Engineering a Cytochrome P450 for Demethylation of Lignin-Derived Aromatic Aldehydes.
Engineering a Cytochrome P450 for Demethylation of Lignin-Derived Aromatic Aldehydes.
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DOI:
10.1021/jacsau.0c00103
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发表时间:
2021-03-22
期刊:
影响因子:
8
通讯作者:
DuBois JL
中科院分区:
文献类型:
--
作者:
Ellis ES;Hinchen DJ;Bleem A;Bu L;Mallinson SJB;Allen MD;Streit BR;Machovina MM;Doolin QV;Michener WE;Johnson CW;Knott BC;Beckham GT;McGeehan JE;DuBois JL
Biological funneling of lignin-derived aromatic compounds is a promising approach for valorizing its catalytic depolymerization products. Industrial processes for aromatic bioconversion will require efficient enzymes for key reactions, including demethylation of O-methoxy-aryl groups, an essential and often rate-limiting step. The recently characterized GcoAB cytochrome P450 system comprises a coupled monoxygenase (GcoA) and reductase (GcoB) that catalyzes oxidative demethylation of the O-methoxy-aryl group in guaiacol. Here, we evaluate a series of engineered GcoA variants for their ability to demethylate o-and p-vanillin, which are abundant lignin depolymerization products. Two rationally designed, single amino acid substitutions, F169S and T296S, are required to convert GcoA into an efficient catalyst toward the o- and p-isomers of vanillin, respectively. Gain-of-function in each case is explained in light of an extensive series of enzyme-ligand structures, kinetic data, and molecular dynamics simulations. Using strains of Pseudomonas putida KT2440 already optimized for p-vanillin production from ferulate, we demonstrate demethylation by the T296S variant in vivo. This work expands the known aromatic O-demethylation capacity of cytochrome P450 enzymes toward important lignin-derived aromatic monomers.
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影响因子:
5.2
作者:
Johnson CW;Abraham PE;Linger JG;Khanna P;Hettich RL;Beckham GT
通讯作者:
Beckham GT
影响因子:
2.9
作者:
CHRASTIL, J;WILSON, JT
通讯作者:
WILSON, JT
影响因子:
5
作者:
Graf, Nadja;Altenbuchner, Josef
通讯作者:
Altenbuchner, Josef
DOI:
10.1073/pnas.1410657111
发表时间:
2014-08-19
影响因子:
11.1
作者:
Linger, Jeffrey G.;Vardon, Derek R.;Beckham, Gregg T.
通讯作者:
Beckham, Gregg T.
DOI:
10.1111/j.1432-1033.1993.tb17750.x
发表时间:
1993-04-01
期刊:
EUROPEAN JOURNAL OF BIOCHEMISTRY
影响因子:
--
作者:
ELTIS, LD;KARLSON, U;TIMMIS, KN
通讯作者:
TIMMIS, KN