In the depth of oligosaccharidic structural complexity The example of multiply branched glycans

C. Bliard (1)

1 ICMR - Institut de Chimie Moléculaire de Reims - UMR 7312

Random clivage of branched reserve polysaccharides composed of two different (malto-, m) and (isomalto-, i) linking types lead to complex oligomeric mixtures of various polymeric degree (DP). Each DP is a mixture of molecules containing potentially all combinations of (m) and/or (i) sub-structures. Industrial hydrolysis of starches polysaccharides produce syrups with a low DP (typically from 1 to 20). The number of potential oligosaccharidic structures accessible by random hydrolysis grow exponentially with the DP. The number of isomeric structures for each given DP (n) is a Catalan number, noted C(n), calculated as (2n choose n)/(n+1) = (2n)!/(n!(n+1)!). The calculation gives 2 isomers (maltose and isomaltose) for (DP2), 16796 deca-saccharides potential isomers (DP10) and more than 6 billions eicosasaccharide isomers (DP20).

Mots clés: malto-oligosaccharides; malto-isomalto-oligosaccharides; MOS; catalan numbers; dextrins

Domaines: Polymères; Alimentation et Nutrition

C. Bliard. In the depth of oligosaccharidic structural complexity The example of multiply branched glycans. 30th Joint Glycobiology Meeting, Oct 2019, lille, France. , 2019. ⟨hal-02332287⟩