5mso

Structure of the R domain of carboxylic acid reductase (CAR) from Mycobacterium marinum in complex with NADP

spinqualitylabelsall models 5mso, resolution 1.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5mso is a 1 chain structure with sequence from Mycobacterium marinum M. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.2Å Ligands: NAP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CAR_MYCMM Catalyzes the reduction of a wide range of aliphatic fatty acids (C6-C18) into their corresponding aldehydes, by using ATP for energy to drive the reaction. Can also reduce benzoate to benzaldehyde. Has a preference for NADPH over NADH as the electron donor. Publication Abstract from PubMed Carboxylic acid reductase (CAR) catalyzes the ATP- and NADPH-dependent reduction of carboxylic acids to the corresponding aldehydes. The enzyme is related to the nonribosomal peptide synthetases, consisting of an adenylation domain fused via a peptidyl carrier protein (PCP) to a reductase termination domain. Crystal structures of the CAR adenylation-PCP didomain demonstrate that large-scale domain motions occur between the adenylation and thiolation states. Crystal structures of the PCP-reductase didomain reveal that phosphopantetheine binding alters the orientation of a key Asp, resulting in a productive orientation of the bound nicotinamide. This ensures that further reduction of the aldehyde product does not occur. Combining crystallography with small-angle X-ray scattering (SAXS), we propose that molecular interactions between initiation and termination domains are limited to competing PCP docking sites. This theory is supported by the fact that (R)-pantetheine can support CAR activity for mixtures of the isolated domains. Our model suggests directions for further development of CAR as a biocatalyst. Structures of carboxylic acid reductase reveal domain dynamics underlying catalysis.,Gahloth D, Dunstan MS, Quaglia D, Klumbys E, Lockhart-Cairns MP, Hill AM, Derrington SR, Scrutton NS, Turner NJ, Leys D Nat Chem Biol. 2017 Sep;13(9):975-981. doi: 10.1038/nchembio.2434. Epub 2017 Jul , 17. PMID:28719588 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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