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Pakistan Journal of Biological Sciences

Year: 2002 | Volume: 5 | Issue: 3 | Page No.: 317-320
DOI: 10.3923/pjbs.2002.317.320
Partial Purification and Characterization of Protease from Germinating Wheat Seeds (Triticum aestivum L.)
Ranajit Kumar Shaha, N. K. Sana, N. Roy, K. K. Biswas and Abdullah Mamun

Abstract: Enzyme with proteolytic activity was found in the germinating wheat seeds (Triticum aestivum L.,). The enzyme activity appeared after 40 h of dark germination and reached its maximum value after 72 h and then declined sharply during further germination. After ion exchange chromatography, three protein peaks ( pro-I, pro-II & pro-III ) showed proteolytic activity and the degree of purification attained nearly 29-42 fold. Properties like optimum pH and optimum temperature of pro-I, pro-II and pro-III were 7.1, 6.4, 6.8 and 45°C, 43°C and 42°C, respectively. Mg2+ and Mn2+ had no effect on enzyme activities while EDTA, urea, Ca2+ had an activating effect. On the other hand Hg2+ and Fe2+ had strong inhibitory action on the extracted enzyme. The enzymes were found to be homogeneous as judged by Polyacrylamide disc gel electrophoresis. Molecular weights of pro-I, pro-II and pro-III were 1.08, 1.04 and 99kD and Km values were found to be 0.027, 0.032 and 0.037 mM respectively.

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How to cite this article
Ranajit Kumar Shaha, N. K. Sana, N. Roy, K. K. Biswas and Abdullah Mamun, 2002. Partial Purification and Characterization of Protease from Germinating Wheat Seeds (Triticum aestivum L.). Pakistan Journal of Biological Sciences, 5: 317-320.

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