期刊
JOURNAL OF BIOSCIENCE AND BIOENGINEERING
卷 103, 期 4, 页码 373-376出版社
SOC BIOSCIENCE BIOENGINEERING JAPAN
DOI: 10.1263/jbb.103.373
关键词
glutathione; disulfide reductase; Escherichia coli
An Escherichia coli cell-free protein synthesis cell extract has been created that lacks all known cytoplasmic disulfide reduction pathways but still retains significant reductase activity. Oxidized glutathione was partially stabilized by deleting the gene for glutathione reductase. To avoid previously reported AhpC mutations, thioredoxin reductase was only removed after extract preparation. The trxB gene was extended to encode a hemagglutinin tag so that TrxB could be removed by affinity adsorption. However, significant glutathione reductase activity remained. The unknown glutathione reductase pathway is disabled by iodoacetamide, is inhibited by NADH, and appears to use NADPH as an electron source.
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