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2cge

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Revision as of 11:00, 26 February 2020

Crystal structure of an Hsp90-Sba1 closed chaperone complex

Structural highlights

2cge is a 3 chain structure with sequence from Atcc 18824. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1a4h, 1ah6, 1ah8, 1am1, 1amw, 1bgq, 1hk7, 1us7, 1usu, 1usv, 2akp, 2brc, 2bre, 2cg9
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[HSP82_YEAST] Molecular chaperone that promotes the maturation, structural maintenance and proper regulation of specific target proteins involved in cell cycle control and signal transduction. Undergoes a functional cycle that is linked to its ATPase activity. The nucleotide-free form of the dimer is found in an open conformation in which the N-termini are not dimerized and the complex is ready for client protein binding. Binding of ATP induces large conformational changes, resulting in the formation of a ring-like closed structure in which the N-terminal domains associate intramolecularly with the middle domain and also dimerize with each other, stimulating their intrinsic ATPase activity and acting as a clamp on the substrate. Finally, ATP hydrolysis results in the release of the substrate. This cycle probably induces conformational changes in the client proteins, thereby causing their activation. Interacts dynamically with various co-chaperones that modulate its substrate recognition, ATPase cycle and chaperone function. Required for growth at high temperatures.^[1]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Hsp90 (heat shock protein of 90 kDa) is a ubiquitous molecular chaperone responsible for the assembly and regulation of many eukaryotic signalling systems and is an emerging target for rational chemotherapy of many cancers. Although the structures of isolated domains of Hsp90 have been determined, the arrangement and ATP-dependent dynamics of these in the full Hsp90 dimer have been elusive and contentious. Here we present the crystal structure of full-length yeast Hsp90 in complex with an ATP analogue and the co-chaperone p23/Sba1. The structure reveals the complex architecture of the 'closed' state of the Hsp90 chaperone, the extensive interactions between domains and between protein chains, the detailed conformational changes in the amino-terminal domain that accompany ATP binding, and the structural basis for stabilization of the closed state by p23/Sba1. Contrary to expectations, the closed Hsp90 would not enclose its client proteins but provides a bipartite binding surface whose formation and disruption are coupled to the chaperone ATPase cycle.

Crystal structure of an Hsp90-nucleotide-p23/Sba1 closed chaperone complex.,Ali MM, Roe SM, Vaughan CK, Meyer P, Panaretou B, Piper PW, Prodromou C, Pearl LH Nature. 2006 Apr 20;440(7087):1013-7. PMID:16625188^[2]

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

References

↑ Proisy N, Sharp SY, Boxall K, Connelly S, Roe SM, Prodromou C, Slawin AM, Pearl LH, Workman P, Moody CJ. Inhibition of Hsp90 with synthetic macrolactones: synthesis and structural and biological evaluation of ring and conformational analogs of radicicol. Chem Biol. 2006 Nov;13(11):1203-15. PMID:17114002 doi:10.1016/j.chembiol.2006.09.015
↑ Ali MM, Roe SM, Vaughan CK, Meyer P, Panaretou B, Piper PW, Prodromou C, Pearl LH. Crystal structure of an Hsp90-nucleotide-p23/Sba1 closed chaperone complex. Nature. 2006 Apr 20;440(7087):1013-7. PMID:16625188 doi:10.1038/nature04716

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2cge"

@@ Line 1: / Line 1: @@
 ==Crystal structure of an Hsp90-Sba1 closed chaperone complex==
-<StructureSection load='2cge' size='340' side='right' caption='[[2cge]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
+<StructureSection load='2cge' size='340' side='right'caption='[[2cge]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[2cge]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2CGE OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2CGE FirstGlance]. <br>
@@ Line 30: / Line 30: @@
 ==See Also==
-*[[Heat Shock Proteins|Heat Shock Proteins]]
+*[[Heat Shock Protein structures|Heat Shock Protein structures]]
 == References ==
 <references/>
@@ Line 36: / Line 36: @@
 </StructureSection>
 [[Category: Atcc 18824]]
+[[Category: Large Structures]]
 [[Category: Ali, M M.U]]
 [[Category: Pearl, L H]]

2cge

From Proteopedia

Revision as of 11:00, 26 February 2020

Crystal structure of an Hsp90-Sba1 closed chaperone complex

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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