2o9u | pdb_00002o9u

Monellin (MNEI) at 1.15 resolution

spinqualitylabelsall models 2o9u, resolution 1.15Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2o9u is a 1 chain structure with sequence from Dioscoreophyllum cumminsii. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: SO4 Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed The X-ray crystal structure of a single-chain monellin protein (MNEI) has been determined at 1.15 A resolution. The model was refined to convergence employing anisotropic displacement parameters and riding H atoms to produce a final model with R(work) and R(free) values of 0.132 and 0.162, respectively. The crystal contains a single MNEI protein in the asymmetric unit and unusually lacks the dimer interface observed in all previous crystal structures of monellin and its single-chain derivatives. The high resolution allowed a more detailed view of MNEI than previously possible, with 38 of the 96 residues modelled with alternative side-chain conformations, including four core residues Thr12, Cys41, Leu62 and Ile75. Four stably bound negative ions were also located, providing new insight into potential electrostatic interactions of MNEI with the largely negatively charged surface of the sweet taste receptor T1R2-T1R3. Monellin (MNEI) at 1.15 A resolution.,Hobbs JR, Munger SD, Conn GL Acta Crystallogr Sect F Struct Biol Cryst Commun. 2007 Mar 1;63(Pt, 3):162-7. Epub 2007 Feb 13. PMID:17329805 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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