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EC 2.4.1.22 Details
EC number
2.4.1.22
Accepted name
lactose synthase
Reaction
UDP-α-D-galactose + D-glucose = UDP + lactose
Other name(s)
UDP-galactose—glucose galactosyltransferase,
N-acetyllactosamine synthase,
uridine diphosphogalactose-glucose galactosyltransferase,
lactose synthetase,
UDP-galactose:D-glucose 4-β-D-galactotransferase,
UDP-galactose:D-glucose 4-β-D-galactosyltransferase
Systematic name
UDP-α-D-galactose:D-glucose 4-β-D-galactosyltransferase
CAS registry number
9030-11-9
Comment
The enzyme is a complex of two proteins, A and B. In the absence of the B protein (α-lactalbumin), the enzyme catalyses the transfer of galactose from UDP-α-D-galactose to N-acetylglucosamine (EC 2.4.1.90 N-acetyllactosamine synthase).
History
created 1965
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