5yjx

Structure of the Ndi1 protein from Saccharomyces cerevisiae in complex with myxothiazol.

spinqualitylabelsall models 5yjx, resolution 3.21Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5yjx is a 2 chain structure with sequence from Saccharomyces cerevisiae S288C. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 3.21Å Ligands: FAD, MES, MG, MYX Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function NDI1_YEAST Catalyzes the oxidation of NADH generated inside the Mitochondrion. Publication Abstract from PubMed Yeast Ndi1 is a monotopic alternative NADH dehydrogenase. Its crystal structure in complex with the electron acceptor, ubiquinone, has been determined. However, there has been controversy regarding the ubiquinone binding site. To address these points, we identified the first competitive inhibitor of Ndi1, stigmatellin, along with new mixed-type inhibitors, AC0-12 and myxothiazol, and thereby determined the crystal structures of Ndi1 in complexes with the inhibitors. Two separate binding sites of stigmatellin, STG-1 and STG-2, were observed. The electron density at STG-1, located at the vicinity of the FAD cofactor, further demonstrated two binding modes: STG-1a and STG-1b. AC0-12 and myxothiazol are also located at the vicinity of FAD. The comparison of the binding modes among stigmatellin at STG-1, AC0-12, and myxothiazol revealed a unique position for the aliphatic tail of stigmatellin at STG-1a. Mutations of amino acid residues that interact with this aliphatic tail at STG-1a reduced the affinity of Ndi1 for ubiquinone. In conclusion, the position of the aliphatic tail of stigmatellin at STG-1a provides a structural basis for its competitive inhibition of Ndi1. The inherent binding site of ubiquinone is suggested to overlap with STG-1a that is distinct from the binding site for NADH. Ubiquinone binding site of yeast NADH dehydrogenase revealed by structures binding novel competitive- and mixed-type inhibitors.,Yamashita T, Inaoka DK, Shiba T, Oohashi T, Iwata S, Yagi T, Kosaka H, Miyoshi H, Harada S, Kita K, Hirano K Sci Rep. 2018 Feb 5;8(1):2427. doi: 10.1038/s41598-018-20775-6. PMID:29402945 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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