Research Advances on Plant Thaumatin-like Protein Family

doi:10.13560/j.cnki.biotech.bull.1985.2017-0774

Abstract

Abstract: Thaumatin-like proteins（TLPs）play an important role in the process of plant resistance to stress. TLP family belongs to multi-gene one，and its molecular weight is small，and it has typical thaumatin domain of highly conserved. Typical TLP is composed of 16 cysteine residues forming eight disulfide bonds，and the three-dimensional structure possesses three conserved domains I，II，and III，forming a “V” shape acidic cleft on the surface，which ensure the catalytic function of TLP. Most species’ TLPs are classified into 10 clusters，and unbalanced amplification occurs in each cluster. TLPs possess antifungal，glucanase，and allergens activities，and can be induced by biotic or abiotic factors，such as hormones，stress signal，thus they play a role in the life process and plant innate immunity. Growingly TLP family genes with antifungal potential have been used to improve plant disease resistance through genetic engineering. In this study，we summarized recent researches on the structure，evolution，biological function and application of TLPs，so as to provide a theoretical basis for further study.

Key words: thaumatin-like protein, antifungal activity, transgene, plant stress

LIU Cha, HAN Li-hong, WANG Hai-bo, GAO Yong, TANG Li-zhou. Research Advances on Plant Thaumatin-like Protein Family[J]. Biotechnology Bulletin, 2018, 34(3): 9-17.

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