3s1i

Crystal structure of oxygen-bound hell's gate globin I

spinqualitylabelsall models 3s1i, resolution 1.77Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3s1i is a 3 chain structure with sequence from Methylacidiphilum infernorum V4. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.77Å Ligands: HEM, OXY, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function B3DUZ7_METI4 Publication Abstract from PubMed Hell's Gate globin I (HGbI), a heme-containing protein structurally homologous to mammalian neuroglobins, has been identified from an acidophilic and thermophilic obligate methanotroph, Methylacidiphilum infernorum. HGbI has very high affinity for O(2) and shows barely detectable autoxidation in the pH range of 5.2-8.6 and temperature range of 25-50 degrees C. Examination of the heme pocket by X-ray crystallography and molecular dynamics showed that conformational movements of Tyr29(B10) and Gln50(E7), as well as structural flexibility of the GH loop and H-helix, may play a role in modulating its ligand binding behavior. Bacterial HGbI's unique resistance to the sort of extreme acidity that would extract heme from any other hemoglobin makes it an ideal candidate for comparative structure-function studies of the expanding globin superfamily. Hell's Gate globin I: an acid and thermostable bacterial hemoglobin resembling mammalian neuroglobin.,Teh AH, Saito JA, Baharuddin A, Tuckerman JR, Newhouse JS, Kanbe M, Newhouse EI, Rahim RA, Favier F, Didierjean C, Sousa EH, Stott MB, Dunfield PF, Gonzalez G, Gilles-Gonzalez MA, Najimudin N, Alam M FEBS Lett. 2011 Oct 20;585(20):3250-8. Epub 2011 Sep 9. PMID:21925500 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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