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3lre

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Revision as of 08:37, 24 December 2014

Crystal Structure Analysis of Human Kinesin-8 Motor Domain

Structural highlights

3lre is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Gene:	KIF18A, OK/SW-cl.108 (Homo sapiens)
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[KI18A_HUMAN] Microtubule-depolymerizing kinesin which plays a role in chromosome congression by reducing the amplitude of preanaphase oscillations and slowing poleward movement during anaphase, thus suppressing chromosome movements. May stabilize the CENPE-BUB1B complex at the kinetochores during early mitosis and maintains CENPE levels at kinetochores during chromosome congression.^[1] ^[2] ^[3] ^[4]

Publication Abstract from PubMed

Members of the kinesin-8 motor class have the remarkable ability to both walk towards microtubule plus-ends and depolymerise these ends on arrival, thereby regulating microtubule length. To analyse how kinesin-8 multitasks, we studied the structure and function of the kinesin-8 motor domain. We determined the first crystal structure of a kinesin-8 and used cryo-electron microscopy to calculate the structure of the microtubule-bound motor. Microtubule-bound kinesin-8 reveals a new conformation compared with the crystal structure, including a bent conformation of the alpha4 relay helix and ordering of functionally important loops. The kinesin-8 motor domain does not depolymerise stabilised microtubules with ATP but does form tubulin rings in the presence of a non-hydrolysable ATP analogue. This shows that, by collaborating, kinesin-8 motor domain molecules can release tubulin from microtubules, and that they have a similar mechanical effect on microtubule ends as kinesin-13, which enables depolymerisation. Our data reveal aspects of the molecular mechanism of kinesin-8 motors that contribute to their unique dual motile and depolymerising functions, which are adapted to control microtubule length.

Insight into the molecular mechanism of the multitasking kinesin-8 motor.,Peters C, Brejc K, Belmont L, Bodey AJ, Lee Y, Yu M, Guo J, Sakowicz R, Hartman J, Moores CA EMBO J. 2010 Oct 20;29(20):3437-47. Epub 2010 Sep 3. PMID:20818331^[5]

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

References

↑ Mayr MI, Hummer S, Bormann J, Gruner T, Adio S, Woehlke G, Mayer TU. The human kinesin Kif18A is a motile microtubule depolymerase essential for chromosome congression. Curr Biol. 2007 Mar 20;17(6):488-98. Epub 2007 Mar 8. PMID:17346968 doi:10.1016/j.cub.2007.02.036
↑ Stumpff J, von Dassow G, Wagenbach M, Asbury C, Wordeman L. The kinesin-8 motor Kif18A suppresses kinetochore movements to control mitotic chromosome alignment. Dev Cell. 2008 Feb;14(2):252-62. doi: 10.1016/j.devcel.2007.11.014. PMID:18267093 doi:10.1016/j.devcel.2007.11.014
↑ Gardner MK, Odde DJ, Bloom K. Kinesin-8 molecular motors: putting the brakes on chromosome oscillations. Trends Cell Biol. 2008 Jul;18(7):307-10. doi: 10.1016/j.tcb.2008.05.003. Epub, 2008 May 29. PMID:18513970 doi:10.1016/j.tcb.2008.05.003
↑ Huang Y, Yao Y, Xu HZ, Wang ZG, Lu L, Dai W. Defects in chromosome congression and mitotic progression in KIF18A-deficient cells are partly mediated through impaired functions of CENP-E. Cell Cycle. 2009 Aug 15;8(16):2643-9. Epub 2009 Aug 29. PMID:19625775
↑ Peters C, Brejc K, Belmont L, Bodey AJ, Lee Y, Yu M, Guo J, Sakowicz R, Hartman J, Moores CA. Insight into the molecular mechanism of the multitasking kinesin-8 motor. EMBO J. 2010 Oct 20;29(20):3437-47. Epub 2010 Sep 3. PMID:20818331 doi:10.1038/emboj.2010.220

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

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

@@ Line 7: / Line 7: @@
 <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=3lre FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3lre OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3lre RCSB], [http://www.ebi.ac.uk/pdbsum/3lre PDBsum]</span></td></tr>
 </table>
+== Function ==
+[[http://www.uniprot.org/uniprot/KI18A_HUMAN KI18A_HUMAN]] Microtubule-depolymerizing kinesin which plays a role in chromosome congression by reducing the amplitude of preanaphase oscillations and slowing poleward movement during anaphase, thus suppressing chromosome movements. May stabilize the CENPE-BUB1B complex at the kinetochores during early mitosis and maintains CENPE levels at kinetochores during chromosome congression.<ref>PMID:17346968</ref> <ref>PMID:18267093</ref> <ref>PMID:18513970</ref> <ref>PMID:19625775</ref>
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==

3lre

From Proteopedia

Revision as of 08:37, 24 December 2014

Crystal Structure Analysis of Human Kinesin-8 Motor Domain

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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