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1ags
From Proteopedia
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'''A SURFACE MUTANT (G82R) OF A HUMAN ALPHA-GLUTATHIONE S-TRANSFERASE SHOWS DECREASED THERMAL STABILITY AND A NEW MODE OF MOLECULAR ASSOCIATION IN THE CRYSTAL''' | '''A SURFACE MUTANT (G82R) OF A HUMAN ALPHA-GLUTATHIONE S-TRANSFERASE SHOWS DECREASED THERMAL STABILITY AND A NEW MODE OF MOLECULAR ASSOCIATION IN THE CRYSTAL''' | ||
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[[Category: Wang, B C.]] | [[Category: Wang, B C.]] | ||
[[Category: Zeng, K.]] | [[Category: Zeng, K.]] | ||
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Revision as of 07:15, 2 May 2008
A SURFACE MUTANT (G82R) OF A HUMAN ALPHA-GLUTATHIONE S-TRANSFERASE SHOWS DECREASED THERMAL STABILITY AND A NEW MODE OF MOLECULAR ASSOCIATION IN THE CRYSTAL
Overview
A chimeric enzyme (GST121) of the human alpha-glutathione S-transferases GST1-1 and GST2-2, which has improved catalytic efficiency and thermostability from its wild-type parent proteins, has been crystallized in a space group that is isomorphous with that reported for crystals of GST1-1. However, a single-site (G82R) mutant of GST121, which exhibits a significant reduction both in vitro and in vivo in protein thermostability, forms crystals that are not isomorphous with GST1-1. The mutant protein crystallizes in space group P2(1)2(1)2(1), with cell dimensions a = 49.5, b = 92.9, c = 115.9 A, and one dimer per asymmetric unit. Preliminary crystallographic results show that a mutation of the surface residue Gly 82 from a neutral to a charged residue causes new salt bridges to be formed among the GST dimers, suggesting that the G82R mutant might aggregate more readily than does GST121 in solution, resulting in a change of its solution properties.
About this Structure
1AGS is a Single protein structure of sequence from Synthetic construct. Full crystallographic information is available from OCA.
Reference
A surface mutant (G82R) of a human alpha-glutathione S-transferase shows decreased thermal stability and a new mode of molecular association in the crystal., Zeng K, Rose JP, Chen HC, Strickland CL, Tu CP, Wang BC, Proteins. 1994 Nov;20(3):259-63. PMID:7892174 Page seeded by OCA on Fri May 2 10:15:01 2008
