Institut National De La Recherche Agronomique;Universite Paul Sabatier Toulouse III;Institut National des Sciences Appliquees de Toulouse;Centre National de la Recherche Scientifique
The invention relates to: —a protein having dextran-saccharase activity and the sequence SEQ ID NO: 1 for an amino acid sequence; —a protein having dextran-saccharase activity and the sequence SEQ ID NO: 2 for an amino acid sequence; —a complex containing a substrate and a protein with dextran-saccharase activity —a method for synthesizing dextrans; and —dextrans. The invention also relates to a method for synthesizing gluco-oligosaccharides and gluco-conjugates and to the resulting products.