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番茄(Solanum lycopersicum)分泌组的蛋白质组学分析。

Proteomic analysis of tomato (Solanum lycopersicum) secretome.

机构信息

Unité de Génétique et Amélioration des Fruits et Légumes, INRA, BP 94, 84143 Montfavet, France.

出版信息

J Plant Res. 2013 Mar;126(2):251-66. doi: 10.1007/s10265-012-0516-4. Epub 2012 Aug 15.

Abstract

In fleshy fruits, fruit texture features are mainly related to chemical and mechanical properties of the cell wall. The description of tomato fruit cell wall proteome is a first step in the process of linking tomato genetic variability to fruit texture phenotypes. In this study, the proteome of 3 ripe tomato fruit lines with contrasted texture traits were studied. Weakly bound and soluble proteins were extracted from cell wall of the three cultivars using both destructive and non-destructive methods, respectively. Wall proteins were separated on 1D-PAGE, bands were excised and identified by LC-MS/MS. The software SignalP which searches for the leader peptide was used to discriminate between protein with or without signal peptide. In combine, seventy-five different cell wall proteins were recorded for both weakly bound and soluble cell wall fractions. The major identified functions included several proteins acting on polysaccharides, proteins involved in "lipid metabolism", proteins having interacting domain, "oxido-reductases" and "proteases" whose putative roles in ripe fruit cell wall is discussed. Several proteins with no obvious signal peptide, however, with accumulating supportive evidences to be bona fide wall proteins, were also identified. Some variations in protein repertories were observed among the lines, demonstrating the possibility to characterize cell wall protein genetic variability by such in muro proteome analyses.

摘要

在肉质果实中,果实质地特征主要与细胞壁的化学和机械性质有关。描述番茄果实细胞壁蛋白质组是将番茄遗传变异与果实质地表型联系起来的第一步。在这项研究中,研究了 3 种质地特性不同的成熟番茄品系的蛋白质组。分别使用破坏性和非破坏性方法从三种品种的细胞壁中提取弱结合和可溶蛋白质。在 1D-PAGE 上分离细胞壁蛋白,通过 LC-MS/MS 切割和鉴定条带。用于区分具有或不具有信号肽的蛋白质的软件 SignalP 用于搜索前导肽。在结合中,记录了 75 种不同的细胞壁蛋白,用于弱结合和可溶细胞壁部分。主要鉴定的功能包括几种作用于多糖的蛋白质、参与“脂质代谢”的蛋白质、具有相互作用域的蛋白质、“氧化还原酶”和“蛋白酶”,它们在成熟果实细胞壁中的潜在作用被讨论。然而,还鉴定了一些没有明显信号肽但具有积累支持证据的真正细胞壁蛋白。在品系之间观察到蛋白质谱的一些变化,表明通过这种在壁内的蛋白质组分析来表征细胞壁蛋白质遗传变异的可能性。

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