| Structural highlights
Function
HCHA_ECOLI Functions as a holding molecular chaperone (holdase) which stabilizes unfolding intermediates and rapidly releases them in an active form once stress has abated. Plays an important role in protecting cells from severe heat shock and starvation, as well as in acid resistance of stationary-phase cells. It uses temperature-induced exposure of structured hydrophobic domains to capture and stabilizes early unfolding and denatured protein intermediates under severe thermal stress. Catalyzes the conversion of methylglyoxal (MG) to D-lactate in a single glutathione (GSH)-independent step. It can also use phenylglyoxal as substrate. Glyoxalase activity protects cells against dicarbonyl stress. Displays an aminopeptidase activity that is specific against peptide substrates with alanine or basic amino acids (lysine, arginine) at N-terminus.[1] [2] [3] [4] [5] [6] [7] [8]
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
Human DJ-1 and Escherichia coli Hsp31 belong to ThiJ/PfpI family, whose members contain a conserved domain. DJ-1 is associated with autosomal recessive early onset parkinsonism and Hsp31 is a molecular chaperone. Structural comparisons between DJ-1, Hsp31, and an Archaea protease, a member of ThiJ/PfpI family, lead to the identification of the chaperone activity of DJ-1 and the proteolytic activity of Hsp31. Moreover, the comparisons provide insights into how the functional diversity is realized in proteins that share an evolutionarily conserved domain. On the basis of the chaperone activity the possible role of DJ-1 in the pathogenesis of Parkinson's disease is discussed.
Crystal structures of human DJ-1 and Escherichia coli Hsp31, which share an evolutionarily conserved domain.,Lee SJ, Kim SJ, Kim IK, Ko J, Jeong CS, Kim GH, Park C, Kang SO, Suh PG, Lee HS, Cha SS J Biol Chem. 2003 Nov 7;278(45):44552-9. Epub 2003 Aug 25. PMID:12939276[9]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Misra K, Banerjee AB, Ray S, Ray M. Glyoxalase III from Escherichia coli: a single novel enzyme for the conversion of methylglyoxal into D-lactate without reduced glutathione. Biochem J. 1995 Feb 1;305 ( Pt 3):999-1003. PMID:7848303
- ↑ Sastry MS, Korotkov K, Brodsky Y, Baneyx F. Hsp31, the Escherichia coli yedU gene product, is a molecular chaperone whose activity is inhibited by ATP at high temperatures. J Biol Chem. 2002 Nov 29;277(48):46026-34. Epub 2002 Sep 15. PMID:12235139 doi:http://dx.doi.org/10.1074/jbc.M205800200
- ↑ Malki A, Kern R, Abdallah J, Richarme G. Characterization of the Escherichia coli YedU protein as a molecular chaperone. Biochem Biophys Res Commun. 2003 Feb 7;301(2):430-6. PMID:12565879
- ↑ Mujacic M, Bader MW, Baneyx F. Escherichia coli Hsp31 functions as a holding chaperone that cooperates with the DnaK-DnaJ-GrpE system in the management of protein misfolding under severe stress conditions. Mol Microbiol. 2004 Feb;51(3):849-59. PMID:14731284
- ↑ Malki A, Caldas T, Abdallah J, Kern R, Eckey V, Kim SJ, Cha SS, Mori H, Richarme G. Peptidase activity of the Escherichia coli Hsp31 chaperone. J Biol Chem. 2005 Apr 15;280(15):14420-6. Epub 2004 Nov 18. PMID:15550391 doi:http://dx.doi.org/10.1074/jbc.M408296200
- ↑ Mujacic M, Baneyx F. Regulation of Escherichia coli hchA, a stress-inducible gene encoding molecular chaperone Hsp31. Mol Microbiol. 2006 Jun;60(6):1576-89. PMID:16796689 doi:http://dx.doi.org/10.1111/j.1365-2958.2006.05207.x
- ↑ Mujacic M, Baneyx F. Chaperone Hsp31 contributes to acid resistance in stationary-phase Escherichia coli. Appl Environ Microbiol. 2007 Feb;73(3):1014-8. Epub 2006 Dec 8. PMID:17158627 doi:http://dx.doi.org/10.1128/AEM.02429-06
- ↑ Subedi KP, Choi D, Kim I, Min B, Park C. Hsp31 of Escherichia coli K-12 is glyoxalase III. Mol Microbiol. 2011 Aug;81(4):926-36. doi: 10.1111/j.1365-2958.2011.07736.x. Epub, 2011 Jul 6. PMID:21696459 doi:http://dx.doi.org/10.1111/j.1365-2958.2011.07736.x
- ↑ Lee SJ, Kim SJ, Kim IK, Ko J, Jeong CS, Kim GH, Park C, Kang SO, Suh PG, Lee HS, Cha SS. Crystal structures of human DJ-1 and Escherichia coli Hsp31, which share an evolutionarily conserved domain. J Biol Chem. 2003 Nov 7;278(45):44552-9. Epub 2003 Aug 25. PMID:12939276 doi:http://dx.doi.org/10.1074/jbc.M304517200
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