3d7b | pdb_00003d7b

The Ribonuclease A- 5'-Deoxy-5'-N-pyrrolidinouridine complex

spinqualitylabelsall models 3d7b, resolution 1.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3d7b is a 2 chain structure with sequence from Bos taurus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: FLC, U4S Related: 3d6o, 3d6p, 3d6q Activity: Pancreatic ribonuclease, with EC number 3.1.27.5 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [RNAS1_BOVIN] Endonuclease that catalyzes the cleavage of RNA on the 3' side of pyrimidine nucleotides. Acts on single stranded and double stranded RNA. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Six 5'-deoxy-5'-morpholine, piperidine, and pyrrolidine of pyrimidine nucleosides have been synthesized and characterized. Their inhibitory action to ribonuclease A has been studied by biochemical analysis and X-ray crystallography. These compounds are moderate inhibitors of RNase A with mid-to-upper micromolar inhibition constants (K(i)). The high resolution X-ray crystal structures of the RNase A-inhibitor complexes have shown that all inhibitors bind at the enzyme catalytic cleft with the pyrimidine nucleobase at the B(1)R(2) subsites while the 5' group binds away from the main subsite P(1), where P-O(5') bond cleavage occurs, toward the solvent close to subsite P(0). Structure-activity relationship analysis has demonstrated that the compounds with the larger group in the 5' position are more potent. Comparative structural analysis of these RNase A complexes with other similar RNase A-ligand complexes provides a structural explanation of their potency and suggests ways to improve their efficiency and selectivity. These inhibitors can be the starting point for the development of compounds that can be used as pharmaceuticals against pathologies associated with RNase A homologues such as human angiogenin, which is implicated in tumor induced neovascularization. Morpholino, Piperidino, and Pyrrolidino Derivatives of Pyrimidine Nucleosides as Inhibitors of Ribonuclease A: Synthesis, Biochemical, and Crystallographic Evaluation (#) (,) (dagger).,Samanta A, Leonidas DD, Dasgupta S, Pathak T, Zographos SE, Oikonomakos NG J Med Chem. 2009 Jan 27. PMID:19173562 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ribonuclease 3D structures Temp

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