6cpt

crystal structure of yeast caPDE2 in complex with IBMX

spinqualitylabelsall models 6cpt, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6cpt is a 1 chain structure with sequence from Candida albicans. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: IBM, MG, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q8NJP9_CANAX Publication Abstract from PubMed The cAMP signaling system plays important roles in the physiological processes of pathogen yeast Candida albicans, but its functional mechanism has not been well illustrated. Here, we report the enzymatic characterization and crystal structures of C. albicans phosphodiesterase 2 (caPDE2) in the unliganded and 3-isobutyl-1-methylxanthine-complexed forms. caPDE2 is a monomer in liquid and crystal states and specifically hydrolyzes cAMP with a KM of 35 nM. It does not effectively hydrolyze cGMP as shown by the 1.32 x 10(5)-fold specificity of cAMP/cGMP. The crystal structure of caPDE2 shows significant differences from those of human PDEs. First, the N-terminal fragment of caPDE2 (residues 1-201) tightly associates with the catalytic domain to form a rigid molecular entity, implying its stable molecular conformation for C. albicans to resist environmental stresses. Second, the M-loop, a critical fragment for binding of the substrate and inhibitors to human PDEs, is not a part of the caPDE2 active site. This feature of caPDE2 may provide a structural basis for the design of selective inhibitors for the treatment of yeast infection. Crystal Structures of Candida albicans Phosphodiesterase 2 and Implications for Its Biological Functions.,Yao T, Huang Y, Zhang M, Chen Y, Pei H, Shi J, Wang H, Wang Y, Ke H Biochemistry. 2018 Oct 23;57(42):6070-6077. doi: 10.1021/acs.biochem.8b00707., Epub 2018 Oct 4. PMID:30231198 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Phosphodiesterase 3D structures

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