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New lectin isolated from the tropical sponge Haliclona (Reniera) implexiformis (Hechtel, 1965) shows antibiofilm effect. | LitMetric

New lectin isolated from the tropical sponge Haliclona (Reniera) implexiformis (Hechtel, 1965) shows antibiofilm effect.

An Acad Bras Cienc

Universidade Federal do Ceará, Departamento de Engenharia de Pesca, Laboratório de Biotecnologia Marinha (BioMar-Lab), Avenida Humberto Monte, s/n, Campus do Pici, Bloco 871, 60440-970 Fortaleza, CE, Brazil.

Published: April 2023

AI Article Synopsis

Article Abstract

A lectin from the marine sponge Haliclona (Reniera) implexiformis (HiL) was isolated by affinity chromatography on Sepharose™ matrix. HiL showed specificity for galactose and its derivatives. The glycoproteins porcine stomach mucin (PSM) and bovine stomach mucin (BSM) were potent inhibitors. Hemagglutinating activity of the lectin was maximal between pH 5.0 and 9.0. The lectin remained active until 60°C. The presence of CaCl2 and EDTA did not affect the hemagglutinating activity. In SDS-PAGE, HiL showed a single band of 20 kDa under reduced conditions, whereas in the non-reducing conditions, it showed a band of 20 kDa and one additional band of 36 kDa. The average molecular mass determined by Electrospray Ionization Mass Spectrometry (ESI-MS) was 35.874 ± 2 Da in native and non-reducing conditions, whereas carboxyamidomethylated-lectin showed 18,111 Da. These data indicated that HiL consists in a dimer formed by identical subunits linked by disulfide bonds. Partial amino acid sequence of HiL was determined by mass spectrometry, and revealed that it is a new type of lectin, which showed no similarity with any protein. Secondary structure consisted of 6% α-helice, 31% β-sheet, 18% β-turn and 45% random coil. HiL showed significant reduction in the number of viable cells of Staphylococcus biofilms.

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Source
http://dx.doi.org/10.1590/0001-3765202320220379DOI Listing

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