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| | <StructureSection load='3g7l' size='340' side='right'caption='[[3g7l]], [[Resolution|resolution]] 2.20Å' scene=''> | | <StructureSection load='3g7l' size='340' side='right'caption='[[3g7l]], [[Resolution|resolution]] 2.20Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3g7l]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Cbs_356 Cbs 356]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3G7L OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3G7L FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3g7l]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Schizosaccharomyces_pombe Schizosaccharomyces pombe] and [https://en.wikipedia.org/wiki/Schizosaccharomyces_pombe_972h- Schizosaccharomyces pombe 972h-]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3G7L OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3G7L FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACY:ACETIC+ACID'>ACY</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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]] 2.2Å</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> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACY:ACETIC+ACID'>ACY</scene>, <scene name='pdbligand=M3L:N-TRIMETHYLLYSINE'>M3L</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">chp1, SPAC18G6.02c ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4896 CBS 356])</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=3g7l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3g7l OCA], [https://pdbe.org/3g7l PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3g7l RCSB], [https://www.ebi.ac.uk/pdbsum/3g7l PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3g7l 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=3g7l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3g7l OCA], [https://pdbe.org/3g7l PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3g7l RCSB], [https://www.ebi.ac.uk/pdbsum/3g7l PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3g7l ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/CHP1_SCHPO CHP1_SCHPO]] Component of the kinetochore which plays a role in stabilizing microtubules and so allowing accurate chromosome segregation. Has a role in the RNA interference (RNAi) pathway which is important for heterochromatin formation and accurate chromosome segregation. A member of the RNA-induced transcriptional silencing (RITS) complex which is involved in the biosynthesis of dsRNA from primer siRNAs provided by the RNA-directed RNA polymerase (RDRC) complex.<ref>PMID:9722643</ref> <ref>PMID:10835380</ref> <ref>PMID:15607976</ref> <ref>PMID:14704433</ref>
| + | [https://www.uniprot.org/uniprot/CHP1_SCHPO CHP1_SCHPO] Component of the kinetochore which plays a role in stabilizing microtubules and so allowing accurate chromosome segregation. Has a role in the RNA interference (RNAi) pathway which is important for heterochromatin formation and accurate chromosome segregation. A member of the RNA-induced transcriptional silencing (RITS) complex which is involved in the biosynthesis of dsRNA from primer siRNAs provided by the RNA-directed RNA polymerase (RDRC) complex.<ref>PMID:9722643</ref> <ref>PMID:10835380</ref> <ref>PMID:15607976</ref> <ref>PMID:14704433</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Cbs 356]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Joshua-Tor, L]] | + | [[Category: Schizosaccharomyces pombe]] |
| - | [[Category: Schalch, T]] | + | [[Category: Schizosaccharomyces pombe 972h-]] |
| - | [[Category: Acetylation]]
| + | [[Category: Joshua-Tor L]] |
| - | [[Category: Cell cycle]]
| + | [[Category: Schalch T]] |
| - | [[Category: Chromodomain]]
| + | |
| - | [[Category: Chromosomal protein]]
| + | |
| - | [[Category: Chromosome partition]]
| + | |
| - | [[Category: Dna damage]]
| + | |
| - | [[Category: Dna repair]]
| + | |
| - | [[Category: Dna-binding]]
| + | |
| - | [[Category: Methylation]] | + | |
| - | [[Category: Nuclear protein]]
| + | |
| - | [[Category: Nucleosome core]]
| + | |
| - | [[Category: Nucleus]]
| + | |
| - | [[Category: Phosphoprotein]]
| + | |
| - | [[Category: Protein-peptide complex]]
| + | |
| - | [[Category: Rna-mediated gene silencing]] | + | |
| - | [[Category: Silencing]]
| + | |
| Structural highlights
Function
CHP1_SCHPO Component of the kinetochore which plays a role in stabilizing microtubules and so allowing accurate chromosome segregation. Has a role in the RNA interference (RNAi) pathway which is important for heterochromatin formation and accurate chromosome segregation. A member of the RNA-induced transcriptional silencing (RITS) complex which is involved in the biosynthesis of dsRNA from primer siRNAs provided by the RNA-directed RNA polymerase (RDRC) complex.[1] [2] [3] [4]
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
In fission yeast, assembly of centromeric heterochromatin requires the RITS complex, which consists of Ago1, Tas3, Chp1, and siRNAs derived from centromeric repeats. Recruitment of RITS to centromeres has been proposed to depend on siRNA-dependent targeting of Ago1 to centromeric sequences. Previously, we demonstrated that methylated lysine 9 of histone H3 (H3K9me) acts upstream of siRNAs during heterochromatin establishment. Our crystal structure of Chp1's chromodomain in complex with a trimethylated lysine 9 H3 peptide reveals extensive sites of contact that contribute to Chp1's high-affinity binding. We found that this high-affinity binding is critical for the efficient establishment of centromeric heterochromatin, but preassembled heterochromatin can be maintained when Chp1's affinity for H3K9me is greatly reduced.
High-affinity binding of Chp1 chromodomain to K9 methylated histone H3 is required to establish centromeric heterochromatin.,Schalch T, Job G, Noffsinger VJ, Shanker S, Kuscu C, Joshua-Tor L, Partridge JF Mol Cell. 2009 Apr 10;34(1):36-46. PMID:19362535[5]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Doe CL, Wang G, Chow C, Fricker MD, Singh PB, Mellor EJ. The fission yeast chromo domain encoding gene chp1(+) is required for chromosome segregation and shows a genetic interaction with alpha-tubulin. Nucleic Acids Res. 1998 Sep 15;26(18):4222-9. PMID:9722643
- ↑ Thon G, Verhein-Hansen J. Four chromo-domain proteins of Schizosaccharomyces pombe differentially repress transcription at various chromosomal locations. Genetics. 2000 Jun;155(2):551-68. PMID:10835380
- ↑ Motamedi MR, Verdel A, Colmenares SU, Gerber SA, Gygi SP, Moazed D. Two RNAi complexes, RITS and RDRC, physically interact and localize to noncoding centromeric RNAs. Cell. 2004 Dec 17;119(6):789-802. PMID:15607976 doi:10.1016/j.cell.2004.11.034
- ↑ Verdel A, Jia S, Gerber S, Sugiyama T, Gygi S, Grewal SI, Moazed D. RNAi-mediated targeting of heterochromatin by the RITS complex. Science. 2004 Jan 30;303(5658):672-6. Epub 2004 Jan 2. PMID:14704433 doi:10.1126/science.1093686
- ↑ Schalch T, Job G, Noffsinger VJ, Shanker S, Kuscu C, Joshua-Tor L, Partridge JF. High-affinity binding of Chp1 chromodomain to K9 methylated histone H3 is required to establish centromeric heterochromatin. Mol Cell. 2009 Apr 10;34(1):36-46. PMID:19362535 doi:10.1016/j.molcel.2009.02.024
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