3oi7

Structure of the structure of the H13A mutant of Ykr043C in complex with sedoheptulose-1,7-bisphosphate

spinqualitylabelsall models 3oi7, resolution 2.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3oi7 is a 4 chain structure with sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.4Å Ligands: EDO, GOL, MG, MSE, NA, OI7 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function SHB17_YEAST Sedoheptulose 1,7-bisphosphatase involved in riboneogenesis. Dephosphorylates sedoheptulose 1,7-bisphosphate (SBP), which is converted via the non-oxidative pentose phosphate pathway to ribose-5-phosphate. Has a fructose 1,6-bisphosphatase activity in vitro, but this is probably not biologically relevant, since deletion does not affect fructose 1,6-biphosphate (FBP) levels. Publication Abstract from PubMed Glucose is catabolized in yeast via two fundamental routes, glycolysis and the oxidative pentose phosphate pathway, which produces NADPH and the essential nucleotide component ribose-5-phosphate. Here, we describe riboneogenesis, a thermodynamically driven pathway that converts glycolytic intermediates into ribose-5-phosphate without production of NADPH. Riboneogenesis begins with synthesis, by the combined action of transketolase and aldolase, of the seven-carbon bisphosphorylated sugar sedoheptulose-1,7-bisphosphate. In the pathway's committed step, sedoheptulose bisphosphate is hydrolyzed to sedoheptulose-7-phosphate by the enzyme sedoheptulose-1,7-bisphosphatase (SHB17), whose activity we identified based on metabolomic analysis of the corresponding knockout strain. The crystal structure of Shb17 in complex with sedoheptulose-1,7-bisphosphate reveals that the substrate binds in the closed furan form in the active site. Sedoheptulose-7-phosphate is ultimately converted by known enzymes of the nonoxidative pentose phosphate pathway to ribose-5-phosphate. Flux through SHB17 increases when ribose demand is high relative to demand for NADPH, including during ribosome biogenesis in metabolically synchronized yeast cells. Riboneogenesis in yeast.,Clasquin MF, Melamud E, Singer A, Gooding JR, Xu X, Dong A, Cui H, Campagna SR, Savchenko A, Yakunin AF, Rabinowitz JD, Caudy AA Cell. 2011 Jun 10;145(6):969-80. PMID:21663798 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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