2.1.1.14 C645A the mutation confers resistance to diamide when cells are grown in media lacking methionine, but not when cells are grown in the presence of methionine, cysteine 645 serves to modulate the activity of MetE in vivo in response to disulfide stress 704294 2.1.1.14 C726S mutant does not contain zinc, no activity, probably due to lack of zinc 441332 2.1.1.14 D113R mutation abrogate nuclear localization 757179 2.1.1.14 N126A 13% of wild-type activity -, 734490 2.1.1.14 R742A nuclear localization is abrogated by the deletion of 107 C-terminal amino acids or the R742A mutation 757179 2.1.1.14 V39A/R46C/T106I/K713E mutant confers accelerated growth in the Escherichia coli K-12 WE strain in the presence of acetate. Strains harboring acetate-tolerant MetE mutants are less inhibited by homocysteine in L-isoleucine-enriched medium. The acetate-tolerant MetE mutants stimulate the growth of the host strain at elevated temperatures of 44 and 45°C. The mutant MetE enzymes display a reduced melting temperature but an enhanced in vivo stability 733170 2.1.1.14 V39A/R46C/T106I/K713E/C645A C645A mutation additionally improves acetate tolerance. Strains harboring acetate-tolerant MetE mutants are less inhibited by homocysteine in L-isoleucine-enriched medium. The acetate-tolerant MetE mutants stimulate the growth of the host strain at elevated temperatures of 44 and 45°C. The mutant MetE enzymes display a reduced melting temperature but an enhanced in vivo stability 733170 2.1.1.14 Y660A no residual activity -, 734490 2.1.1.14 Y660F 93% of wild-type activity -, 734490 2.1.1.14 Y660Q 14% of wild-type activity -, 734490