Microscopic pKa values of Escherichia coli thioredoxin.


Thiol:disulfide oxidoreductases have a CXXC motif within their active sites. To initiate the reduction of a substrate disulfide bond, the thiolate form of the N-terminal cysteine residue (CXXC) of this motif performs a nucleophilic attack. Escherichia coli thioredoxin [Trx (CGPC)] is the best characterized thiol:disulfide oxidoreductase. Previous… (More)


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