title: Synthesis of benzaldehyde-functionalized glycans: a novel approach towards glyco-SAMs as a tool for surface plasmon resonance studies.
abstract: In recent years the interest in tools for investigating carbohydrate-protein (CPI) and carbohydrate-carbohydrate interactions (CCI) has increased significantly. For the investigation of CPI and CCI, several techniques employing different linking methods are available. Surface plasmon resonance (SPR) imaging is a most appropriate tool for analyzing the formation of self-assembled monolayers (SAM) of carbohydrate derivatives, which can mimic the glycocalyx. In contrast to the SPR imaging methods used previously to analyze CPI and CCI, the novel approach reported herein allows a facile and rapid synthesis of linker spacers and carbohydrate derivatives and enhances the binding event by controlling the amount and orientation of ligand. For immobilization on biorepulsive amino-functionalized SPR chips by reductive amination, diverse aldehyde-functionalized glycan structures (glucose, galactose, mannose, glucosamine, cellobiose, lactose, and lactosamine) have been synthesized in several facile steps that include olefin metathesis. Effective immobilization and the first binding studies are presented for the lectin concanavalin A.
authors.affiliation: Department of Chemistry, Faculty of Sciences, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Kopitzki
authors.forename: Knud J
authors.initials: KJ
authors.lastname: Jensen
authors.forename: Joachim
authors.initials: J
authors.lastname: Thiem
mesh_terms: D001547:Benzaldehydes / Q000138:chemical synthesis* / Q000737:chemistry; D002241:Carbohydrates / Q000737:chemistry*; D003208:Concanavalin A / Q000737:chemistry*; D008024:Ligands; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry; D037121:Plant Lectins / Q000737:chemistry* / Q000378:metabolism; D011134:Polysaccharides / Q000138:chemical synthesis* / Q000737:chemistry; D013237:Stereoisomerism; D020349:Surface Plasmon Resonance / Q000379:methods
chemical_list: D001547:Benzaldehydes; D002241:Carbohydrates; D008024:Ligands; D009942:Organometallic Compounds; D037121:Plant Lectins; D011134:Polysaccharides; D003208:Concanavalin A; C032175:benzaldehyde