Crystal structure of dicamba monooxygenase: a Rieske nonheme oxygenase that catalyzes oxidative demethylation.
Crystal structure of dicamba monooxygenase: a Rieske nonheme oxygenase that catalyzes oxidative demethylation.
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DOI:
10.1016/j.jmb.2009.07.021
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发表时间:
2009-09-18
影响因子:
5.6
通讯作者:
Wilson, Mark A.
中科院分区:
文献类型:
--
作者:
Dumitru, Razvan;Jiang, Wen Zhi;Weeks, Donald P.;Wilson, Mark A.
Dicamba (3,6-dichloro-2-methoxybenzoic acid) is a widely used herbicide that is efficiently degraded by soil microbes. These microbes use a novel Rieske non-heme oxygenase, dicamba monooxygenase (DMO), to catalyze the oxidative demethylation of dicamba to 3,6-dichlorosalicylic acid (DCSA) and formaldehyde. We have determined the crystal structures of DMO in the free state, bound to its substrate dicamba, and bound to the product DCSA at 2.10−1.75 Å resolution. The structures show that the DMO active site uses a combination of extensive hydrogen bonding and steric interactions to correctly orient chlorinated, ortho-substituted benzoic acid-like substrates for catalysis. Unlike other Rieske aromatic oxygenases, DMO oxygenates the exocyclic methyl group, rather than the aromatic ring, of its substrate. This first crystal structure of a Rieske demethylase shows that the Rieske oxygenase structural scaffold can be co-opted to perform varied types of reactions on xenobiotic substrates.
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DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
5.7
作者:
Kauppi, B;Lee, K;Ramaswamy, S
通讯作者:
Ramaswamy, S
影响因子:
3.2
作者:
LOCHER, HH;LEISINGER, T;COOK, AM
通讯作者:
COOK, AM
影响因子:
56.9
作者:
Behrens, Mark R.;Mutlu, Nedim;Weeks, Donald P.
通讯作者:
Weeks, Donald P.
DOI:
10.1111/j.1432-1033.1977.tb11230.x
发表时间:
1977-01-01
期刊:
EUROPEAN JOURNAL OF BIOCHEMISTRY
影响因子:
--
作者:
BERNHARDT, FH;NASTAINCZYK, W;SEYDEWITZ, V
通讯作者:
SEYDEWITZ, V