1utb

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[[Image:1utb.gif|left|200px]]
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[[Image:1utb.png|left|200px]]
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{{STRUCTURE_1utb| PDB=1utb | SCENE= }}
{{STRUCTURE_1utb| PDB=1utb | SCENE= }}
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'''DNTR FROM BURKHOLDERIA SP. STRAIN DNT'''
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===DNTR FROM BURKHOLDERIA SP. STRAIN DNT===
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==Overview==
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The transcriptional regulator DntR, a member of the LysR family, is a central element in a prototype bacterial cell-based biosensor for the detection of hazardous contamination of soil and groundwater by dinitrotoluenes. To optimise the sensitivity of the biosensor for such compounds we have chosen a rational design of the inducer-binding cavity based on knowledge of the three-dimensional structure of DntR. We report two crystal structures of DntR with acetate (resolution 2.6 angstroms) and thiocyanate (resolution 2.3 angstroms), respectively, occupying the inducer-binding cavity. These structures allow for the construction of models of DntR in complex with salicylate (Kd approximately or = 4 microM) and 2,4-dinitrotoluene that provide a basis for the design of mutant DntR with enhanced specificity for dinitrotoluenes. In both crystal structures DntR crystallises as a homodimer with a "head-to-tail" arrangement of monomers in the asymmetric unit. Analysis of the crystal structure has allowed the building of a full-length model of DntR in its biologically active homotetrameric form consisting of two "head-to-head" dimers. The implications of this model for the mechanism of transcription regulation by LysR proteins are discussed.
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(as it appears on PubMed at http://www.pubmed.gov), where 15210343 is the PubMed ID number.
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{{ABSTRACT_PUBMED_15210343}}
==About this Structure==
==About this Structure==
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[[Category: Lysr]]
[[Category: Lysr]]
[[Category: Transcriptional regulator]]
[[Category: Transcriptional regulator]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 11:39:37 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 17:12:48 2008''

Revision as of 14:12, 28 July 2008

Image:1utb.png

Template:STRUCTURE 1utb

DNTR FROM BURKHOLDERIA SP. STRAIN DNT

Template:ABSTRACT PUBMED 15210343

About this Structure

1UTB is a Protein complex structure of sequences from Burkholderia sp.. Full crystallographic information is available from OCA.

Reference

Development of a bacterial biosensor for nitrotoluenes: the crystal structure of the transcriptional regulator DntR., Smirnova IA, Dian C, Leonard GA, McSweeney S, Birse D, Brzezinski P, J Mol Biol. 2004 Jul 9;340(3):405-18. PMID:15210343

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