich region that is composed of two adjacent plant homeodomain (PHD) fingers (d4-domain) in the C-terminal part of the molecule. This model corresponds to the first PHD finger.

                         10        20        30
                 ....*....|....*....|....*....|....*..
gi 922581054   1 MICCATCKIAYHPQCIEMPERMAALVKTYEWSCVDCR 37
Cdd:cd15692   21 LVSCADCGRSGHPTCLQFTVNMTEAVKTYQWQCIECK 57

PHD finger 1 found in Lysine-specific demethylase 5C (KDM5C) and 5D (KDM5D); The family includes KDM5C and KDM5D, both of which belong to the JARID subfamily within the JmjC proteins. KDM5C (also termed Histone demethylase JARID1C, Jumonji/ARID domain-containing protein 1C, SmcX, or Xe169) is a H3K4 trimethyl-histone demethylase that catalyzes demethylation of H3K4me3 and H3K4me2 to H3K4me1. It plays a role in neuronal survival and dendrite development. KDM5C defects are associated with X-linked mental retardation (XLMR). KDM5D (also termed Histocompatibility Y antigen (H-Y), Histone demethylase JARID1D, Jumonji/ARID domain-containing protein 1D, or SmcY) is a male-specific antigen that shows a demethylase activity specific for di- and tri-methylated histone H3K4 (H3K4me3 andH3K4me2), and has a male-specific function as a histone H3K4 demethylase by recruiting a meiosis-regulatory protein, MSH5, to condensed DNA. KDM5D directly interacts with a polycomb-like protein Ring6a/MBLR, and plays a role in regulation of transcriptional initiation through H3K4 demethylation. Both KDM5C and KDM5D contain the catalytic JmjC domain, JmjN, the BRIGHT domain, which is an AT-rich interacting domain (ARID), and a Cys5HisCys2 zinc finger, as well as two plant homeodomain (PHD) fingers. This model corresponds to the first PHD finger.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|...
gi 922581054  38 LCSICNKPEKEDEIVFCDRCDRGFHTYCV--GLKKLPQGTWIC 78
Cdd:cd15604    1 VCRMCSRGDEDDKLLLCDGCDDNYHTFCLlpPLPEPPKGIWRC 43

PHD finger 1 found in Drosophila melanogaster protein little imaginal discs (Lid) and similar proteins; Drosophila melanogaster Lid, also termed Retinoblastoma-binding protein 2 homolog, is identified genetically as a trithorax group (trxG) protein that is a Drosophila homolog of the human protein JARID1A/kdm5A, a member of the JARID subfamily within the JmjC proteins. Lid functions as a JmjC-dependent trimethyl histone H3K4 (H3K4me3) demethylase, which is required for dMyc-induced cell growth. It positively regulates Hox gene expression in S2 cells. Lid contains the catalytic JmjC domain, JmjN, the BRIGHT domain, which is an AT-rich interacting domain (ARID), and a Cys5HisCys2 zinc finger, as well as three plant homeodomain (PHD) fingers. This model corresponds to the first PHD finger of Lid.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|...
gi 922581054  38 LCSICNKPEKEDEIVFCDRCDRGFHTYCV--GLKKLPQGTWIC 78
Cdd:cd15605    1 VCHTCGRGDGEESMLLCDGCDDSYHTFCLlpPLSEVPKGDWRC 43

PHD finger 1 found in metal-response element-binding transcription factor 2 (MTF2); MTF2, also termed metal regulatory transcription factor 2, or 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 consists of an N-terminal Tudor domain followed by two PHD fingers, and a C-terminal MTF2 domain. This model corresponds to the first PHD finger.

                         10        20        30
                 ....*....|....*....|....*....|
gi 922581054  38 LCSICNK--PEKEDEIVFCDRCDRGFHTYC 65
Cdd:cd15578    1 VCTVCQDgsSESPNEIVLCDKCGQGYHQLC 30

