Purama RK, Agrawal M, Goyal A. Stabilization of dextransucrase from Leuconostoc mesenteroides NRRL B-640.
Indian J Microbiol 2010;
50:57-61. [PMID:
22815573 DOI:
10.1007/s12088-010-0057-2]
[Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2008] [Accepted: 05/13/2008] [Indexed: 11/30/2022] Open
Abstract
Stabilization of dextransucrase from Leuconostoc mesenteroides NRRL B-640 with various stabilizers at different temperatures was studied. Dextransucrase was stable at lower temperatures (10-30°C) and lost the activity at above 30°C. The salts such as CaCl(2), CoCl(2) and MgCl(2) enhanced the dextransucrase activity. A 22% higher dextransucrase activity was obtained by 4 mM CoCl(2). The dextransucrase activity was lost by 50% at 1 mM EDTA. Urea denatured the enzyme and caused 45%, 90% and 98% loss of activity in 30 min when treated with 1 M, 3 M, and 5 M urea concentrations, respectively. Amongst the stabilizers Tween 80, glycerol, PEG-8000, dextran (500 kDa) and glutaraldehyde, Tween 80 provided the maximum stability at 30°C. In the presence of Tween 80 the enzyme lost only 8% activity at 30°C in 20 h but, it lost 65% of activity with out any stabilizer. The enzyme lost 92% of activity with in 4 days at 30°C and lost only 25% of activity at -20°C after 14 days.
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