1lwn

Crystal structure of rabbit muscle glycogen phosphorylase a in complex with a potential hypoglycaemic drug at 2.0 A resolutionCrystal structure of rabbit muscle glycogen phosphorylase a in complex with a potential hypoglycaemic drug at 2.0 A resolution

Structural highlights 1lwn is a 1 chain structure with sequence from Oryctolagus cuniculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: , NonStd Res: Related: 1h5u, 1lwo Activity: Phosphorylase, with EC number 2.4.1.1 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [PYGM_RABIT] Phosphorylase is an important allosteric enzyme in carbohydrate metabolism. Enzymes from different sources differ in their regulatory mechanisms and in their natural substrates. However, all known phosphorylases share catalytic and structural properties. 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 CP320626 has been identified as a potent inhibitor, synergistic with glucose, of human liver glycogen phosphorylase a (LGPa), a possible target for type 2 diabetes therapy. CP320626 is also a potent inhibitor of human muscle GPa. In order to elucidate the structural basis of the mechanism of CP320626 inhibition, the structures of T state rabbit muscle GPa (MGPa) in complex with glucose and in complex with both glucose and CP320626 were determined at 2.0 A resolution, and refined to crystallographic R values of 0.179 (R(free)=0.218) and 0.207 (R(free)=0.235), respectively. CP320626 binds at the new allosteric site, some 33 A from the catalytic site, where glucose binds. The binding of CP320626 to MGPa does not promote extensive conformational changes except for small shifts of the side chain atoms of residues R60, V64, and K191. Both CP320626 and glucose promote the less active T state, while structural comparisons of MGPa-glucose-CP320626 complex with LGPa complexed with a related compound (CP403700) and a glucose analogue inhibitor indicate that the residues of the new allosteric site, conserved in the two isozymes, show no significant differences in their positions. Crystal structure of rabbit muscle glycogen phosphorylase a in complex with a potential hypoglycaemic drug at 2.0 A resolution.,Oikonomakos NG, Chrysina ED, Kosmopoulou MN, Leonidas DD Biochim Biophys Acta. 2003 Apr 11;1647(1-2):325-32. PMID:12686153 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Glycogen phosphorylase 3D structures

spinqualitylabelsall models 1lwn, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image