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首页> 外文期刊>Trends in Plant Science >Plant cutin biosynthesis: the involvement of a new acyltransferase
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Plant cutin biosynthesis: the involvement of a new acyltransferase

机译：植物角质生物合成：一种新的酰基转移酶的参与

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Two important paradigms in plant lipid metabolism relating to plant cuticle genesis are yet to be established. A major component of the cuticle is a lipid polyester called cutin, which in turn is covered by surface waxes. The composition of the cuticular waxes and the insoluble cutin, as well as their physiological characteristics, have been reported previously, but how these compounds are transported out of the cells and through the cell wall is not known and the enzymes involved in cutin biosynthesis have not been characterized. The role of cuticle synthesis in epidermal cell interactions has been described as a new frontier in plant developmental biology. Twenty-seven years ago Rodney Croteau and Pappachan Kolattukudy reported that only leaf epidermis and fruit skin were capable of converting exogeneous hydroxy fatty acid precursors into an interesterified three-dimensional polymer. They postulated the existence of an acyltransferase that transfers the hydroxyacyl moieties from their CoA esters to the growing cutin polymer. To date, no mutants deficient in cutin have been identified for any plant, and no genes involved in cutin biosynthesis are known. Following the hypothesis of this research, we have recently investigated a protein involved in cutin synthesis in epidermis excised from leaves of Agave americana. The cuticle of this plant has been extensively studied in our laboratory.
机译：与植物表皮发生有关的植物脂质代谢中的两个重要范例尚未建立。角质层的主要成分是称为角质的脂质聚酯，而角质又被表面蜡覆盖。角质层蜡和不溶性角质素的组成及其生理特性，以前已有报道，但这些化合物如何从细胞中转运出并穿过细胞壁尚不清楚，角质素生物合成所涉及的酶尚不清楚。被表征。表皮合成在表皮细胞相互作用中的作用已被描述为植物发育生物学的新领域。二十七年前，Rodney Croteau和Pappachan Kolattukudy报告说，只有叶表皮和果皮才能够将外源羟基脂肪酸前体转化为酯化的三维聚合物。他们推测存在酰基转移酶，该酰基转移酶可将羟酰基部分从其CoA酯转移到生长的角质聚合物中。迄今为止，尚未针对任何植物鉴定出缺乏角质的突变体，并且还不知道参与角质生物合成的基因。根据这项研究的假设，我们最近研究了一种从美洲龙舌兰叶片上切下来的表皮中与角质合成有关的蛋白质。在我们的实验室里已经对该植物的表皮进行了广泛的研究。

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