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| | <SX load='5hnx' size='340' side='right' viewer='molstar' caption='[[5hnx]], [[Resolution|resolution]] 6.60Å' scene=''> | | <SX load='5hnx' size='340' side='right' viewer='molstar' caption='[[5hnx]], [[Resolution|resolution]] 6.60Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5hnx]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus] and [http://en.wikipedia.org/wiki/Drome Drome]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5HNX OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5HNX FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5hnx]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus], [https://en.wikipedia.org/wiki/Drosophila_melanogaster Drosophila melanogaster] and [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5HNX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5HNX FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=TA1:TAXOL'>TA1</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 6.6Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5hnw|5hnw]], [[5hny|5hny]], [[5hnz|5hnz]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=TA1:TAXOL'>TA1</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ncd ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=7227 DROME])</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=5hnx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5hnx OCA], [https://pdbe.org/5hnx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5hnx RCSB], [https://www.ebi.ac.uk/pdbsum/5hnx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5hnx ProSAT]</span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5hnx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5hnx OCA], [http://pdbe.org/5hnx PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5hnx RCSB], [http://www.ebi.ac.uk/pdbsum/5hnx PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5hnx ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/TBA1B_BOVIN TBA1B_BOVIN]] Tubulin is the major constituent of microtubules. It binds two moles of GTP, one at an exchangeable site on the beta chain and one at a non-exchangeable site on the alpha chain. [[http://www.uniprot.org/uniprot/NCD_DROME NCD_DROME]] NCD is required for normal chromosomal segregation in meiosis, in females, and in early mitotic divisions of the embryo. The NCD motor activity is directed toward the microtubule's minus end.<ref>PMID:2146510</ref> [[http://www.uniprot.org/uniprot/TBB2B_BOVIN TBB2B_BOVIN]] Tubulin is the major constituent of microtubules. It binds two moles of GTP, one at an exchangeable site on the beta chain and one at a non-exchangeable site on the alpha chain (By similarity). | + | [https://www.uniprot.org/uniprot/TBA1B_BOVIN TBA1B_BOVIN] Tubulin is the major constituent of microtubules. It binds two moles of GTP, one at an exchangeable site on the beta chain and one at a non-exchangeable site on the alpha chain. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </SX> | | </SX> |
| | [[Category: Bos taurus]] | | [[Category: Bos taurus]] |
| - | [[Category: Drome]] | + | [[Category: Drosophila melanogaster]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Kikkawa, M]] | + | [[Category: Rattus norvegicus]] |
| - | [[Category: Nitta, R]] | + | [[Category: Kikkawa M]] |
| - | [[Category: Shigematsu, H]] | + | [[Category: Nitta R]] |
| - | [[Category: Shirouzu, M]] | + | [[Category: Shigematsu H]] |
| - | [[Category: Yokoyama, T]] | + | [[Category: Shirouzu M]] |
| - | [[Category: Atpase]]
| + | [[Category: Yokoyama T]] |
| - | [[Category: Kinesin]]
| + | |
| - | [[Category: Kinesin-14]]
| + | |
| - | [[Category: Microtubule]]
| + | |
| - | [[Category: Structural protein-motor protein complex]]
| + | |
| Structural highlights
Function
TBA1B_BOVIN Tubulin is the major constituent of microtubules. It binds two moles of GTP, one at an exchangeable site on the beta chain and one at a non-exchangeable site on the alpha chain.
Publication Abstract from PubMed
Kinesin-14 is a unique minus-end-directed microtubule-based motor. A swinging motion of a class-specific N-terminal neck helix has been proposed to produce minus-end directionality. However, it is unclear how swinging of the neck helix is driven by ATP hydrolysis utilizing the highly conserved catalytic core among all kinesins. Here, using a motility assay, we show that in addition to the neck helix, the conserved five residues at the C-terminal region in kinesin-14, namely the neck mimic, are necessary to give kinesin-1 an ability to reverse its directionality toward the minus end of microtubules. Our structural analyses further demonstrate that the C-terminal neck mimic, in cooperation with conformational changes in the catalytic core during ATP binding, forms a kinesin-14 bundle with the N-terminal neck helix to swing toward the minus end of microtubules. Thus, the neck mimic plays a crucial role in coupling the chemical ATPase reaction with the mechanical cycle to produce the minus-end-directed motility of kinesin-14.
Structural Basis of Backwards Motion in Kinesin-1-Kinesin-14 Chimera: Implication for Kinesin-14 Motility.,Yamagishi M, Shigematsu H, Yokoyama T, Kikkawa M, Sugawa M, Aoki M, Shirouzu M, Yajima J, Nitta R Structure. 2016 Aug 2;24(8):1322-34. doi: 10.1016/j.str.2016.05.021. Epub 2016, Jul 21. PMID:27452403[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Yamagishi M, Shigematsu H, Yokoyama T, Kikkawa M, Sugawa M, Aoki M, Shirouzu M, Yajima J, Nitta R. Structural Basis of Backwards Motion in Kinesin-1-Kinesin-14 Chimera: Implication for Kinesin-14 Motility. Structure. 2016 Aug 2;24(8):1322-34. doi: 10.1016/j.str.2016.05.021. Epub 2016, Jul 21. PMID:27452403 doi:http://dx.doi.org/10.1016/j.str.2016.05.021
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