View source for 3cob


==Structural Dynamics of the Microtubule binding and regulatory elements in the Kinesin-like Calmodulin binding protein==
<StructureSection load='3cob' size='340' side='right'caption='[[3cob]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3cob]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Solanum_tuberosum Solanum tuberosum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3COB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3COB FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></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=3cob FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3cob OCA], [https://pdbe.org/3cob PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3cob RCSB], [https://www.ebi.ac.uk/pdbsum/3cob PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3cob ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q41460_SOLTU Q41460_SOLTU] 
== 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/co/3cob_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=3cob ConSurf].
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== Publication Abstract from PubMed ==
Kinesins are molecular motors that power cell division and transport of various proteins and organelles. Their motor activity is driven by ATP hydrolysis and depends on interactions with microtubule tracks. Essential steps in kinesin movement rely on controlled alternate binding to and detaching from the microtubules. The conformational changes in the kinesin motors induced by nucleotide and microtubule binding are coordinated by structural elements within their motor domains. Loop L11 of the kinesin motor domain interacts with the microtubule and is implicated in both microtubule binding and sensing nucleotide bound to the active site of kinesin. Consistent with its proposed role as a microtubule sensor, loop L11 is rarely seen in crystal structures of unattached kinesins. Here, we report four structures of a regulated plant kinesin, the kinesin-like calmodulin binding protein (KCBP), determined by X-ray crystallography. Although all structures reveal the kinesin motor in the ATP-like conformation, its loop L11 is observed in different conformational states, both ordered and disordered. When structured, loop L11 adds three additional helical turns to the N-terminal part of the following helix alpha4. Although interactions with protein neighbors in the crystal support the ordering of loop L11, its observed conformation suggests the conformation for loop L11 in the microtubule-bound kinesin. Variations in the positions of other features of these kinesins were observed. A critical regulatory element of this kinesin, the calmodulin binding helix positioned at the C-terminus of the motor domain, is thought to confer negative regulation of KCBP. Calmodulin binds to this helix and inserts itself between the motor and the microtubule. Comparison of five independent structures of KCBP shows that the positioning of the calmodulin binding helix is not decided by crystal packing forces but is determined by the conformational state of the motor. The observed variations in the position of the calmodulin binding helix fit the regulatory mechanism previously proposed for this kinesin motor.

Structural dynamics of the microtubule binding and regulatory elements in the kinesin-like calmodulin binding protein.,Vinogradova MV, Malanina GG, Reddy VS, Reddy AS, Fletterick RJ J Struct Biol. 2008 Jul;163(1):76-83. Epub 2008 May 5. PMID:18513992<ref>PMID:18513992</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 3cob" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Solanum tuberosum]]
[[Category: Fletterick RJ]]
[[Category: Malanina GG]]
[[Category: Reddy ASN]]
[[Category: Reddy V]]
[[Category: Vinogradova MV]]