2bmq: Difference between revisions

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[[Image:2bmq.gif|left|200px]]
{{Seed}}
[[Image:2bmq.png|left|200px]]


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{{STRUCTURE_2bmq|  PDB=2bmq  |  SCENE=  }}  
{{STRUCTURE_2bmq|  PDB=2bmq  |  SCENE=  }}  


'''THE CRYSTAL STRUCTURE OF NITROBENZENE DIOXYGENASE IN COMPLEX WITH NITROBENZENE'''
===THE CRYSTAL STRUCTURE OF NITROBENZENE DIOXYGENASE IN COMPLEX WITH NITROBENZENE===




==Overview==
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Nitroaromatic compounds are used extensively in many industrial processes and have been released into the environment where they are considered environmental pollutants. Nitroaromatic compounds, in general, are resistant to oxidative attack due to the electron-withdrawing nature of the nitro groups and the stability of the benzene ring. However, the bacterium Comamonas sp. strain JS765 can grow with nitrobenzene as a sole source of carbon, nitrogen and energy. Biodegradation is initiated by the nitrobenzene dioxygenase (NBDO) system. We have determined the structure of NBDO, which has a hetero-hexameric structure similar to that of several other Rieske non-heme iron dioxygenases. The catalytic subunit contains a Rieske iron-sulfur center and an active-site mononuclear iron atom. The structures of complexes with substrates nitrobenzene and 3-nitrotoluene reveal the structural basis for its activity with nitroarenes. The substrate pocket contains an asparagine residue that forms a hydrogen bond to the nitro-group of the substrate, and orients the substrate in relation to the active-site mononuclear iron atom, positioning the molecule for oxidation at the nitro-substituted carbon.
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{{ABSTRACT_PUBMED_15854650}}


==About this Structure==
==About this Structure==
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[[Category: Rieske non-heme dioxygenase]]
[[Category: Rieske non-heme dioxygenase]]
[[Category: Substrate specificity iron-sulfur]]
[[Category: Substrate specificity iron-sulfur]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 20:30:20 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 00:10:24 2008''

Revision as of 21:10, 28 July 2008

File:2bmq.png

Template:STRUCTURE 2bmq

THE CRYSTAL STRUCTURE OF NITROBENZENE DIOXYGENASE IN COMPLEX WITH NITROBENZENE

Template:ABSTRACT PUBMED 15854650

About this Structure

2BMQ is a Protein complex structure of sequences from Comamonas sp.. Full crystallographic information is available from OCA.

Reference

Structural insight into the dioxygenation of nitroarene compounds: the crystal structure of nitrobenzene dioxygenase., Friemann R, Ivkovic-Jensen MM, Lessner DJ, Yu CL, Gibson DT, Parales RE, Eklund H, Ramaswamy S, J Mol Biol. 2005 May 20;348(5):1139-51. Epub 2005 Apr 7. PMID:15854650

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