PHD finger 1 found in lysine-specific demethylase 5B (KDM5B); KDM5B (also termed Cancer/testis antigen 31 (CT31), Histone demethylase JARID1B, Jumonji/ARID domain-containing protein 1B (JARID1B), PLU-1, or retinoblastoma-binding protein 2 homolog 1 (RBP2-H1 or RBBP2H1A)) is a member of the JARID subfamily within the JmjC proteins. It has a restricted expression pattern in the testis, ovary, and transiently in the mammary gland of pregnant females and has been shown to be upregulated in breast cancer, prostate cancer, and lung cancer, suggesting a potential role in tumorigenesis. KDM5B acts as a histone demethylase that catalyzes the removal of trimethylation of lysine 4 on histone H3 (H3K4me3), induced by polychlorinated biphenyls (PCBs). It also mediates demethylation of H3K4me2 and H3K4me1. Moreover, KDM5B functions as a negative regulator of hematopoietic stem cell (HSC) self-renewal and progenitor cell activity. KDM5B has also been shown to interact with the DNA binding transcription factors BF-1 and PAX9, as well as TIEG1/KLF10 (transforming growth factor-beta inducible early gene-1/Kruppel-like transcription factor 10), and possibly function as a transcriptional corepressor. KDM5B contains the catalytic JmjC domain, JmjN, the BRIGHT domain, which is an AT-rich interacting domain (ARID), and a Cys5HisCys2 zinc finger, as well as three plant homeodomain (PHD) fingers. This model corresponds to the first PHD finger.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|...
gi 922581054  38 LCSICNKPEKEDEIVFCDRCDRGFHTYCV--GLKKLPQGTWIC 78
Cdd:cd15603    1 VCLVCGSGNDEDRLLLCDGCDDSYHTFCLipPLHDVPKGDWRC 43

PHD finger found in bromodomain adjacent to zinc finger domain protein 1B (BAZ1B); BAZ1B, also termed Tyrosine-protein kinase BAZ1B, or Williams syndrome transcription factor (WSTF), or Williams-Beuren syndrome chromosomal region 10 protein, Williams-Beuren syndrome chromosomal region 9 protein, or WALp2, is a multifunctional protein implicated in several nuclear processes, including replication, transcription, and the DNA damage response. BAZ1B/WSTF, together with the imitation switch (ISWI) ATPase, forms a WSTF-ISWI chromatin remodeling complex (WICH), which transiently associates with the human inactive X chromosome (Xi) during late S-phase prior to BRCA1 and gamma-H2AX. Moreover, BAZ1B/WSTF, SNF2h, and nuclear myosin 1 (NM1) forms the chromatin remodeling complex B-WICH that is involved in regulating rDNA transcription. BAZ1B contains a WAC motif, a DDT domain, BAZ 1 and BAZ 2 motifs, a WAKZ (WSTF/Acf1/KIAA0314/ZK783.4) motif, a plant homeodomain (PHD) finger, and a bromodomain.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|..
gi 922581054  39 CSICNKPEKEDEIVFCDRCDRGFHTYCV--GLKKLPQGTWIC 78
Cdd:cd15628    2 CKVCRKKGEDDKLILCDECNQAFHLFCLrpALYEVPDGEWMC 43

PHD finger 1 found in Lysine-specific demethylase 5A (KDM5A); KDM5A (also termed Histone demethylase JARID1A, Jumonji/ARID domain-containing protein 1A, or Retinoblastoma-binding protein 2 (RBBP-2 or RBP2)) was originally identified as a retinoblastoma protein (Rb)-binding partner and its inactivation may be important for Rb to promote differentiation. It is involved in transcription through interacting with TBP, p107, nuclear receptors, Myc, Sin3/HDAC, Mad1, RBP-J, CLOCK and BMAL1. KDM5A functions as a trimethylated histone H3 lysine 4 (H3K4me3) demethylase that belongs to the JARID subfamily within the JmjC proteins. It also displays DNA-binding activities that can recognize the specific DNA sequence CCGCCC. KDM5A contains the catalytic JmjC domain, JmjN, the BRIGHT domain, which is an AT-rich interacting domain (ARID), and a Cys5HisCys2 zinc finger, as well as three plant homeodomain (PHD) fingers. This model corresponds to the first PHD finger.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|...
gi 922581054  38 LCSICNKPEKEDEIVFCDRCDRGFHTYCV--GLKKLPQGTWIC 78
Cdd:cd15602    1 VCLFCGRGNNEDKLLLCDGCDDSYHTFCLipPLPDVPKGDWRC 43

PHD finger found in bromodomain adjacent to zinc finger domain protein 2B (BAZ2B); BAZ2B, also termed WALp4, is a bromodomain-containing protein whose biological role is still elusive. It shows high sequence similarly with BAZ2A, which is the large subunit of the SNF2h-containing chromatin-remodeling complex NoRC that induces nucleosome sliding in an ATP-and histone H4 tail-dependent fashion. BAZ2B contains a TAM (TIP5/ARBP/MBD) domain, an Apolipophorin-III like domain, a DDT domain, four AT-hooks, BAZ 1 and BAZ 2 motifs, a WAKZ (WSTF/Acf1/KIAA0314/ZK783.4) motif, a plant homeodomain (PHD) finger, and a bromodomain.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|..
gi 922581054  39 CSICNKPEKEDEIVFCDRCDRGFHTYC--VGLKKLPQGTWIC 78
Cdd:cd15630    3 CQICRKGDNEELLLLCDGCDKGCHTYChrPKITTIPEGDWFC 44

