7lxb - Revision history

OCA at 19:38, 29 May 2024

OCA — Wed, 29 May 2024 19:38:39 GMT

←Older revision		Revision as of 19:38, 29 May 2024
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-	====	+	==HeLa-tubulin in complex with cryptophycin 52==
-	<StructureSection load='7lxb' size='340' side='right'caption='[[7lxb]]' scene=''>	+	<StructureSection load='7lxb' size='340' side='right'caption='[[7lxb]], [[Resolution\|resolution]] 3.26Å' scene=''>
	== Structural highlights ==		== Structural highlights ==
-	<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id= OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol= FirstGlance]. <br>	+	<table><tr><td colspan='2'>[[7lxb]] is a 16 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7LXB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7LXB FirstGlance]. <br>
-	</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=7lxb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7lxb OCA], [https://pdbe.org/7lxb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7lxb RCSB], [https://www.ebi.ac.uk/pdbsum/7lxb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7lxb ProSAT]</span></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]] 3.26Å</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=YGY:Cryptophycin+52'>YGY</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=7lxb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7lxb OCA], [https://pdbe.org/7lxb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7lxb RCSB], [https://www.ebi.ac.uk/pdbsum/7lxb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7lxb ProSAT]</span></td></tr>
	</table>		</table>
		+	== Function ==
		+	[https://www.uniprot.org/uniprot/TBA1B_HUMAN TBA1B_HUMAN] 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;">
		+	== Publication Abstract from PubMed ==
		+	Cryptophycin-52 (Cp-52) is potentially the most potent anticancer drug known, with IC(50) values in the low picomolar range, but its binding site on tubulin and mechanism of action are unknown. Here, we have determined the binding site of Cp-52, and its parent compound, cryptophycin-1, on HeLa tubulin, to a resolution of 3.3 A and 3.4 A, respectively, by cryo-EM and characterized this binding further by molecular dynamics simulations. The binding site was determined to be located at the tubulin interdimer interface and partially overlap that of maytansine, another cytotoxic tubulin inhibitor. Binding induces curvature both within and between tubulin dimers that is incompatible with the microtubule lattice. Conformational changes occur in both alpha-tubulin and beta-tubulin, particularly in helices H8 and H10, with distinct differences between alpha and beta monomers and between Cp-52-bound and cryptophycin-1-bound tubulin. From these results, we have determined: (i) the mechanism of action of inhibition of both microtubule polymerization and depolymerization, (ii) how the affinity of Cp-52 for tubulin may be enhanced, and (iii) where linkers for targeted delivery can be optimally attached to this molecule.
		+
		+	Conformational changes in tubulin upon binding cryptophycin-52 reveal its mechanism of action.,Eren E, Watts NR, Sackett DL, Wingfield PT J Biol Chem. 2021 Oct;297(4):101138. doi: 10.1016/j.jbc.2021.101138. Epub 2021 , Aug 28. PMID:34461087<ref>PMID:34461087</ref>
		+
		+	From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
		+	</div>
		+	<div class="pdbe-citations 7lxb" style="background-color:#fffaf0;"></div>
		+
		+	==See Also==
		+	*[[Tubulin 3D Structures\|Tubulin 3D Structures]]
		+	== References ==
		+	<references/>
	__TOC__		__TOC__
	</StructureSection>		</StructureSection>
		+	[[Category: Homo sapiens]]
	[[Category: Large Structures]]		[[Category: Large Structures]]
-	[[Category: ~~Z-disk~~]]	+	[[Category: Eren E]]

OCA at 08:58, 8 September 2021

OCA — Wed, 08 Sep 2021 08:58:08 GMT

←Older revision		Revision as of 08:58, 8 September 2021
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-	'''Unreleased structure'''

-	~~The entry~~ 7lxb ~~is ON HOLD until Paper Publication~~	+	====
-		+	<StructureSection load='7lxb' size='340' side='right'caption='[[7lxb]]' scene=''>
-	~~Authors~~: ~~Eren, E~~.	+	== Structural highlights ==
-		+	<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id= OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol= FirstGlance]. <br>
-	~~Description~~: ~~HeLa~~-~~tubulin in complex with cryptophycin 52~~	+	</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=7lxb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7lxb OCA], [https://pdbe.org/7lxb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7lxb RCSB], [https://www.ebi.ac.uk/pdbsum/7lxb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7lxb ProSAT]</span></td></tr>
-	[[Category: ~~Unreleased~~ Structures]]	+	</table>
-	[[Category: ~~Eren, E~~]]	+	__TOC__
		+	</StructureSection>
		+	[[Category: Large Structures]]
		+	[[Category: Z-disk]]

OCA at 05:30, 24 March 2021

OCA — Wed, 24 Mar 2021 05:30:39 GMT

←Older revision		Revision as of 05:30, 24 March 2021
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	'''Unreleased structure'''		'''Unreleased structure'''

-	The entry 7lxb is ON HOLD	+	The entry 7lxb is ON HOLD until Paper Publication

	Authors: Eren, E.		Authors: Eren, E.

OCA: Protected "7lxb" [edit=sysop:move=sysop]

OCA — Wed, 10 Mar 2021 14:49:03 GMT

Protected "7lxb" [edit=sysop:move=sysop]

←Older revision

Revision as of 14:49, 10 March 2021

OCA: New page: '''Unreleased structure''' The entry 7lxb is ON HOLD Authors: Eren, E. Description: HeLa-tubulin in complex with cryptophycin 52 Category: Unreleased Structures [[Category: Eren, E...

OCA — Wed, 10 Mar 2021 14:49:01 GMT

New page: '''Unreleased structure''' The entry 7lxb is ON HOLD Authors: Eren, E. Description: HeLa-tubulin in complex with cryptophycin 52 Category: Unreleased Structures [[Category: Eren, E...

New page

'''Unreleased structure'''

The entry 7lxb is ON HOLD

Authors: Eren, E.

Description: HeLa-tubulin in complex with cryptophycin 52
[[Category: Unreleased Structures]]
[[Category: Eren, E]]