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Purification and Characterization of a Lectin from the Indian Cultivar of French Bean Seeds

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A lectin specific for glucuronic acid and galacturonic acid has been isolated from seeds of the French bean Phaseolus vulgaris using a procedure that involved affinity chromatography on Affi-gel blue gel, fast protein liquid chromatography (FPLC)-ion exchange chromatography on Mono S, and FPLC-gel filtration on Superdex 200. The lectin was comprised of two 32-kDa subunits with substantial N-terminal sequence similarity to other Phaseolus lectins. The hemagglutinating activity of the lectin was stable within the pH range of 1-13 and the temperature range of 10-60 C. The lectin neither exhibited any antiproliferative activity against tumor cells nor stimulated nitric oxide production by murine peritoneal macrophages at doses as high as 1mM , The lectin failed to evoke any mitogenic response from murine splenocytes as measured by [3H-methyl]-thymidine incorporation and did not inhibit the activity of HIV-1 reverse transcriptase. The lectin had no antifungal activity.

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Keywords: Indian cultivar of French bean; Lectin; glucuronic acid and galacturonic acid specific; isolation; seeds; thermostable

Document Type: Research Article

Publication date: 01 February 2010

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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