What is New about Glycerol Metabolism in Plants
What is New about Glycerol Metabolism in Plants
复制标题
植物中甘油代谢的新变化
DOI：
10.1007/978-94-017-0159-4_9
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
M. Miquel
中科院分区：
文献类型：
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作者：
M. Miquel
甘油-3-磷酸（G3P）是所有甘油脂的重要组成部分。尽管具有这种重要性，但对其合成和在植物脂质合成的不同部位的供应知之甚少。G3P至少存在于细胞的质体和细胞质中。已经证明它可以通过两种代谢途径合成（Frentzen, 1993）。它可以在叶片的叶绿体和细胞质中通过NAD+-G3P氧化还原酶的作用由磷酸二羟丙酮（DHAP）形成（Santora et al., 1979; Gee et al., 1988a, b， c和1989；Kirsch et al., 1992），也可以在油菜的未成熟种子中形成（Sharma et al., 2001）。G3P也可以通过细胞质中甘油激酶介导的甘油磷酸化途径由DHAP产生（Gosh和Sastry， 1988）。除了在花生种子发育过程中（Gosh和Sastry， 1988），这两种途径都可以找到，因此提出了不同途径及其调控的各自作用和重要性的问题。
Glycerol-3-phosphate (G3P) is an essential component of all glycerolipids. Despite this importance, little is known about its synthesis and supply to the different sites of lipid synthesis in plants. G3P is present in (at least) the plastids and cytoplasm of cells. It has been demonstrated that it can be synthesized via two metabolic pathways (Frentzen, 1993). It can be formed from dihydroxyacetone phosphate (DHAP) by the action of a NAD+-G3P oxidoreductase in both the chloroplast and cytoplasm of leaves (Santora et al., 1979; Gee et al., 1988a, b, c and 1989; Kirsch et al., 1992), and in immature seeds ofBrassica campestris(Sharma et al., 2001). G3P can also be generated from DHAP by the glycerokinase-mediated, glycerol-phosphorylation pathway in the cytoplasm (Gosh and Sastry, 1988). Except in developing groundnut seeds (Gosh and Sastry, 1988), both pathways can be found, therefore raising the question of the respective role and importance of the different pathways and their regulation.