Score = 88.2 bits (217), Expect = 1e-17, Method: Compositional matrix adjust.
Identities = 37/55 (67%), Positives = 47/55 (85%)
Query: 21 EEEGAEFSVETILDKRIVNGKIEYLLKWKGYSDDDNTWEPEENLDCPDLIANFIH 75
E E EF VE +LD+R+VNGK+EY LKWKG++D DNTWEPEENLDCP+LI +F++
Sbjct: 24 EAEPEEFVVEKVLDRRVVNGKVEYFLKWKGFTDADNTWEPEENLDCPELIEDFLN 78
Component of heterochromatin. Recognizes and binds histone H3 tails methylated at 'Lys-9', leading to epigenetic repression. Probably involved in the repression of many genes located in euchromatin, such as E2F1, MYC and CDC25A. Involved in the formation of functional kinetochore through interaction with MIS12 complex proteins. Mus musculus (taxid: 10090)
>sp|Q5R6X7|CBX3_PONAB Chromobox protein homolog 3 OS=Pongo abelii GN=CBX3 PE=2 SV=1
Score = 87.4 bits (215), Expect = 2e-17, Method: Compositional matrix adjust.
Identities = 37/55 (67%), Positives = 46/55 (83%)
Query: 21 EEEGAEFSVETILDKRIVNGKIEYLLKWKGYSDDDNTWEPEENLDCPDLIANFIH 75
E E EF VE +LD+R+VNGK+EY LKWKG++D DNTWEPEENLDCP+LI F++
Sbjct: 24 EAEPEEFVVEKVLDRRVVNGKVEYFLKWKGFTDADNTWEPEENLDCPELIEAFLN 78
Seems to be involved in transcriptional silencing in heterochromatin-like complexes. Recognizes and binds histone H3 tails methylated at 'Lys-9', leading to epigenetic repression. May contribute to the association of the heterochromatin with the inner nuclear membrane through its interaction with lamin B receptor (LBR). Involved in the formation of functional kinetochore through interaction with MIS12 complex proteins.
Pongo abelii (taxid: 9601)
>sp|Q13185|CBX3_HUMAN Chromobox protein homolog 3 OS=Homo sapiens GN=CBX3 PE=1 SV=4
Score = 87.4 bits (215), Expect = 2e-17, Method: Compositional matrix adjust.
Identities = 37/55 (67%), Positives = 46/55 (83%)
Query: 21 EEEGAEFSVETILDKRIVNGKIEYLLKWKGYSDDDNTWEPEENLDCPDLIANFIH 75
E E EF VE +LD+R+VNGK+EY LKWKG++D DNTWEPEENLDCP+LI F++
Sbjct: 24 EAEPEEFVVEKVLDRRVVNGKVEYFLKWKGFTDADNTWEPEENLDCPELIEAFLN 78
Seems to be involved in transcriptional silencing in heterochromatin-like complexes. Recognizes and binds histone H3 tails methylated at 'Lys-9', leading to epigenetic repression. May contribute to the association of the heterochromatin with the inner nuclear membrane through its interaction with lamin B receptor (LBR). Involved in the formation of functional kinetochore through interaction with MIS12 complex proteins.
Homo sapiens (taxid: 9606)
>sp|P83917|CBX1_MOUSE Chromobox protein homolog 1 OS=Mus musculus GN=Cbx1 PE=1 SV=1
Component of heterochromatin. Recognizes and binds histone H3 tails methylated at 'Lys-9', leading to epigenetic repression. Interaction with lamin B receptor (LBR) can contribute to the association of the heterochromatin with the inner nuclear membrane.
Mus musculus (taxid: 10090)
>sp|P83916|CBX1_HUMAN Chromobox protein homolog 1 OS=Homo sapiens GN=CBX1 PE=1 SV=1
Component of heterochromatin. Recognizes and binds histone H3 tails methylated at 'Lys-9', leading to epigenetic repression. Interaction with lamin B receptor (LBR) can contribute to the association of the heterochromatin with the inner nuclear membrane.
