1zes

BeF3- activated PhoB receiver domain

spinqualitylabelsall models 1zes, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1zes is a 3 chain structure with sequence from Escherichia coli. The October 2015 RCSB PDB Molecule of the Month feature on Two-component Systems by David Goodsell is 10.2210/rcsb_pdb/mom_2015_10. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.9Å Ligands: BEF, MG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PHOB_ECOLI This protein is a positive regulator for the phosphate regulon. Transcription of this operon is positively regulated by PhoB and PhoR when phosphate is limited. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Response regulators (RRs), which undergo phosphorylation/dephosphorylation at aspartate residues, are highly prevalent in bacterial signal transduction. RRs typically contain an N-terminal receiver domain that regulates the activities of a C-terminal DNA binding domain in a phosphorylation-dependent manner. We present crystallography and solution NMR data for the receiver domain of Escherichia coli PhoB which show distinct 2-fold symmetric dimers in the inactive and active states. These structures, together with the previously determined structure of the C-terminal domain of PhoB bound to DNA, define the conformation of the active transcription factor and provide a model for the mechanism of activation in the OmpR/PhoB subfamily, the largest group of RRs. In the active state, the receiver domains dimerize with 2-fold rotational symmetry using their alpha4-beta5-alpha5 faces, while the effector domains bind to DNA direct repeats with tandem symmetry, implying a loss of intramolecular interactions. Mechanism of activation for transcription factor PhoB suggested by different modes of dimerization in the inactive and active states.,Bachhawat P, Swapna GV, Montelione GT, Stock AM Structure. 2005 Sep;13(9):1353-63. PMID:16154092 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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