3vmj

3-isopropylmalate dehydrogenase from Shewanella oneidensis MR-1

spinqualitylabelsall models 3vmj, resolution 1.56Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3vmj is a 1 chain structure with sequence from Sheon. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CL, IPM, MG Related: 3vmk, 3vml Gene: leuB, SO_4235 (SHEON) Activity: 3-isopropylmalate dehydrogenase, with EC number 1.1.1.85 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [LEU3_SHEON] Catalyzes the oxidation of 3-carboxy-2-hydroxy-4-methylpentanoate (3-isopropylmalate) to 3-carboxy-4-methyl-2-oxopentanoate. The product decarboxylates to 4-methyl-2 oxopentanoate. Publication Abstract from PubMed Organisms living in deep seas such as the Mariana Trench must be adapted to the extremely high pressure environment. For example, the 3-isopropylmalate dehydrogenase from the obligate piezophile Shewanella benthica DB21MT-2 (SbIPMDH) remains active in extreme conditions under which that from the land bacterium S. oneidensis MR-1 (SoIPMDH) becomes inactivated. In order to unravel the differences between these two IPMDHs, their structures were determined at ~1.5 A resolution. Comparison of the structures of the two enzymes shows that SbIPMDH is in a more open form and has a larger internal cavity volume than SoIPMDH at atmospheric pressure. This loosely packed structure of SbIPMDH could help it to avoid pressure-induced distortion of the native structure and to remain active at higher pressures than SoIPMDH. Structural analysis of 3-isopropylmalate dehydrogenase from the obligate piezophile Shewanella benthica DB21MT-2 and the nonpiezophile Shewanella oneidensis MR-1.,Nagae T, Kato C, Watanabe N Acta Crystallogr Sect F Struct Biol Cryst Commun. 2012 Mar 1;68(Pt 3):265-8. Epub, 2012 Feb 15. PMID:22442218 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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