Homo sapiens (taxid: 9606)
>sp|P45973|CBX5_HUMAN Chromobox protein homolog 5 OS=Homo sapiens GN=CBX5 PE=1 SV=1
Component of heterochromatin that recognizes and binds histone H3 tails methylated at 'Lys-9' (H3K9me), leading to epigenetic repression. In contrast, it is excluded from chromatin when 'Tyr-41' of histone H3 is phosphorylated (H3Y41ph). Can interact with lamin-B receptor (LBR). This interaction can contribute to the association of the heterochromatin with the inner nuclear membrane. Involved in the formation of functional kinetochore through interaction with MIS12 complex proteins.
Homo sapiens (taxid: 9606)
>sp|Q61686|CBX5_MOUSE Chromobox protein homolog 5 OS=Mus musculus GN=Cbx5 PE=1 SV=1
Component of heterochromatin that recognizes and binds histone H3 tails methylated at 'Lys-9' (H3K9me), leading to epigenetic repression. In contrast, it is excluded from chromatin when 'Tyr-41' of histone H3 is phosphorylated (H3Y41ph). Can interact with lamin-B receptor (LBR). This interaction can contribute to the association of the heterochromatin with the inner nuclear membrane. Involved in the formation of functional kinetochore through interaction with MIS12 complex proteins.
Mus musculus (taxid: 10090)
>sp|P29227|HP1_DROVI Heterochromatin protein 1 OS=Drosophila virilis GN=Su(var)205 PE=3 SV=1
Structural component of heterochromatin, involved in gene repression and the modification of position-effect-variegation. Recognizes and binds histone H3 tails methylated at 'Lys-9', leading to epigenetic repression.
Drosophila virilis (taxid: 7244)
>sp|P05205|HP1_DROME Heterochromatin protein 1 OS=Drosophila melanogaster GN=Su(var)205 PE=1 SV=2
Structural component of heterochromatin, involved in gene repression and the modification of position-effect-variegation. Recognizes and binds histone H3 tails methylated at 'Lys-9', leading to epigenetic repression.
Drosophila melanogaster (taxid: 7227)
>sp|Q6AYK9|CDYL_RAT Chromodomain Y-like protein OS=Rattus norvegicus GN=Cdyl PE=2 SV=1
>gi|189234230|ref|XP_973019.2| PREDICTED: similar to chromobox homolog 1 [Tribolium castaneum] gi|270002409|gb|EEZ98856.1| hypothetical protein TcasGA2_TC004466 [Tribolium castaneum]
>gnl|CDD|237991 cd00024, CHROMO, Chromatin organization modifier (chromo) domain is a conserved region of around 50 amino acids found in a variety of chromosomal proteins, which appear to play a role in the functional organization of the eukaryotic nucleus
Score = 61.5 bits (150), Expect = 9e-15
Identities = 30/51 (58%), Positives = 36/51 (70%), Gaps = 3/51 (5%)
Query: 26 EFSVETILDKRIV--NGKIEYLLKWKGYSDDDNTWEPEENL-DCPDLIANF 73
E+ VE ILD R G+ EYL+KWKGYS ++TWEPEENL DC +LI F
Sbjct: 2 EYEVEKILDHRKKKDGGEYEYLVKWKGYSYSEDTWEPEENLEDCKELIDEF 52
Experimental evidence implicates the chromo domain in the binding activity of these proteins to methylated histone tails and maybe RNA. May occur as single instance, in a tandem arrangement or followd by a related "chromo shadow" domain. Length = 55
>PF00385 Chromo: Chromo (CHRromatin Organisation MOdifier) domain; InterPro: IPR023780 The CHROMO (CHRromatin Organization MOdifier) domain [, , , ] is a conserved region of around 60 amino acids, originally identified in Drosophila modifiers of variegation
These are proteins that alter the structure of chromatin to the condensed morphology of heterochromatin, a cytologically visible condition where gene expression is repressed. In one of these proteins, Polycomb, the chromo domain has been shown to be important for chromatin targeting. Proteins that contain a chromo domain appear to fall into 3 classes. The first class includes proteins having an N-terminal chromo domain followed by a region termed the chromo shadow domain, with weak but significant sequence similarity to the N-terminal chromo domain,[], eg. Drosophila and human heterochromatin protein Su(var)205 (HP1). The second class includes proteins with a single chromo domain, eg. Drosophila protein Polycomb (Pc); mammalian modifier 3; human Mi-2 autoantigen and several yeast and Caenorhabditis elegans hypothetical proteins. In the third class paired tandem chromo domains are found, eg. in mammalian DNA-binding/helicase proteins CHD-1 to CHD-4 and yeast protein CHD1. Functional dissections of chromo domain proteins suggests a mechanistic role for chromo domains in targeting chromo domain proteins to specific regions of the nucleus. The mechanism of targeting may involve protein-protein and/or protein/nucleic acid interactions. Hence, several line of evidence show that the HP1 chromo domain is a methyl-specific histone binding module, whereas the chromo domain of two protein components of the drosophila dosage compensation complex, MSL3 and MOF, contain chromo domains that bind to RNA in vitro []. The high resolution structures of HP1-family protein chromo and chromo shadow domain reveal a conserved chromo domain fold motif consisting of three beta strands packed against an alpha helix. The chromo domain fold belongs to the OB (oligonucleotide/oligosaccharide binding)-fold class found in a variety of prokaryotic and eukaryotic nucleic acid binding protein [].; PDB: 2H1E_B 3MWY_W 2DY8_A 1KNE_A 1KNA_A 1Q3L_A 2EE1_A 1AP0_A 1GUW_A 1X3P_A ....
