Title

植物淀粉合成的调控酶

Translated Titles

Key Enzymes in Starch Synthesis in Plants

Authors

康国章(Guo-Zhang Kang);王永华(Yong-Hua Wang);郭天财(Tian-Cai Guo);朱云集(Yun-Ji Zhu);官春云(Chun-Yun Guan)

Key Words

淀粉 ; 突变体 ; 生物合成 ; 基因工程 ; starch ; mutants ; biosynthesis ; gene engineering

PublicationName

遺傳

Volume or Term/Year and Month of Publication

28卷1期(2006 / 01 / 01)

Page #

110 - 116

Content Language

簡體中文

Chinese Abstract

植物淀粉的生物合成主要涉及了4种酶-ADPG焦磷酸化酶、淀粉合成酶、淀粉分支酶和淀粉去分支酶,它们在淀粉的生物合成中发挥着不同作用。近年来,随着基因工程技术的迅速发展及与这些酶有关的众多突变体的发现,使人们对这些酶的结构、特性、功能及表达调控等方面的研究取得了重要进展。并且,人们已开始利用基因工程技术调控植物淀粉的数量与特性,取得了一定成效。在此,文章介绍了调控植物淀粉合成关键酶的生化特性、基因调控及利用基因工程改良植物淀粉等方面所取得进展。

English Abstract

It is composed of two types of α-1, 4-linked glucan polymer: essentially unbranched amylose and regularly branched amylopectin, and synthesized in photosynthetic and non-photosynthetic organs. Starch is synthesized via four committed enzyme steps: ADP-Glc pyrophosphorylase, which synthesizes sugar nucleotide precursors; starch synthase, which extends the α-1, 4-linked glucan chains using ACP-Glc; starch-branching enzymes, which introduce α-1, 6 branch points to form amylopectin; and starch debranching enzymes, which hydrolyze α-1, 6 branches in glucans. In this paper, recent advances in biochemical characterizations and gene engineering concerning these enzymes were reviewed, and the achievements in gene engineering involved in manipulation of starch amount and quality were also cited.

Topic Category 醫藥衛生 > 醫藥總論
醫藥衛生 > 基礎醫學
生物農學 > 生物科學