PHD finger 2 found in Histone-lysine N-methyltransferase 2C (KMT2C) and 2D (KMT2D); KMT2C, also termed myeloid/lymphoid or mixed-lineage leukemia protein 3 (MLL3) or homologous to ALR protein, is a histone H3 lysine 4 (H3K4) lysine methyltransferase that functions as a circadian factor contributing to genome-scale circadian transcription. It is a component of a large complex that acts as a coactivator of multiple transcription factors, including the bile acid (BA)-activated nuclear receptor, farnesoid X receptor (FXR), a critical player in BA homeostasis. The MLL3 complex is essential for p53 transactivation of small heterodimer partner (SHP). KMT2C is also a part of activating signal cointegrator-2 (ASC-2)-containing complex (ASCOM) that contains the transcriptional coactivator nuclear receptor coactivator 6 (NCOA6), KMT2C and its paralog MLL4. The ASCOM complex is critical for nuclear receptor (NR) activation of bile acid transporter genes and is down regulated in cholestasis. KMT2D, also termed ALL1-related protein (ALR), is encoded by the gene that was named MLL4, a fourth human homolog of Drosophila trithorax, located on chromosome 12. It enzymatically generates trimethylated histone H3 Lysine 4 (H3K4me3). It plays an essential role in differentiating the human pluripotent embryonal carcinoma cell line NTERA-2 clone D1 (NT2/D1) stem cells by activating differentiation-specific genes, such as HOXA1-3 and NESTIN. KMT2D is also a part of ASCOM. Both KMT2C and KMT2D contain the catalytic domain SET, five plant homeodomain (PHD) fingers, two extended PHD (ePHD) fingers, Cys2HisCys5HisCys2His, a RING finger, an HMG (high-mobilitygroup)-binding motif, and two FY-rich regions. This model corresponds to the second PHD finger.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|..
gi 922581054  39 CSICNKPEKEDEIVFCDRCDRGFHTYCVG--LKKLPQGTWIC 78
Cdd:cd15510    2 CQACRQPGDDTKMLVCETCDKGYHTSCLRpvMSSIPKYGWKC 43

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
                 ....*....|....*....|....*....|....*....|...
gi 922581054  38 LCSICNKPEKEDE--IVFCDRCDRGFHTYCVGLKKLPQGTWIC 78
Cdd:cd15677    3 VCCICMDGECQNSnvILFCDMCNLAVHQECYGVPYIPEGQWLC 45

PHD finger found in PHD and RING finger domain-containing protein 1 (PHRF1); PHRF1, also termed KIAA1542, or CTD-binding SR-like protein rA9, is a ubiquitin ligase that induces the ubiquitination of TGIF (TG-interacting factor) at lysine 130. It acts as a tumor suppressor that promotes the transforming growth factor (TGF)-beta cytostatic program through selective release of TGIF-driven promyelocytic leukemia protein (PML) inactivation. PHRF1 contains a plant homeodomain (PHD) finger and a RING finger.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|..
gi 922581054  39 CSICNKPEKEDEIVFCDRCDRGFHTYCVG--LKKLPQGTWIC 78
Cdd:cd15536    2 CEVCGRSDREDRLLLCDGCDAGYHMECLTppLDEVPIEEWFC 43

PHD finger found in bromodomain and PHD finger-containing protein 1 (BRPF1) and similar proteins; BRPF1, also termed peregrin or protein Br140, is a multi-domain protein that binds histones, mediates monocytic leukemic zinc-finger protein (MOZ)-dependent histone acetylation, and is required for Hox gene expression and segmental identity. It is a close partner of the MOZ histone acetyltransferase (HAT) complex and a novel Trithorax group (TrxG) member with a central role during development. BRPF1 is primarily a nuclear protein that has a broad tissue distribution and is abundant in testes and spermatogonia. It contains 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. BRPF1 may be involved in chromatin remodeling. This model corresponds to the canonical Cys4HisCys3 PHD finger.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|...
gi 922581054  38 LCSICNKPEKEDE--IVFCDRCDRGFHTYCVGLKKLPQGTWIC 78
Cdd:cd15676    9 VCCICNDGECQNSnvILFCDMCNLAVHQECYGVPYIPEGQWLC 51