Journal article
The rubredoxin from Clostridium pasteurianum: Mutation of the conserved glycine residues 10 and 43 to alanine and valine
M Ayhan, ZG Xiao, MJ Lavery, AM Hamer, KW Nugent, SDB Scrofani, M Guss, AG Wedd
INORGANIC CHEMISTRY | AMER CHEMICAL SOC | Published : 1996
DOI: 10.1021/ic951653x
Abstract
Conserved glycine residues at positions 10 and 43 in the electron transfer protein rubredoxin (active site: Fe-(Cys-S)4) from Clostridium pasteurianum are related by a pseudo-2-fold symmetry. They have been mutated to alanine and valine and four single and two double mutant (G10V/G43A and G10V/G43V) proteins expressed in stable form in Escherichia coli. Physical properties were modified by steric interactions between the β- and γ-carbon substituents of the new side chains and the CO functions of C9 and C42 and other adjacent groups. These interactions perturb the chelate loops formed by residues 5-11 and 38-44. 1H NMR results for Cd(II) forms indicate that the Pr side chain of V10 in the G10..
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