5krq

Renalase in complex with NADPH

spinqualitylabelsall models 5krq, resolution 2.09Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5krq is a 2 chain structure with sequence from Pseudomonas savastanoi pv. phaseolicola. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.086Å Ligands: FAD, NDP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function RNLS_PSE14 Catalyzes the oxidation of the 1,2-dihydro- and 1,6-dihydro- isomeric forms of beta-NAD(P) back to beta-NAD(P)+. Has a preference for 1,2-dihydro-beta-NAD as substrate. May serve to protect primary metabolism dehydrogenases from inhibition by the 1,2-dihydro- and 1,6-dihydro-beta-NAD(P) isomers. Publication Abstract from PubMed Renalase catalyzes the oxidation of isomers of beta-NAD(P)H that carry the hydride in the 2 or 6 positions of the nicotinamide base to form beta-NAD(P)+. This activity is thought to alleviate inhibition of multiple beta-NAD(P)-dependent enzymes of primary and secondary metabolism by these isomers. Here we present evidence for a variety of ligand binding phenomena relevant to the function of renalase. We offer evidence of the potential for primary metabolism inhibition with structures of malate dehydrogenase and lactate dehydrogenase bound to the 6-dihydroNAD isomer. The previously observed preference of renalase from Pseudomonas for NAD-derived substrates over those derived from NADP is accounted for by the structure of the enzyme in complex with NADPH. We also show that nicotinamide nucleosides and mononucleotides reduced in the 2- and 6-positions are renalase substrates, but bind weakly. A seven-fold enhancement of acquisition (kred/Kd) for 6-dihydronicotinamide riboside was observed for human renalase in the presence of ADP. However, generally the addition of complement ligands, AMP for mononucleotide or ADP for nucleoside substrates, did not enhance the reductive half-reaction. Non-substrate nicotinamide nucleosides or nucleotides bind weakly suggesting that only beta-NADH and beta-NADPH compete with dinucleotide substrates for access to the active site. Ligand binding phenomena that pertain to the metabolic function of renalase.,Beaupre BA, Roman JV, Hoag MR, Meneely KM, Silvaggi NR, Lamb AL, Moran GR Arch Biochem Biophys. 2016 Oct 18;612:46-56. doi: 10.1016/j.abb.2016.10.011. PMID:27769837 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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