This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

2h19

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 08:04, 18 October 2017

Crystal Structure of ResA Cys77Ala Variant

Structural highlights

2h19 is a 2 chain structure with sequence from "bacillus_globigii"_migula_1900 "bacillus globigii" migula 1900. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	1su9, 1st9, 2h1a, 2h1b, 2h1d, 2h1g
Gene:	resA ("Bacillus globigii" Migula 1900)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[RESA_BACSU] Thiol-disulfide oxidoreductase which is required in disulfide reduction during c-type cytochrome synthesis. May accept reducing equivalents from CcdA, leading to breakage of disulfide bonds in apocytochrome c; following this reduction heme can be covalently attached. Does not play a role in sporulation.^[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

ResA, an extracytoplasmic thioredoxin from Bacillus subtilis, acts in cytochrome c maturation by reducing the disulfide bond present in apocytochromes prior to covalent attachment of heme. This reaction is (and has to be) specific, as broad substrate specificity would result in unproductive shortcircuiting with the general oxidizing thioredoxin(s) present in the same compartment. Using mutational analysis and subsequent biochemical and structural characterization of active site variants, we show that reduced ResA displays unusually low reactivity at neutral pH, consistent with the observed high pKa values>8 for both active site cysteines. Residue Glu80 is shown to play a key role in controlling the acid-base properties of the active site. A model in which substrate binding dramatically enhances the reactivity of the active site cysteines is proposed to account for the specificity of the protein. Such a substratemediated activation mechanism is likely to have wide relevance for extracytoplasmic thioredoxins.

Molecular basis for specificity of the extracytoplasmic thioredoxin ResA.,Lewin A, Crow A, Oubrie A, Le Brun NE J Biol Chem. 2006 Nov 17;281(46):35467-77. Epub 2006 Sep 13. PMID:16971393^[2]

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

References

↑ Erlendsson LS, Acheson RM, Hederstedt L, Le Brun NE. Bacillus subtilis ResA is a thiol-disulfide oxidoreductase involved in cytochrome c synthesis. J Biol Chem. 2003 May 16;278(20):17852-8. Epub 2003 Mar 7. PMID:12637552 doi:http://dx.doi.org/10.1074/jbc.M300103200
↑ Lewin A, Crow A, Oubrie A, Le Brun NE. Molecular basis for specificity of the extracytoplasmic thioredoxin ResA. J Biol Chem. 2006 Nov 17;281(46):35467-77. Epub 2006 Sep 13. PMID:16971393 doi:10.1074/jbc.M607047200

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2h19"

@@ Line 1: / Line 1: @@
 ==Crystal Structure of ResA Cys77Ala Variant==
 <StructureSection load='2h19' size='340' side='right' caption='[[2h19]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1su9|1su9]], [[1st9|1st9]], [[2h1a|2h1a]], [[2h1b|2h1b]], [[2h1d|2h1d]], [[2h1g|2h1g]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">resA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1423 "Bacillus globigii" Migula 1900])</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=2h19 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2h19 OCA], [http://pdbe.org/2h19 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2h19 RCSB], [http://www.ebi.ac.uk/pdbsum/2h19 PDBsum]</span></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=2h19 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2h19 OCA], [http://pdbe.org/2h19 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2h19 RCSB], [http://www.ebi.ac.uk/pdbsum/2h19 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2h19 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 29: / Line 30: @@
 </div>
 <div class="pdbe-citations 2h19" style="background-color:#fffaf0;"></div>
-==See Also==
-*[[Protein disulfide oxidoreductase|Protein disulfide oxidoreductase]]
 == References ==
 <references/>

2h19

From Proteopedia

Revision as of 08:04, 18 October 2017

Crystal Structure of ResA Cys77Ala Variant

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox