title: Purification and characterization of a lectin from endophytic fungus Fusarium solani having complex sugar specificity.
abstract: A lectin from the mycelial extract of an endophytic strain of Fusarium solani was purified. Its hemagglutinating activity was inhibited by glycoproteins possessing N-linked as well as O-linked glycans. The thermodynamics and kinetics of binding of glycans and glycoproteins to F. solani lectin was studied using surface plasmon resonance. The lectin showed high affinity for asialofetuin, asialomucin, asialofibrinogen, and thyroglobulin; and comparatively low affinity for mucin, fetuin, fibrinogen, and holotransferrin. Glycoproteins showed several fold higher affinity than their corresponding glycans with significant contribution from enthalpy and positive entropy, suggesting the involvement of non-polar protein-protein interaction. Moreover, the higher affinity of the glycoproteins was due to their faster association rates and low activation energy.
authors.affiliation: Division of Biochemical Sciences, National Chemical Laboratory, Pune 411 008, India.
authors.forename: Feroz
authors.initials: F
authors.lastname: Khan
authors.forename: Absar
authors.initials: A
authors.lastname: Ahmad
authors.forename: M Islam
authors.initials: MI
authors.lastname: Khan
mesh_terms: D005670:Fusarium / Q000737:chemistry*; D006023:Glycoproteins / Q000737:chemistry; D006384:Hemagglutination; D007700:Kinetics; D037102:Lectins / Q000737:chemistry* / Q000302:isolation & purification; D011134:Polysaccharides / Q000737:chemistry; D011485:Protein Binding; D020349:Surface Plasmon Resonance; D013816:Thermodynamics
chemical_list: D006023:Glycoproteins; D037102:Lectins; D011134:Polysaccharides