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D-fructose-1-phosphate

D-果糖-1-磷酸

公司名称: Sigma-Aldrich
产品编号: S408689
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Determination of Fructokinase Activity from Zobellia galactanivorans
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2015-11-05
[Abstract]  Mannitol is a polyol that occurs in a wide range of living organisms, where it fulfills different physiological roles. Several pathways have been described for the metabolism of mannitol by bacteria, including the phosphoenolpyruvate-dependent phosphotransferase system (PST) and a M2DH-based catabolic pathway. The latter involves two enzymes, a mannitol-2-dehydrogenase (EC 1.1.1.67) and a fructokinase (EC 2.7.1.4), and has been identified in different bacteria, e.g.,, the marine Bacteroidetes Zobellia galactanivorans (Zg) which had recently gained interest to study ... [摘要]  甘露醇是在多种活生物体中发生的多元醇,其中它实现不同的生理作用。已经描述了用于由细菌代谢甘露醇的几种途径,包括磷酸烯醇丙酮酸依赖性磷酸转移酶系统(PST)和基于M2DH的分解代谢途径。后者涉及两种酶,甘露醇-2-脱氢酶(EC 1.1.1.67)和果糖激酶(EC 2.7.1.4),并且已经在不同的细菌中鉴定,例如海洋拟杆菌Zobellia galactanivorans ( Zg ),其最近获得了研究大分子多糖降解的兴趣。该方案描述了Zobellia 半乳糖厌氧杆菌的重组果糖激酶(FK)的生物化学表征。 < strong> [原理] 果糖激酶(FK)活性通过以下方法确定:果糖激酶(FK)活性通过使用ATP作为辅因子来催化果糖转化成果糖-6-磷酸。酶偶联测定(图1)。通过FK反应(即果糖磷酸化成果糖-6-磷酸(F6P))形成的ADP由将磷酸烯醇丙酮酸(PEP)转化为丙酮酸的丙酮酸激酶(PK)使用。然后,乳酸脱氢酶(LDH)使用NADH作为辅因子将丙酮酸转化为乳酸。通过跟随在340nm处的吸光度的降低来测量FK活性,其对应于NADH转化为NAD +

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