3zt9 | pdb_00003zt9

The bacterial stressosome: a modular system that has been adapted to control secondary messenger signaling

spinqualitylabelsall models 3zt9, resolution 1.75Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3zt9 is a 1 chain structure with sequence from Moorella thermoacetica. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.75Å Ligands: MN, PEG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q2RIF7_MOOTA Publication Abstract from PubMed The stressosome complex regulates downstream effectors in response to environmental signals. In Bacillus subtilis, it activates the alternative sigma factor sigma(B), leading to the upregulation of the general stress regulon. Herein, we characterize a stressosome-regulated biochemical pathway in Moorella thermoacetica. We show that the presumed sensor, MtR, and the scaffold, MtS, form a pseudo-icosahedral structure like that observed in B. subtilis. The N-terminal domain of MtR is structurally homologous to B. subtilis RsbR, despite low sequence identity. The affinity of the switch kinase, MtT, for MtS decreases following MtS phosphorylation and not because of structural reorganization. Dephosphorylation of MtS by the PP2C type phosphatase MtX permits the switch kinase to rebind the stressosome to reset the response. We also show that MtT regulates cyclic di-GMP biosynthesis through inhibition of a GG(D/E)EF-type diguanylate cyclase, demonstrating that secondary messenger levels are regulated by the stressosome. The Bacterial Stressosome: A Modular System that Has Been Adapted to Control Secondary Messenger Signaling.,Quin MB, Berrisford JM, Newman JA, Basle A, Lewis RJ, Marles-Wright J Structure. 2012 Feb 8;20(2):350-63. PMID:22325782 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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