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Identification of cis conformation natural rubber and proteins in Ficus altissima Blume latex

文献类型： 外文期刊

作者： Dai, Longjun 1 ; Yang, Hong 1 ; Zhao, Xizhu 1 ; Wang, Lifeng 1 ;

作者机构： 1.Minist Agr & Rural Affairs, Key Lab Biol & Genet Resources Rubber Tree, Haikou, Hainan, Peoples R China

2.State Key Lab Incubat Base Cultivat & Physiol Tro, Haikou, Hainan, Peoples R China

3.Chinese Acad Trop Agr Sci CATAS, Rubber Res Inst, Haikou, Hainan, Peoples R China

关键词： Ficus altissima; Latex; Natural rubber; Protein; Rubber particle

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：4.27； 五年影响因子：4.816 ）

ISSN： 0981-9428

年卷期： 2021 年 167 卷

页码：

收录情况： SCI

摘要： Ficus altissima Blume, a horticultural plant in tropical and warm subtropical regions, can produce natural rubber with comparable molecular weight to the Hevea brasiliensis rubber. The F. altissima latex has an acidic pH (about 4.89). The rubber particle size distribution is a unimodal profile, and the peak frequency is at a size of 4.5 mu m. The natural rubber of F. altissima was determined to be a cis conformation via C-13 NMR. The Mp (molecular weight of the peak maxima) of the deproteinized F. altissima rubber was 9.34 x 10(5) Da. LC-MS was used to identify the proteins of rubber particles and serum. The most abundant protein of the creamy rubber particle layer is an acid phosphatase, while the most abundant proteins of serum were an (R)-mandelonitrilelyase and a polygalacturonase inhibitor. Pharmaceutical proteins (ficins) or enzymes related to the biosynthesis of natural medicines (a cannabidiolic acid synthase and two lupeol synthase) were identified in F. altissima latex. The data of this study may be helpful for research on the functions of latex in latex-borne plants and the biosynthesis mechanism of natural rubber.

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