1vzy: Difference between revisions

Revision as of 16:39, 21 February 2008

CRYSTAL STRUCTURE OF THE BACILLUS SUBTILIS HSP33

OverviewOverview

The bacterial heat shock protein Hsp33 is a redox-regulated chaperone activated by oxidative stress. In response to oxidation, four cysteines within a Zn2+ binding C-terminal domain form two disulfide bonds with concomitant release of the metal. This leads to the formation of the biologically active Hsp33 dimer. The crystal structure of the N-terminal domain of the E. coli protein has been reported, but neither the structure of the Zn2+ binding motif nor the nature of its regulatory interaction with the rest of the protein are known. Here we report the crystal structure of the full-length B. subtilis Hsp33 in the reduced form. The structure of the N-terminal, dimerization domain is similar to that of the E. coli protein, although there is no domain swapping. The Zn2+ binding domain is clearly resolved showing the details of the tetrahedral coordination of Zn2+ by four thiolates. We propose a structure-based activation pathway for Hsp33.

About this StructureAbout this Structure

1VZY is a Single protein structure of sequence from Bacillus subtilis with and as ligands. Known structural/functional Site: . Full crystallographic information is available from OCA.

ReferenceReference

The crystal structure of the reduced, Zn2+-bound form of the B. subtilis Hsp33 chaperone and its implications for the activation mechanism., Janda I, Devedjiev Y, Derewenda U, Dauter Z, Bielnicki J, Cooper DR, Graf PC, Joachimiak A, Jakob U, Derewenda ZS, Structure. 2004 Oct;12(10):1901-7. PMID:15458638

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@@ Line 4: / Line 4: @@
 ==Overview==
-The bacterial heat shock protein Hsp33 is a redox-regulated chaperone, activated by oxidative stress. In response to oxidation, four cysteines, within a Zn2+ binding C-terminal domain form two disulfide bonds with, concomitant release of the metal. This leads to the formation of the, biologically active Hsp33 dimer. The crystal structure of the N-terminal, domain of the E. coli protein has been reported, but neither the structure, of the Zn2+ binding motif nor the nature of its regulatory interaction, with the rest of the protein are known. Here we report the crystal, structure of the full-length B. subtilis Hsp33 in the reduced form. The, structure of the N-terminal, dimerization domain is similar to that of the, E. coli protein, although there is no domain swapping. The Zn2+ binding, domain is clearly resolved showing the details of the tetrahedral, coordination of Zn2+ by four thiolates. We propose a structure-based, activation pathway for Hsp33.
+The bacterial heat shock protein Hsp33 is a redox-regulated chaperone activated by oxidative stress. In response to oxidation, four cysteines within a Zn2+ binding C-terminal domain form two disulfide bonds with concomitant release of the metal. This leads to the formation of the biologically active Hsp33 dimer. The crystal structure of the N-terminal domain of the E. coli protein has been reported, but neither the structure of the Zn2+ binding motif nor the nature of its regulatory interaction with the rest of the protein are known. Here we report the crystal structure of the full-length B. subtilis Hsp33 in the reduced form. The structure of the N-terminal, dimerization domain is similar to that of the E. coli protein, although there is no domain swapping. The Zn2+ binding domain is clearly resolved showing the details of the tetrahedral coordination of Zn2+ by four thiolates. We propose a structure-based activation pathway for Hsp33.
 ==About this Structure==
@@ Line 14: / Line 14: @@
 [[Category: Single protein]]
 [[Category: Bielnicki, J.]]
-[[Category: Cooper, D.R.]]
+[[Category: Cooper, D R.]]
 [[Category: Dauter, Z.]]
 [[Category: Derewenda, U.]]
-[[Category: Derewenda, Z.S.]]
+[[Category: Derewenda, Z S.]]
 [[Category: Devedjiev, Y.]]
-[[Category: Janda, I.K.]]
+[[Category: Janda, I K.]]
 [[Category: Joachimiak, A.]]
-[[Category: MCSG, Midwest.Center.for.Structural.Genomics.]]
+[[Category: MCSG, Midwest Center for Structural Genomics.]]
 [[Category: ACT]]
 [[Category: ZN]]
@@ Line 33: / Line 33: @@
 [[Category: redox-active center]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Feb  3 10:17:39 2008''
+''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 15:39:02 2008''