Article
Histidine-alpha143 assists 1,2-hydroxyl group migration and protects radical intermediates in coenzyme B12-dependent diol dehydratase.
Biochemistry - 11 Mar 2008
Kinoshita Koichiro, Kawata Masahiro, Ogura Ken-ichi, Yamasaki Ai, Watanabe Takeshi, Komoto Noriaki, Hieda Naoki, Yamanishi Mamoru, Tobimatsu Takamasa, Toraya Tetsuo
Abstract excerpt
Diol dehydratase of Klebsiella oxytoca contains an essential histidine residue. Its X-ray structure revealed that the migrating hydroxyl group on C2 of substrate is hydrogen-bonded to Hisalpha143. Mutant enzymes in which Hisalpha143 was mutated to another amino acid residue were expressed in Esch...
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