5ezy

From Proteopedia

(Difference between revisions)

Revision as of 07:53, 29 April 2020

Crystal structure of T2R-TTL-taccalonolide AJ complex

Structural highlights

5ezy is a 6 chain structure with sequence from [1], Bos taurus and Sus scrofa. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , , , , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[TBA1B_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. [STMN4_RAT] Exhibits microtubule-destabilizing activity.^[1] ^[2] ^[3] [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).

Publication Abstract from PubMed

As a major component of the cytoskeleton, microtubules consist of alphabeta-tubulin heterodimers and have been recognized as attractive targets for cancer chemotherapy. Microtubule-stabilizing agents (MSAs) promote polymerization of tubulin and stabilize the polymer, preventing depolymerization. The molecular mechanisms by which MSAs stabilize microtubules remain elusive. Here we report a 2.05 A crystal structure of tubulin complexed with taccalonolide AJ, a newly identified taxane-site MSA. Taccalonolide AJ covalently binds to beta-tubulin D226. On AJ binding, the M-loop undergoes a conformational shift to facilitate tubulin polymerization. In this tubulin-AJ complex, the E-site of tubulin is occupied by GTP rather than GDP. Biochemical analyses confirm that AJ inhibits the hydrolysis of the E-site GTP. Thus, we propose that the beta-tubulin E-site is locked into a GTP-preferred status by AJ binding. Our results provide experimental evidence for the connection between MSA binding and tubulin nucleotide state, and will help design new MSAs to overcome taxane resistance.

Mechanism of microtubule stabilization by taccalonolide AJ.,Wang Y, Yu Y, Li GB, Li SA, Wu C, Gigant B, Qin W, Chen H, Wu Y, Chen Q, Yang J Nat Commun. 2017 Jun 6;8:15787. doi: 10.1038/ncomms15787. PMID:28585532^[4]

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

References

↑ Nakao C, Itoh TJ, Hotani H, Mori N. Modulation of the stathmin-like microtubule destabilizing activity of RB3, a neuron-specific member of the SCG10 family, by its N-terminal domain. J Biol Chem. 2004 May 28;279(22):23014-21. Epub 2004 Mar 22. PMID:15039434 doi:http://dx.doi.org/10.1074/jbc.M313693200
↑ Gavet O, El Messari S, Ozon S, Sobel A. Regulation and subcellular localization of the microtubule-destabilizing stathmin family phosphoproteins in cortical neurons. J Neurosci Res. 2002 Jun 1;68(5):535-50. PMID:12111843 doi:http://dx.doi.org/10.1002/jnr.10234
↑ Ravelli RB, Gigant B, Curmi PA, Jourdain I, Lachkar S, Sobel A, Knossow M. Insight into tubulin regulation from a complex with colchicine and a stathmin-like domain. Nature. 2004 Mar 11;428(6979):198-202. PMID:15014504 doi:http://dx.doi.org/10.1038/nature02393
↑ Wang Y, Yu Y, Li GB, Li SA, Wu C, Gigant B, Qin W, Chen H, Wu Y, Chen Q, Yang J. Mechanism of microtubule stabilization by taccalonolide AJ. Nat Commun. 2017 Jun 6;8:15787. doi: 10.1038/ncomms15787. PMID:28585532 doi:http://dx.doi.org/10.1038/ncomms15787

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5ezy"

@@ Line 1: / Line 1: @@
 ==Crystal structure of T2R-TTL-taccalonolide AJ complex==
-<StructureSection load='5ezy' size='340' side='right' caption='[[5ezy]], [[Resolution|resolution]] 2.05&Aring;' scene=''>
+<StructureSection load='5ezy' size='340' side='right'caption='[[5ezy]], [[Resolution|resolution]] 2.05&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5ezy]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/ ], [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus] 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=5EZY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5EZY FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5ezy]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/ ], [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus] 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=5EZY OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5EZY 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=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene>, <scene name='pdbligand=MES:2-(N-MORPHOLINO)-ETHANESULFONIC+ACID'>MES</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=TAJ:TACCALONOLIDE+AJ'>TAJ</scene></td></tr>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACP:PHOSPHOMETHYLPHOSPHONIC+ACID+ADENYLATE+ESTER'>ACP</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene>, <scene name='pdbligand=MES:2-(N-MORPHOLINO)-ETHANESULFONIC+ACID'>MES</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=TAJ:TACCALONOLIDE+AJ'>TAJ</scene></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=5ezy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5ezy OCA], [http://pdbe.org/5ezy PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5ezy RCSB], [http://www.ebi.ac.uk/pdbsum/5ezy PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5ezy 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=5ezy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5ezy OCA], [http://pdbe.org/5ezy PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5ezy RCSB], [http://www.ebi.ac.uk/pdbsum/5ezy PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5ezy ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 18: / Line 18: @@
 </div>
 <div class="pdbe-citations 5ezy" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Stathmin-4 3D structures|Stathmin-4 3D structures]]
+*[[Tubulin 3D Structures|Tubulin 3D Structures]]
 == References ==
 <references/>
@@ Line 23: / Line 27: @@
 </StructureSection>
 [[Category: Bos taurus]]
+[[Category: Large Structures]]
 [[Category: Sus scrofa]]
 [[Category: Chen, Q]]

5ezy

From Proteopedia

Revision as of 07:53, 29 April 2020

Crystal structure of T2R-TTL-taccalonolide AJ complex

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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