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3gv6

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Crystal Structure of human chromobox homolog 6 (CBX6) with H3K9 peptide

Structural highlights

3gv6 is a 2 chain structure with sequence from Homo sapiens and Xenopus laevis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.76Å
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

CBX6_HUMAN Component of a Polycomb group (PcG) multiprotein PRC1-like complex, a complex class required to maintain the transcriptionally repressive state of many genes, including Hox genes, throughout development. PcG PRC1 complex acts via chromatin remodeling and modification of histones; it mediates monoubiquitination of histone H2A 'Lys-119', rendering chromatin heritably changed in its expressibility.^[1]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The eight mammalian Cbx proteins are chromodomain-containing proteins involved in regulation of heterochromatin, gene expression, and developmental programs. They are evolutionarily related to the Drosophila HP1 (dHP1) and Pc (dPc) proteins that are key components of chromatin-associated complexes capable of recognizing repressive marks such as trimethylated Lys-9 and Lys-27, respectively, on histone H3. However, the binding specificity and function of the human homologs, Cbx1-8, remain unclear. To this end we employed structural, biophysical, and mutagenic approaches to characterize the molecular determinants of sequence contextual methyllysine binding to human Cbx1-8 proteins. Although all three human HP1 homologs (Cbx1, -3, -5) replicate the structural and binding features of their dHP counterparts, the five Pc homologs (Cbx2, -4, -6, -7, -8) bind with lower affinity to H3K9me3 or H3K27me3 peptides and are unable to distinguish between these two marks. Additionally, peptide permutation arrays revealed a greater sequence tolerance within the Pc family and suggest alternative nonhistone sequences as potential binding targets for this class of chromodomains. Our structures explain the divergence of peptide binding selectivity in the Pc subfamily and highlight previously unrecognized features of the chromodomain that influence binding and specificity.

Recognition and specificity determinants of the human cbx chromodomains.,Kaustov L, Ouyang H, Amaya M, Lemak A, Nady N, Duan S, Wasney GA, Li Z, Vedadi M, Schapira M, Min J, Arrowsmith CH J Biol Chem. 2011 Jan 7;286(1):521-9. Epub 2010 Nov 3. PMID:21047797^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Vandamme J, Volkel P, Rosnoblet C, Le Faou P, Angrand PO. Interaction proteomics analysis of polycomb proteins defines distinct PRC1 complexes in mammalian cells. Mol Cell Proteomics. 2011 Apr;10(4):M110.002642. doi: 10.1074/mcp.M110.002642., Epub 2011 Jan 31. PMID:21282530 doi:10.1074/mcp.M110.002642
↑ Kaustov L, Ouyang H, Amaya M, Lemak A, Nady N, Duan S, Wasney GA, Li Z, Vedadi M, Schapira M, Min J, Arrowsmith CH. Recognition and specificity determinants of the human cbx chromodomains. J Biol Chem. 2011 Jan 7;286(1):521-9. Epub 2010 Nov 3. PMID:21047797 doi:10.1074/jbc.M110.191411

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3gv6"

@@ Line 1: / Line 1: @@
 ==Crystal Structure of human chromobox homolog 6 (CBX6) with H3K9 peptide==
-<StructureSection load='3gv6' size='340' side='right' caption='[[3gv6]], [[Resolution|resolution]] 1.76&Aring;' scene=''>
+<StructureSection load='3gv6' size='340' side='right'caption='[[3gv6]], [[Resolution|resolution]] 1.76&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3gv6]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3GV6 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3GV6 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3gv6]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Xenopus_laevis Xenopus laevis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3GV6 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3GV6 FirstGlance]. <br>
-</td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=M3L:N-TRIMETHYLLYSINE'>M3L</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.76&#8491;</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CBX6 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=M3L:N-TRIMETHYLLYSINE'>M3L</scene></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3gv6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3gv6 OCA], [http://pdbe.org/3gv6 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3gv6 RCSB], [http://www.ebi.ac.uk/pdbsum/3gv6 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3gv6 ProSAT]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3gv6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3gv6 OCA], [https://pdbe.org/3gv6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3gv6 RCSB], [https://www.ebi.ac.uk/pdbsum/3gv6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3gv6 ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/CBX6_HUMAN CBX6_HUMAN]] Component of a Polycomb group (PcG) multiprotein PRC1-like complex, a complex class required to maintain the transcriptionally repressive state of many genes, including Hox genes, throughout development. PcG PRC1 complex acts via chromatin remodeling and modification of histones; it mediates monoubiquitination of histone H2A 'Lys-119', rendering chromatin heritably changed in its expressibility.<ref>PMID:21282530</ref>
+[https://www.uniprot.org/uniprot/CBX6_HUMAN CBX6_HUMAN] Component of a Polycomb group (PcG) multiprotein PRC1-like complex, a complex class required to maintain the transcriptionally repressive state of many genes, including Hox genes, throughout development. PcG PRC1 complex acts via chromatin remodeling and modification of histones; it mediates monoubiquitination of histone H2A 'Lys-119', rendering chromatin heritably changed in its expressibility.<ref>PMID:21282530</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 33: / Line 33: @@
 __TOC__
 </StructureSection>
-[[Category: Human]]
+[[Category: Homo sapiens]]
-[[Category: Amaya, M F]]
+[[Category: Large Structures]]
-[[Category: Arrowsmith, C H]]
+[[Category: Xenopus laevis]]
-[[Category: Bochkarev, A]]
+[[Category: Amaya MF]]
-[[Category: Bountra, C]]
+[[Category: Arrowsmith CH]]
-[[Category: Dong, A]]
+[[Category: Bochkarev A]]
-[[Category: Edwards, A M]]
+[[Category: Bountra C]]
-[[Category: Kozieradzki, I]]
+[[Category: Dong A]]
-[[Category: Li, Z]]
+[[Category: Edwards AM]]
-[[Category: Loppnau, P]]
+[[Category: Kozieradzki I]]
-[[Category: Min, J]]
+[[Category: Li Z]]
-[[Category: Ouyang, H]]
+[[Category: Loppnau P]]
-[[Category: Structural genomic]]
+[[Category: Min J]]
-[[Category: Weigelt, J]]
+[[Category: Ouyang H]]
-[[Category: Cbx6]]
+[[Category: Weigelt J]]
-[[Category: Chromatin regulator]]
-[[Category: Chromobox homolog]]
-[[Category: Chromosomal protein]]
-[[Category: Dna-binding]]
-[[Category: H3k9 peptide]]
-[[Category: Nucleosome core]]
-[[Category: Nucleus]]
-[[Category: Phosphoprotein]]
-[[Category: Repressor]]
-[[Category: Sgc]]
-[[Category: Transcription]]
-[[Category: Transcription regulation]]
-[[Category: Transcription-dna binding protein complex]]

3gv6

From Proteopedia

Current revision

Crystal Structure of human chromobox homolog 6 (CBX6) with H3K9 peptide

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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