PROTEIN PROFILING AND ISOLATION OF BIOACTIVE HYDROLYSATES WITH ANTIOXIDANT ACTIVITY FROM STEM CALLUS TISSUE OF TINOSPORA CORDIFOLIA (WILLD.) MIERS EXPOSED TO CYCLODEXTRINAbstract
This study is aimed to evaluate the effects of different concentrations of cyclodextrin, an auxin stabilizing agent, on callus growth from the stem explants of Tinospora cordifolia and to assess the antioxidant properties of the bioactive hydrolysates of callus tissue using chymotrypsin, trypsin, pepsin, and papain. Cyclodextrin exerted a dose- and time-dependent effect on the callus growth. α-chymotrypsin hydrolysate showed the strongest 1,1-diphenyl-2-picrylhydrazyl (DPPH•) radical scavenging, while trypsin hydrolysate exhibited the highest 2,2’-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS•+) activity. Protein profiling of callus tissue revealed a few tissue-specific bands at 41, 30, 20, and 9 kDa with varying intensities. A growth medium containing sucrose has a specific impact on the expression of these polypeptides. Purification of 30 kDa polypeptide by Sephadex-G50 revealed distinct quantitative differences to different concentrations of cyclodextrin. This study suggested that T.cordifolia callus tissue protein hydrolysates exhibited antioxidant efficacy, leading to the development of a nutraceutical agent in promoting health.
V. Vikram, P. R. Kishore, A. Kalaiyarasan and N. Hariram *
Department of Biotechnology, Kalasingam Academy of Research Education, Krishnankoil, India.
10 December 2019
05 December 2020
22 December 2020
01 January 2021