Syntèse chimio-enzymatique de glycoconjugués furanosidiques immuno-stimulants
Auteur / Autrice : | Ilona Chlubnová |
Direction : | Vincent Ferrières, Blanka Králová |
Type : | Thèse de doctorat |
Discipline(s) : | Chimie |
Date : | Soutenance en 2010 |
Etablissement(s) : | Rennes 1 en cotutelle avec Vysoká škola chemicko-technologická (Praze) |
Ecole(s) doctorale(s) : | École doctorale Sciences de la matière (Rennes ; 1996-2016) |
Partenaire(s) de recherche : | autre partenaire : Université européenne de Bretagne (2007-2016) |
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Résumé
Hexofuranoses are absent from mammals, but are present in numerous microorganisms, often highly pathogenic. This makes them very attractive targets for the development of new antimicrobial drugs. As an alternative to organic synthesis, the use of enzymes has been increasingly appreciated in the synthesis of glycoconjugates. Here we report the use of alpha-l-Arabinofuranosidase Araf51 for the synthesis of furanosyl-containing glycoconjugates. This enzyme was really efficient in catalysing oligomerisations of l-arabinofuranoside and d-galactofuranoside up to the formation of pentasaccharides, as well as in the synthesis of furanosides containing structurally modified d-galactofuranosides and pyrano-furano disaccharides. Many of synthesised compounds represented biologically relevant structures found in some clinically important pathogens. Biological tests proved that these neofuranosides have robust immunostimulatory properties and can become a potentially very useful new type of adjuvants.