翻訳と辞書 Words near each other ・ Fruit press ・ Fruit production in Iran ・ Fruit pudding ・ Fruit Ridge (Michigan) ・ Frucht's theorem ・ Fruchtschiefer ・ Frucor ・ Frucourt ・ FRUCT ・ Fructan ・ Fructan beta-(2,1)-fructosidase ・ Fructan beta-(2,6)-fructosidase ・ Fructan beta-fructosidase ・ Fructidor ・ Fructification ・ Fructokinase ・ Fructolysis ・ Fructone ・ Fructooligosaccharide ・ Fructosamine ・ Fructosamine kinase family ・ Fructosamine-3-kinase ・ Fructose ・ Fructose 1,6-bisphosphatase ・ Fructose 1,6-bisphosphate ・ Fructose 1-phosphate ・ Fructose 2,6-bisphosphate ・ Fructose 5-dehydrogenase ・ Fructose 5-dehydrogenase (NADP+) ・ Fructose 6-phosphate Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Fructokinase ： ウィキペディア英語版 Fructokinase Fructokinase (/fruc•to•ki•nase/ ()) (), also known as D-fructokinase or D-fructose (D-mannose) kinase,〔(DBGET ENZYME: 2.7.1.4 ). Retrieved 2007-05-06〕 is an enzyme of the liver, intestine, and kidney cortex. Fructokinase is in a family of enzymes called transferases, meaning that this enzyme transfers functional groups; it is also considered a phosphotransferase (or, frequently, a kinase) since it specifically transfers a phosphate group.〔 Fructokinase specifically catalyzes the transfer of a phosphate group from ATP (the substrate) to fructose as the initial step in its utilization.〔 The main role of fructokinase is in carbohydrate metabolism, more specifically, sucrose and fructose metabolism. The reaction equation is as follows: ATP + D-fructose = ADP + D-fructose 1-phosphate. This is notable because in most tissues this reaction is catalyzed by hexokinase, forming instead fructose 6-phosphate. ==Role in Plants and Bacteria== Fructokinase has been characterized from various organisms such as pea (''Pisum sativum'') seeds, avocado (''Persera americana'') fruit, and maize (''Zea mays'') kernels, and many more. Specifically, fructokinase may also regulate starch synthesis in conjunction with SS, sucrose synthase, which first metabolizes sink tissue in plant tissues such as in potatoes.〔 There are also two divergent fructokinase genes that are differentially expressed and which also have different enzymatic properties such as those found in tomatoes. In tomatoes, fructokinase 1 (Frk 1) mRNA is expressed at a constant level during fruit development. However, fructokinase 2 (Frk 2) mRNA has a high expression level in young tomato fruit but then decreases during the later stages of fruit development. Frk 2 has a higher affinity for fructose than Frk 1 but Frk 2 activity is inhibited by high levels of fructose, whereas Frk 1 activity is not.〔 In ''Sinorhizobium meliloti'', a common gram-soil bacterium, fructokinase is also used in the metabolism of mannitol and sorbitol, in addition to the metabolism of fructose. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Fructokinase」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.