A protein extraction method for low protein concentration solutions compatible with the proteomic analysis of rubber particles

文献类型： 外文期刊

第一作者： Wang, Dan

作者： Wang, Dan;Sun, Yong;Tian, Weimin;Wang, Xuchu;Wang, Dan;Sun, Yong;Tong, Zheng;Yang, Qian;Chang, Lili;Meng, Xueru;Wang, Limin;Wang, Xuchu

作者机构：

关键词： Mass spectrometry;Plant proteomics;Protein extraction method;Rubber particle;Washing solution

期刊名称：ELECTROPHORESIS （ 影响因子：3.535； 五年影响因子：2.731 ）

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收录情况： SCI

摘要： The extraction of high-purity proteins from the washing solution (WS) of rubber particles (also termed latex-producing organelles) from laticifer cells in rubber tree for proteomic analysis is challenging due to the low concentration of proteins in the WS. Recent studies have revealed that proteins in the WS might play crucial roles in natural rubber biosynthesis. To further examine the involvement of these proteins in natural rubber biosynthesis, we designed an efficiency method to extract high-purity WS proteins. We improved our current borax and phenol-based method by adding reextraction steps with phenol (REP) to improve the yield from low protein concentration samples. With this new method, we extracted WS proteins that were suitable for proteomics. Indeed, compared to the original borax and phenol-based method, the REP method improved both the quality and quantity of isolated proteins. By repeatedly extracting from low protein concentration solutions using the same small amount of phenol, the REP method yielded enough protein of sufficiently high-quality from starting samples containing less than 0.02 mg of proteins per milliliter. This method was successfully applied to extract the rubber particle proteins from the WS of natural rubber latex samples. The REP-extracted WS proteins were resolved by 2DE, and 28 proteins were positively identified by MS. This method has the potential to become widely used for the extraction of proteins from low protein concentration solutions for proteomic analysis.

分类号： O646

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