2bj3
From Proteopedia
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==Overview== | ==Overview== | ||
| - | The Pyrococcus horikoshii OT3 genome contains a gene (PH0601 or nikR) | + | The Pyrococcus horikoshii OT3 genome contains a gene (PH0601 or nikR) encoding a protein (PhNikR) that shares 33.8% amino acid sequence identity with Escherichia coli nickel responsive repressor NikR (EcNikR), including many residues that are functionally important in the E.coli ortholog. We succeeded in crystallization and structural characterization of PhNikR in the apo form and two nickel bound forms that exhibit different conformations, open and closed. Moreover, we have identified a putative "low-affinity" nickel-binding pocket in the closed form. This binding site has unusual nickel coordination and exhibits high sensitivity to phosphate in the crystal structure. Analysis of the PhNikR structures and structure-based mutational studies with EcNikR reveals a plausible mechanism of nickel-dependent promoter recognition by the NikR family of proteins. |
==About this Structure== | ==About this Structure== | ||
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[[Category: Pyrococcus horikoshii]] | [[Category: Pyrococcus horikoshii]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
| - | [[Category: RSGI, RIKEN | + | [[Category: RSGI, RIKEN Structural Genomics/Proteomics Initiative.]] |
| - | [[Category: Tahirov, T | + | [[Category: Tahirov, T H.]] |
[[Category: CL]] | [[Category: CL]] | ||
[[Category: MG]] | [[Category: MG]] | ||
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[[Category: transcription]] | [[Category: transcription]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 16:38:22 2008'' |
Revision as of 14:38, 21 February 2008
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NIKR-APO
Overview
The Pyrococcus horikoshii OT3 genome contains a gene (PH0601 or nikR) encoding a protein (PhNikR) that shares 33.8% amino acid sequence identity with Escherichia coli nickel responsive repressor NikR (EcNikR), including many residues that are functionally important in the E.coli ortholog. We succeeded in crystallization and structural characterization of PhNikR in the apo form and two nickel bound forms that exhibit different conformations, open and closed. Moreover, we have identified a putative "low-affinity" nickel-binding pocket in the closed form. This binding site has unusual nickel coordination and exhibits high sensitivity to phosphate in the crystal structure. Analysis of the PhNikR structures and structure-based mutational studies with EcNikR reveals a plausible mechanism of nickel-dependent promoter recognition by the NikR family of proteins.
About this Structure
2BJ3 is a Single protein structure of sequence from Pyrococcus horikoshii with and as ligands. Known structural/functional Site: . Full crystallographic information is available from OCA.
Reference
Structure of Pyrococcus horikoshii NikR: nickel sensing and implications for the regulation of DNA recognition., Chivers PT, Tahirov TH, J Mol Biol. 2005 May 6;348(3):597-607. PMID:15826657
Page seeded by OCA on Thu Feb 21 16:38:22 2008
