• Source: Alternansucrase

In enzymology, an alternansucrase (EC 2.4.1.140) is an enzyme that catalyzes a chemical reaction that transfers an alpha-D-glucosyl residue from sucrose alternately 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.
This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is sucrose:1,6(1,3)-alpha-D-glucan 6(3)-alpha-D-glucosyltransferase. Other names in common use include sucrose-1,6(3)-alpha-glucan 6(3)-alpha-glucosyltransferase, sucrose:1,6-, 1,3-alpha-D-glucan 3-alpha- and, and 6-alpha-D-glucosyltransferase.




References



Cote GL, Robyt JF (1982). "Isolation and partial characterization of an extracellular glucansucrase from Leuconostoc mesenteroides NRRL 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. PMID 7060056.

Kata Kunci Pencarian:

• Alternansucrase
• Alternan
• Sucrose:1,6-, 1,3-α-D-glucan 3-α- and 6-α-D-glucosyltransferase
• Mutansucrase
• Glucansucrase
• List of EC numbers (EC 2)