A Monomeric Mannose-Binding Lectin from Inner Shoots of the Edible Chive (Allium tuberosum)

Autor: Ying-Wai Lam, T. B. Ng
Rok vydání: 2001
Předmět:
Zdroj: Journal of Protein Chemistry. 20:361-366
ISSN: 1573-4943
0277-8033
DOI: 10.1023/a:1012224602848
Popis: A mannose-binding lectin was isolated from the inner shoots of the chive Allium tuberosum. The procedure involved aqueous extraction, (NH4)2SO4 precipitation, dialysis to remove (NH4)2SO4, affinity chromatography on mannose-agarose, ion exchange chromatography on SP-Sepharose, gel filtration on Superdex 75, and ion exchange chromatography on Mono S. Lectin activity was adsorbed on mannose-agarose, SP-Sepharose, and Mono S. The lectin demonstrated a molecular weight of 13 kDa in sodium dodecyl sulfate-polyacrylamide gel electrophoresis and gel filtration, indicating that it is a single-chain protein. N-terminal sequence analysis revealed its remarkable homology to Allium cepa lectin and similarity to a lesser extent to lectins from members of the Amaryllidaceae, Orchidaceae, and Liliaceae. The lectin manifested mitogenic activity in murine splenocytes and inhibitory activity against human immunodeficiency virus type 1 reverse transcriptase.
Databáze: OpenAIRE