Inenzymology,analternansucrase(EC2.4.1.140) is anenzymethatcatalyzesachemical reactionthat transfers anAlpha -D-glucosyl residuefromsucrosealternately to the 6- and 3-positions of the non-reducing terminal residue of an Alpha -D-glucan,thereby creating a glucan with alternating Alpha -1,6- and Alpha -1,3-bonds. The name "alternan" was coined in 1982 (Cote & Robyt) for the glucan based on its alternating linkage structure.
| Alternansucrase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 Alternansucrase (dextransucrase) monomer, Leuconostoc citreum | |||||||||
| Identifiers | |||||||||
| EC no. | 2.4.1.140 | ||||||||
| CAS no. | 100630-46-4 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDBstructures | RCSB PDBPDBePDBsum | ||||||||
| |||||||||
This enzyme belongs to the family ofglycosyltransferases,specifically the hexosyltransferases. Thesystematic nameof this enzyme class issucrose:1,6(1,3)- Alpha -D-glucan 6(3)- Alpha -D-glucosyltransferase.Other names in common use includesucrose-1,6(3)- Alpha -glucan 6(3)- Alpha -glucosyltransferase,sucrose:1,6-, 1,3- Alpha -D-glucan 3- Alpha - and,and6- Alpha -D-glucosyltransferase.
References
edit- Cote GL, Robyt JF (1982). "Isolation and partial characterization of an extracellular glucansucrase fromLeuconostoc mesenteroidesNRRL B-1355 that synthesizes an alternating (1→6), (1→3)-α-D-glucan ".Carbohydr. Res.101(1): 57–74.doi:10.1016/S0008-6215(00)80795-8.PMID7060056.
