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1utb
From Proteopedia
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| - | [[Image:1utb.gif|left|200px]]<br /> | + | [[Image:1utb.gif|left|200px]]<br /><applet load="1utb" size="450" color="white" frame="true" align="right" spinBox="true" |
| - | <applet load="1utb" size="450" color="white" frame="true" align="right" spinBox="true" | + | |
caption="1utb, resolution 2.59Å" /> | caption="1utb, resolution 2.59Å" /> | ||
'''DNTR FROM BURKHOLDERIA SP. STRAIN DNT'''<br /> | '''DNTR FROM BURKHOLDERIA SP. STRAIN DNT'''<br /> | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1UTB is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Burkholderia_sp. Burkholderia sp.] with ACT and GOL as [http://en.wikipedia.org/wiki/ligands ligands]. | + | 1UTB is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Burkholderia_sp. Burkholderia sp.] with ACT and GOL as [http://en.wikipedia.org/wiki/ligands ligands]. Known structural/functional Site: <scene name='pdbsite=AC1:Act Binding Site For Chain B'>AC1</scene>. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1UTB OCA]. |
==Reference== | ==Reference== | ||
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[[Category: transcriptional regulator]] | [[Category: transcriptional regulator]] | ||
| - | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Dec 18 18:10:33 2007'' |
Revision as of 16:00, 18 December 2007
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DNTR FROM BURKHOLDERIA SP. STRAIN DNT
Overview
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.
About this Structure
1UTB is a Protein complex structure of sequences from Burkholderia sp. with ACT and GOL as ligands. Known structural/functional Site: . 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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