>cd00024 CHROMO Chromatin organization modifier (chromo) domain is a conserved region of around 50 amino acids found in a variety of chromosomal proteins, which appear to play a role in the functional organization of the eukaryotic nucleus
Experimental evidence implicates the chromo domain in the binding activity of these proteins to methylated histone tails and maybe RNA. May occur as single instance, in a tandem arrangement or followd by a related "chromo shadow" domain.
>cd00034 ChSh Chromo Shadow Domain, found in association with N-terminal chromo (CHRromatin Organization MOdifier) domain; Chromo domains mediate the interaction of the heterochromatin with other heterochromatin proteins, thereby affecting chromatin structure (e
g. Drosophila and human heterochromatin protein (HP1) and mammalian modifier 1 and modifier 2)
>PF01393 Chromo_shadow: Chromo shadow domain Web page maintained by Rein Aasland; InterPro: IPR008251 Chromo shadow domain is distantly related to chromo domain
It is always found in association with a chromo domain. The CHROMO (CHRromatin Organization MOdifier) domain [, , , ] is a conserved region of around 60 amino acids, originally identified in Drosophila modifiers of variegation. These are proteins that alter the structure of chromatin to the condensed morphology of heterochromatin, a cytologically visible condition where gene expression is repressed. In one of these proteins, Polycomb, the chromo domain has been shown to be important for chromatin targeting. Proteins that contain a chromo domain appear to fall into 3 classes. The first class includes proteins having an N-terminal chromo domain followed by a region termed the chromo shadow domain [], eg. Drosophila and human heterochromatin protein Su(var)205 (HP1); and mammalian modifier 1 and modifier 2. The second class includes proteins with a single chromo domain, eg. Drosophila protein Polycomb (Pc); mammalian modifier 3; human Mi-2 autoantigenand and several yeast and Caenorhabditis elegans hypothetical proteins. In the third class paired tandem chromo domains are found, eg. in mammalian DNA-binding/helicase proteins CHD-1 to CHD-4 and yeast protein CHD1.; GO: 0005634 nucleus; PDB: 3Q6S_C 2FMM_B 3P7J_B 1E0B_B 3I3C_A 1DZ1_B 1S4Z_A 3KUP_D.
>2epb_A Chromodomain-helicase-DNA-binding protein 6; structural genomics, NPPSFA, national project on protein structural and functional analyses; NMR {Homo sapiens} Length = 68
>2epb_A Chromodomain-helicase-DNA-binding protein 6; structural genomics, NPPSFA, national project on protein structural and functional analyses; NMR {Homo sapiens}
>2bud_A Males-absent on the first protein; transferase, MOF, HAT, acetyl-transfer, dosage compensation complex, DCC, royal family; NMR {Drosophila melanogaster} SCOP: b.34.13.3
>2eqm_A PHD finger protein 20-like 1; structural genomics, NPPSFA, national project on protein structural and functional analyses; NMR {Homo sapiens} PDB: 2jtf_A