Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/73757
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Type: Journal article
Title: Purification and characterization of alkaline pectin lyase from a newly isolated Bacillus clausii and its application in elicitation of plant disease resistance
Author: Li, Z.
Bai, Z.
Zhang, B.
Li, B.
Jin, B.
Zhang, M.
Lin, F.
Zhang, H.
Citation: Applied Biochemistry and Biotechnology, 2012; 167(8):2241-2256
Publisher: Humana Press Inc
Issue Date: 2012
ISSN: 0273-2289
1559-0291
Statement of
Responsibility: 
Zuming Li, Zhihui Bai, Baoguo Zhang, Baojv Li, Bo Jin, Michael Zhang, Francis Lin and Hongxun Zhang
Abstract: Alkaline pectin lyase (PNL) shows potential as a biological control agent against several plant diseases. We isolated and characterized a new Bacillus clausii strain that can produce 4,180 U/g of PNL using sugar beet pulp as a carbon source and inducer. The PNL was purified to apparent homogeneity using ultrafiltration, ammonium sulfate fractionation, DEAE Sepharose Fast Flow, and Sephadex G-75 gel filtration. The purified PNL was found to be a monomeric protein with a molecular weight of 35 kDa, as determined by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). It demonstrated optimal activity with K m of 0.87 mg/ml at pH 10.0 and 60 °C. The enzyme is stable in the pH range of 8.0–10.0 and temperature ≤40 °C. Ca2+ was found to stimulate the enzymatic activity of the PNL by up to 410 %. Mass spectrometric results gave 38 % match coverage with pectate lyase from B. clausii KSM-K16 (gi|56961845). The PNL was found to elicit disease resistance in cucumber seedlings, suggesting that it may have applications in biocontrol and sustainable agriculture.
Keywords: Bacillus clausii; Alkaline pectin lyase; sugar beet pulp; mass spectrometric sequencing; plant disease resistance
Rights: © Springer Science+Business Media, LLC 2012
RMID: 0020121704
DOI: 10.1007/s12010-012-9758-9
Appears in Collections:Chemical Engineering publications
Environment Institute publications

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