View source for 1ia0


==KIF1A HEAD-MICROTUBULE COMPLEX STRUCTURE IN ATP-FORM==
<SX load='1ia0' size='340' side='right' viewer='molstar' caption='[[1ia0]], [[Resolution|resolution]] 15.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1ia0]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice] and [http://en.wikipedia.org/wiki/Sus_scrofa Sus scrofa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IA0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1IA0 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACP:PHOSPHOMETHYLPHOSPHONIC+ACID+ADENYLATE+ESTER'>ACP</scene>, <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=TXL:TAXOTERE'>TXL</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1tub|1tub]], [[1i6i|1i6i]], [[2hxf|2hxf]]</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">KIF1A ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</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=1ia0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ia0 OCA], [http://pdbe.org/1ia0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ia0 RCSB], [http://www.ebi.ac.uk/pdbsum/1ia0 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1ia0 ProSAT]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/TBA1A_PIG TBA1A_PIG]] 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/KIF1A_MOUSE KIF1A_MOUSE]] Motor for anterograde axonal transport of synaptic vesicle precursors. [[http://www.uniprot.org/uniprot/TBB_PIG TBB_PIG]] 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. 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ia/1ia0_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1ia0 ConSurf].
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== Publication Abstract from PubMed ==
Kinesin motors are specialized enzymes that use hydrolysis of ATP to generate force and movement along their cellular tracks, the microtubules. Although numerous biochemical and biophysical studies have accumulated much data that link microtubule-assisted ATP hydrolysis to kinesin motion, the structural view of kinesin movement remains unclear. This study of the monomeric kinesin motor KIF1A combines X-ray crystallography and cryo-electron microscopy, and allows analysis of force-generating conformational changes at atomic resolution. The motor is revealed in its two functionally critical states-complexed with ADP and with a non-hydrolysable analogue of ATP. The conformational change observed between the ADP-bound and the ATP-like structures of the KIF1A catalytic core is modular, extends to all kinesins and is similar to the conformational change used by myosin motors and G proteins. Docking of the ADP-bound and ATP-like crystallographic models of KIF1A into the corresponding cryo-electron microscopy maps suggests a rationale for the plus-end directional bias associated with the kinesin catalytic core.

Switch-based mechanism of kinesin motors.,Kikkawa M, Sablin EP, Okada Y, Yajima H, Fletterick RJ, Hirokawa N Nature. 2001 May 24;411(6836):439-45. PMID:11373668<ref>PMID:11373668</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1ia0" style="background-color:#fffaf0;"></div>

==See Also==
*[[Kinesin 3D Structures|Kinesin 3D Structures]]
*[[Tubulin|Tubulin]]
== References ==
<references/>
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</SX>
[[Category: Large Structures]]
[[Category: Lk3 transgenic mice]]
[[Category: Sus scrofa]]
[[Category: Fletterick, R J]]
[[Category: Hirokawa, N]]
[[Category: Kikkawa, M]]
[[Category: Okada, Y]]
[[Category: Sablin, E P]]
[[Category: Yajima, H]]
[[Category: Fitting of x-ray structures into cryo-em reconstruction]]
[[Category: Kif1a]]
[[Category: Microtubule]]
[[Category: Transport protein]]
[[Category: Tubulin]]