Serine protease inhibitor mediated peptide bond re-synthesis in diverse protein molecules |
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Authors: | Sharma Amit Radha Kishan K V |
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Affiliation: | Institute of Microbial Technology, Sector 39-A, Chandigarh 160 036, India. |
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Abstract: | Protease inhibitors have been extensively used in research to prevent unwanted degradation of proteins during purification and analysis. Here, we report a remarkable discovery of protease inhibitor mediated reformation of peptide bonds by the serine protease inhibitor, PMSF in a diverse set of proteolyzed molecules. Interestingly, the religation reaction in the presence of PMSF occurs in a very short time period and with very high yields of the religated product. We also investigate the plausible mechanism of such a reaction and demonstrate through biochemical studies and X-ray crystallography that proximity of reacting termini is essential for the feasibility of this reaction. |
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