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Lactose Synthase MeSH Descriptor Data 2022


MeSH Heading
Lactose Synthase
Tree Number(s)
D05.500.299
D08.811.913.400.450.400.500
Unique ID
D007788
RDF Unique Identifier
http://id.nlm.nih.gov/mesh/D007788
Scope Note
An enzyme complex that catalyzes the transfer of GALACTOSE from UDP GALACTOSE to GLUCOSE, forming LACTOSE. The enzyme complex is composed of a B subunit, ALPHA-LACTALBUMIN, which changes the substrate specificity of the A subunit, N-ACETYLLACTOSAMINE SYNTHASE, from N-ACETYLGLUCOSAMINE to glucose making lactose synthesis the preferred reaction.
Entry Term(s)
Lactose Synthetase
N-Acetylgucosamide 1-4 beta Galactosyl Transferase
Registry Number
EC 2.4.1.22
Related Numbers
9030-11-9
CAS Type 1 Name
UDPgalactose:D-glucose 4-beta-D-galactosyltransferase
Previous Indexing
Glucosyltransferases (1966-1971)
Lactation (1966-1971)
Ligases (1966-1971)
Transferases (1966-1971)
Public MeSH Note
92; was LACTOSE SYNTHETASE 1974-91
Online Note
use LACTOSE SYNTHASE to search LACTOSE SYNTHETASE 1972-91 (as Prov 1972-73)
History Note
92: was LACTOSE SYNTHETASE 1972-91 (Prov 1972-73)
Date Established
1974/01/01
Date of Entry
1999/01/01
Revision Date
2015/06/12
Lactose Synthase Preferred
N-Acetylgucosamide 1-4 beta Galactosyl Transferase Narrower
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