V2EX sedoheptulose-7-phosphate

Sedoheptulose-7-phosphate

释义 Definition

Sedoheptulose-7-phosphate(S7P)七碳糖磷酸的一种,指七碳糖“sedoheptulose”在第7位碳上带有磷酸基团的化合物。它是细胞代谢中的重要中间体,常见于磷酸戊糖途径(Pentose Phosphate Pathway)的非氧化阶段,也与某些生物的卡尔文循环(Calvin cycle)等碳代谢过程有关。(在不同语境下也可能涉及相关同分异构体或衍生物,但最常用即指该代谢中间体。)

发音 Pronunciation (IPA)

/sidohptjlos svn fsfet/

例句 Examples

Sedoheptulose-7-phosphate is an intermediate in the pentose phosphate pathway.
Sedoheptulose-7-磷酸是磷酸戊糖途径中的一种中间产物。

During carbon rearrangement reactions, sedoheptulose-7-phosphate can be formed and consumed by enzymes such as transaldolase and transketolase, helping balance cellular needs for NADPH and ribose sugars.
在碳骨架重排反应中,转醛酶和转酮酶等可生并消耗sedoheptulose-7-磷酸,从而帮助细胞在NADPH与核糖类前体的需求之间取得平衡。

词源 Etymology

该词由三部分构成:sedo-(历史上用于命名某类糖的前缀)+ heptulose(“七碳酮糖”,hept- 表示“七”,-ulose 常用于糖类命名)+ phosphate(“磷酸盐/磷酸基团”)。中间的 7 表示磷酸基团连接在第7号碳原子上,这是生物化学命名中常见的定位方式。

相关词 Related Words

文献与作品 Literary / Notable Works

  • Lehninger Principles of Biochemistry(《雷宁格生物化学原理》):在磷酸戊糖途径与糖磷酸重排反应中提及S7P。
  • Biochemistry by Berg, Tymoczko & Stryer(《生物化学(Stryer)》):讲解非氧化阶段的转酮酶/转醛酶反应时常出现该术语。
  • Voet & Voet: Biochemistry(《沃伊特生物化学》):在糖代谢网络与酶促碳重排内容中涉及Sedoheptulose-7-phosphate。
  • 经典代谢研究与综述中关于磷酸戊糖途径非氧化阶段的章节/论文也常使用该名词作为关键中间体。
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