Alternansucrase

From Wikipedia, the free encyclopedia

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.

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.

[edit] References

• IUBMB entry for 2.4.1.140
• BRENDA references for 2.4.1.140 (Recommended.)
• PubMed references for 2.4.1.140
• PubMed Central references for 2.4.1.140
• Google Scholar references for 2.4.1.140
• Cote GL, Robyt JF (1982). "Isolation and partial characterization of an extracellular glucansucrase from Leuconostoc mesenteroides NRRL B-1355 that synthesizes an alternating (1 goes to 6), (1 goes to 3)-alpha-D-glucan". Carbohydr. Res. 101: 57–74. PMID 7060056. 

[edit] External links

The CAS registry number for this enzyme class is 100630-46-4.

• IUBMB entry for 2.4.1.140

• KEGG entry for 2.4.1.140

• BRENDA entry for 2.4.1.140

• NiceZyme view of 2.4.1.140

• EC2PDB: PDB structures for 2.4.1.140

• PRIAM entry for 2.4.1.140

• PUMA2 entry for 2.4.1.140

• IntEnz: Integrated Enzyme entry for 2.4.1.140

• MetaCyc entry for 2.4.1.140

• Atomic-resolution structures of enzymes belonging to this class