Mechanistic study of the radical SAM-dependent amine dehydrogenation reactions

The radical SAM enzyme NosL catalyzes the conversion of L-Trp to 3-methyl-2-indolic acid, and this reaction is initiated by the 5'-deoxyadenosyl (dAdo) radical-mediated hydrogen abstraction from the L-Trp amino group. We demonstrate here that when D-Trp was used in the NosL reaction, hydrogen abstraction occurs promiscuously at both the amino group and C alpha of D-Trp. These results inspired us to establish the detailed mechanism of L-Trp amine dehydrogenation catalyzed by a NosL mutant, and to engineer a novel radical SAM-dependent L-Tyr amine dehydrogenase from the thiamine biosynthesis enzyme ThiH.


Published in:
Chemical Communications, 52, 69, 10555-10558
Year:
2016
Publisher:
Cambridge, Royal Soc Chemistry
ISSN:
1359-7345
Laboratories:




 Record created 2016-10-18, last modified 2018-09-13


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