2gjn: Difference between revisions

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==Overview==

Nitroalkane compounds are widely used in chemical industry and are also, produced by microorganisms and plants. Some nitroalkanes have been, demonstrated to be carcinogenic, and enzymatic oxidation of nitroalkanes, is of considerable interest. 2-Nitropropane dioxygenases from Neurospora, crassa and Williopsis mrakii (Hansenula mrakii), members of one family of, the nitroalkane-oxidizing enzymes, contain FMN and FAD, respectively. The, enzymatic oxidation of nitroalkanes by 2-nitropropane dioxygenase operates, by an oxidase-style catalytic mechanism, which was recently shown to, involve the formation of an anionic flavin semiquinone. This represents a, unique case in which an anionic flavin semiquinone has been experimentally, observed in the catalytic pathway for oxidation catalyzed by a, flavin-dependent enzyme. Here we report the first crystal structure of, 2-nitropropane dioxygenase from Pseudomonas aeruginosa in two forms: a, binary complex with FMN and a ternary complex with both FMN and, 2-nitropropane. The structure identifies His(152) as the proposed, catalytic base, thus providing a structural framework for a better, understanding of the catalytic mechanism.

Nitroalkane compounds are widely used in chemical industry and are also produced by microorganisms and plants. Some nitroalkanes have been demonstrated to be carcinogenic, and enzymatic oxidation of nitroalkanes is of considerable interest. 2-Nitropropane dioxygenases from Neurospora crassa and Williopsis mrakii (Hansenula mrakii), members of one family of the nitroalkane-oxidizing enzymes, contain FMN and FAD, respectively. The enzymatic oxidation of nitroalkanes by 2-nitropropane dioxygenase operates by an oxidase-style catalytic mechanism, which was recently shown to involve the formation of an anionic flavin semiquinone. This represents a unique case in which an anionic flavin semiquinone has been experimentally observed in the catalytic pathway for oxidation catalyzed by a flavin-dependent enzyme. Here we report the first crystal structure of 2-nitropropane dioxygenase from Pseudomonas aeruginosa in two forms: a binary complex with FMN and a ternary complex with both FMN and 2-nitropropane. The structure identifies His(152) as the proposed catalytic base, thus providing a structural framework for a better understanding of the catalytic mechanism.

==About this Structure==

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[[Category: Pseudomonas aeruginosa]]

[[Category: Single protein]]

[[Category: Suh, S.W.]]

[[Category: Suh, S W.]]

[[Category: FMN]]

[[Category: NIS]]

[[Category: 2-nitropropane]]

~~[[Category: 2-nitropropane dioxygenase]]~~

[[Category: fmn]]

[[Category: substrate]]

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@@ Line 4: / Line 4: @@
 ==Overview==
-Nitroalkane compounds are widely used in chemical industry and are also, produced by microorganisms and plants. Some nitroalkanes have been, demonstrated to be carcinogenic, and enzymatic oxidation of nitroalkanes, is of considerable interest. 2-Nitropropane dioxygenases from Neurospora, crassa and Williopsis mrakii (Hansenula mrakii), members of one family of, the nitroalkane-oxidizing enzymes, contain FMN and FAD, respectively. The, enzymatic oxidation of nitroalkanes by 2-nitropropane dioxygenase operates, by an oxidase-style catalytic mechanism, which was recently shown to, involve the formation of an anionic flavin semiquinone. This represents a, unique case in which an anionic flavin semiquinone has been experimentally, observed in the catalytic pathway for oxidation catalyzed by a, flavin-dependent enzyme. Here we report the first crystal structure of, 2-nitropropane dioxygenase from Pseudomonas aeruginosa in two forms: a, binary complex with FMN and a ternary complex with both FMN and, 2-nitropropane. The structure identifies His(152) as the proposed, catalytic base, thus providing a structural framework for a better, understanding of the catalytic mechanism.
+Nitroalkane compounds are widely used in chemical industry and are also produced by microorganisms and plants. Some nitroalkanes have been demonstrated to be carcinogenic, and enzymatic oxidation of nitroalkanes is of considerable interest. 2-Nitropropane dioxygenases from Neurospora crassa and Williopsis mrakii (Hansenula mrakii), members of one family of the nitroalkane-oxidizing enzymes, contain FMN and FAD, respectively. The enzymatic oxidation of nitroalkanes by 2-nitropropane dioxygenase operates by an oxidase-style catalytic mechanism, which was recently shown to involve the formation of an anionic flavin semiquinone. This represents a unique case in which an anionic flavin semiquinone has been experimentally observed in the catalytic pathway for oxidation catalyzed by a flavin-dependent enzyme. Here we report the first crystal structure of 2-nitropropane dioxygenase from Pseudomonas aeruginosa in two forms: a binary complex with FMN and a ternary complex with both FMN and 2-nitropropane. The structure identifies His(152) as the proposed catalytic base, thus providing a structural framework for a better understanding of the catalytic mechanism.
 ==About this Structure==
@@ Line 14: / Line 14: @@
 [[Category: Pseudomonas aeruginosa]]
 [[Category: Single protein]]
-[[Category: Suh, S.W.]]
+[[Category: Suh, S W.]]
 [[Category: FMN]]
 [[Category: NIS]]
 [[Category: 2-nitropropane]]
-[[Category: 2-nitropropane dioxygenase]]
 [[Category: fmn]]
 [[Category: substrate]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jan 29 20:01:24 2008''
+''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 17:32:22 2008''