A Protease Isolated from the Latex of Plumeria rubra Linn (Apocynaceae) 1: Purification and Characterization

Purpose: To isolate, purify and characterize protease from the latex of the plant. Methods: Protease was isolated from the latex of Plumeria rubra Linn using acetone precipitation method and purified by a sequence of DEAE cellulose column chromatography, followed by two successive column purificatio...

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Bibliographic Details
Published in:Tropical journal of pharmaceutical research 2011-12, Vol.10 (6)
Main Authors: Chanda, Indranil, Basu, Sanat Kumar, Dutta, Sadhan Kumar, Das, Smriti Rekha Chanda
Format: Article
Language:English
Subjects:
Characterization
Protease, Plumerin-R, Sulfhydryl, Purification
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Summary:Purpose: To isolate, purify and characterize protease from the latex of the plant. Methods: Protease was isolated from the latex of Plumeria rubra Linn using acetone precipitation method and purified by a sequence of DEAE cellulose column chromatography, followed by two successive column purification in Sephadex G-50 and Sephadex G-200. The molecular weight of the purified protease was determined by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDSPAGE). The protease was given a trivial name, Plumerin-R. Results: Plumerin-R showed a single protein band on SDS-PAGE and molecular weight was approximately 81.85 kDa. It remained active over a broad range of temperature but had optimum activity at 55 °C and pH 7.0 when casein was used as substrate. Activation of the protease by a thiol-activating agent indicated the presence of sulfhydryl as an essential group for its activity. Conclusion: A protease from the latex of Plumeria rubra Linn was purified to homogeneity by a simple purification procedure and then characterized.
ISSN:1596-5996
1596-9827
DOI:10.4314/tjpr.v10i6.2