Please use this identifier to cite or link to this item: https://doi.org/10.1002/bit.24632
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dc.titleEngineering of recombinant E. coli cells co-expressing P450pyrTM monooxygenase and glucose dehydrogenase for highly regio- and stereoselective hydroxylation of alicycles with cofactor recycling
dc.contributor.authorPham, S.Q.
dc.contributor.authorGao, P.
dc.contributor.authorLi, Z.
dc.date.accessioned2014-10-09T06:46:55Z
dc.date.available2014-10-09T06:46:55Z
dc.date.issued2013-02
dc.identifier.citationPham, S.Q., Gao, P., Li, Z. (2013-02). Engineering of recombinant E. coli cells co-expressing P450pyrTM monooxygenase and glucose dehydrogenase for highly regio- and stereoselective hydroxylation of alicycles with cofactor recycling. Biotechnology and Bioengineering 110 (2) : 363-373. ScholarBank@NUS Repository. https://doi.org/10.1002/bit.24632
dc.identifier.issn00063592
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/88842
dc.description.abstractE. coli (P450pyrTM-GDH) with dual plasmids, pETDuet containing P450pyr triple mutant I83H/M305Q/A77S (P450pyrTM) and ferredoxin reductase (FdR) genes and pRSFDuet containing glucose dehydrogenase (GDH) and ferredoxin (Fdx) genes, was engineered to show a high activity (12.7Ug-1cdw) for the biohydroxylation of N-benzylpyrrolidine 1 and a GDH activity of 106Ug-1 protein. The E. coli cells were used as efficient biocatalysts for highly regio- and stereoselective hydroxylation of alicyclic substrates at non-activated carbon atom with enhanced productivity via intracellular recycling of NAD(P)H. Hydroxylation of N-benzylpyrrolidine 1 with resting cells in the presence of glucose showed excellent regio- and stereoselectivity, giving (S)-N-benzyl-3-hydroxypyrrolidine 2 in 98% ee as the sole product in 9.8mM. The productivity is much higher than that of the same biohydroxylation using E. coli (P450pyrTM)b without expressing GDH. E. coli (P450pyrTM-GDH) was found to be highly regio- and stereoselective for the hydroxylation of N-benzylpyrrolidin-2-one 3, improving the regioselectivity from 90% of the wild-type P450pyr to 100% and giving (S)-N-benzyl-4-hydroxylpyrrolidin-2-one 4 in 99% ee as the sole product. A high activity of 15.5Ug-1cdw was achieved and (S)-4 was obtained in 19.4mM. E. coli (P450pyrTM-GDH) was also found to be highly regio- and stereoselective for the hydroxylation of N-benzylpiperidin-2-one 5, increasing the ee of the product (S)-N-benzyl-4-hydroxy-piperidin-2-one 6 to 94% from 33% of the wild-type P450pyr. A high activity of 15.8Ug-1cdw was obtained and (S)-6 was produced in 3.3mM as the sole product. E. coli (P450pyrTM-GDH) represents the most productive system known thus far for P450-catalyzed hydroxylations with cofactor recycling, and the hydroxylations with E. coli (P450pyrTM-GDH) provide with simple and useful syntheses of (S)-2, (S)-4, and (S)-6 that are valuable pharmaceutical intermediates and difficult to prepare. © 2012 Wiley Periodicals, Inc.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1002/bit.24632
dc.sourceScopus
dc.subjectCofactor regeneration
dc.subjectEnantioselectivity
dc.subjectHydroxylation
dc.subjectP450 monooxygenase
dc.subjectRegioselectivity
dc.subjectWhole-cell biocatalysis
dc.typeArticle
dc.contributor.departmentCHEMICAL & BIOMOLECULAR ENGINEERING
dc.description.doi10.1002/bit.24632
dc.description.sourcetitleBiotechnology and Bioengineering
dc.description.volume110
dc.description.issue2
dc.description.page363-373
dc.description.codenBIBIA
dc.identifier.isiut000312945800002
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