Journal
CHEMBIOCHEM
Volume 18, Issue 23, Pages 2323-2327Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cbic.201700469
Keywords
alkylation; natural products; prenyltransferases; sirodesmin; unnatural donors
Funding
- University of Oklahoma
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Natural product prenyltransferases are known to display relaxed acceptor substrate specificity. Although recent studies with a small set of unnatural alkyl donors have revealed that prenyltransferases are flexible with regard to their alkyl donors, the scope of their alkyl donor specificity remains poorly understood. Towards this goal, we report the synthesis of 20 unnatural alkyl pyrophosphate donors and an assessment of the reactions of these synthetic unnatural alkyl pyrophosphate analogues catalyzed by tyrosine O-prenyltransferase SirD. This study demonstrates that SirD can utilize 16 out of 21 alkyl pyrophosphate analogues (including the natural donor) in catalyzing mostly O-alkylation of l-tyrosine. This study reveals the broad alkyl donor specificity of SirD and opens the door for the interrogation of the alkyl donor specificity of other prenyltransferases for potential utility as biocatalysts for differential alkylation applications.
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