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| | ==Crystal structure of the kinetechore protein Iml3 from budding yeast== | | ==Crystal structure of the kinetechore protein Iml3 from budding yeast== |
| - | <StructureSection load='4kr1' size='340' side='right' caption='[[4kr1]], [[Resolution|resolution]] 2.50Å' scene=''> | + | <StructureSection load='4kr1' size='340' side='right'caption='[[4kr1]], [[Resolution|resolution]] 2.50Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4kr1]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Baker's_yeast Baker's yeast]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4KR1 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4KR1 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4kr1]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_S288C Saccharomyces cerevisiae S288C]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4KR1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4KR1 FirstGlance]. <br> |
| - | </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</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]] 2.5Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">IML3, MCM19, YBR107C, YBR0836 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Baker's yeast])</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</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=4kr1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4kr1 OCA], [http://pdbe.org/4kr1 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4kr1 RCSB], [http://www.ebi.ac.uk/pdbsum/4kr1 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4kr1 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=4kr1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4kr1 OCA], [https://pdbe.org/4kr1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4kr1 RCSB], [https://www.ebi.ac.uk/pdbsum/4kr1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4kr1 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/IML3_YEAST IML3_YEAST]] Component of the central kinetochore, which mediates the attachment of the centromere to the mitotic spindle by forming essential interactions between the microtubule-associated outer kinetochore proteins and the centromere-associated inner kinetochore proteins. Required for establishing bipolar spindle-microtubule attachments and proper chromosome segregation.<ref>PMID:11361335</ref> <ref>PMID:15241623</ref> | + | [https://www.uniprot.org/uniprot/CENPL_YEAST CENPL_YEAST] Component of the kinetochore, a multiprotein complex that assembles on centromeric DNA and attaches chromosomes to spindle microtubules, mediating chromosome segregation and sister chromatid segregation during meiosis and mitosis. Component of the inner kinetochore constitutive centromere-associated network (CCAN), which serves as a structural platform for outer kinetochore assembly.<ref>PMID:11361335</ref> <ref>PMID:15241623</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Baker's yeast]] | + | [[Category: Large Structures]] |
| - | [[Category: Guo, Q]] | + | [[Category: Saccharomyces cerevisiae S288C]] |
| - | [[Category: Tao, Y]] | + | [[Category: Guo Q]] |
| - | [[Category: Teng, M]] | + | [[Category: Tao Y]] |
| - | [[Category: Cell cycle]] | + | [[Category: Teng M]] |
| - | [[Category: Chromosome segregation]]
| + | |
| - | [[Category: Kinetochore protein]]
| + | |
| Structural highlights
Function
CENPL_YEAST Component of the kinetochore, a multiprotein complex that assembles on centromeric DNA and attaches chromosomes to spindle microtubules, mediating chromosome segregation and sister chromatid segregation during meiosis and mitosis. Component of the inner kinetochore constitutive centromere-associated network (CCAN), which serves as a structural platform for outer kinetochore assembly.[1] [2]
Publication Abstract from PubMed
Human CENP-N and CENP-L have been reported to selectively recognize the CENP-A nucleosome and to contribute to recruiting other constitutive centromere-associated network (CCAN) complexes involved in assembly of the inner kinetochore. As their homologues, Chl4 and Iml3 from budding yeast function in a similar way in de novo assembly of the kinetochore. A lack of biochemical and structural information precludes further understanding of their exact role at the molecular level. Here, the crystal structure of Iml3 is presented and the structure shows that Iml3 adopts an elongated conformation with a series of intramolecular interactions. Pull-down assays revealed that the C-terminal domain of Chl4, which forms a dimer in solution, is responsible for Iml3 binding. Acting as a heterodimer, the Chl4-Iml3 complex exhibits a low-affinity nonspecific DNA-binding activity which may play an important role in the kinetochore-assembly process.
Structural insights into the role of the Chl4-Iml3 complex in kinetochore assembly.,Guo Q, Tao Y, Liu H, Teng M, Li X Acta Crystallogr D Biol Crystallogr. 2013 Dec;69(Pt 12):2412-9. doi:, 10.1107/S0907444913022397. Epub 2013 Nov 19. PMID:24311582[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Ghosh SK, Poddar A, Hajra S, Sanyal K, Sinha P. The IML3/MCM19 gene of Saccharomyces cerevisiae is required for a kinetochore-related process during chromosome segregation. Mol Genet Genomics. 2001 Apr;265(2):249-57. PMID:11361335
- ↑ Ghosh SK, Sau S, Lahiri S, Lohia A, Sinha P. The Iml3 protein of the budding yeast is required for the prevention of precocious sister chromatid separation in meiosis I and for sister chromatid disjunction in meiosis II. Curr Genet. 2004 Aug;46(2):82-91. Epub 2004 Jul 6. PMID:15241623 doi:http://dx.doi.org/10.1007/s00294-004-0516-6
- ↑ Guo Q, Tao Y, Liu H, Teng M, Li X. Structural insights into the role of the Chl4-Iml3 complex in kinetochore assembly. Acta Crystallogr D Biol Crystallogr. 2013 Dec;69(Pt 12):2412-9. doi:, 10.1107/S0907444913022397. Epub 2013 Nov 19. PMID:24311582 doi:http://dx.doi.org/10.1107/S0907444913022397
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