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標題: The crystal structure of phosphoglucose isomerase/autocrine motility factor/neuroleukin complexed with its carbohydrate phosphate inhibitors suggests its substrate/receptor recognition
作者: Chou, C.C.
Sun, Y.J.
Meng, M.S.
Hsiao, C.D.
關鍵字: n-bromoacetylethanolamine phosphate
glucose-6-phosphate isomerase
phosphohexose isomerase
factor neuroleukin
protein structures
期刊/報告no:: Journal of Biological Chemistry, Volume 275, Issue 30, Page(s) 23154-23160.
摘要: Phosphoglucose isomerase catalyzes the reversible isomerization of glucose 6-phosphate to fructose B-phosphate. In addition, phosphoglucose isomerase has been shown to have functions equivalent to neuroleukin, autocrine motility factor, and maturation factor. Here we present the crystal structures of phosphoglucose isomerase complexed with 5-phospho-D-arabinonate and N-bromoacetylethanolamine phosphate at 2.5- and 2.3-Angstrom resolution, respectively. The inhibitors bind to a region within the domains' interface and interact with a histidine residue (His(306)) from the other subunit. We also demonstrated that the inhibitors not only affect the enzymatic activity of phosphoglucose isomerase, but can also inhibit the autocrine motility factor-induced cell motility of CT-26 mouse colon tumor cells. These results indicate that the substrate and the receptor binding sites of phosphoglucose isomerase and autocrine motility factor are located within close proximity to each other. Based on these two complex structures, together with biological and biochemical results, we propose a possible isomerization mechanism for phosphoglucose isomerase.
ISSN: 0021-9258
Appears in Collections:生物科技學研究所



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