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G4256

Sigma-Aldrich

Galactose-1-phosphate Uridyltransferase from galactose-adapted yeast

Type IV, lyophilized powder, 20-60 units/mg protein (modified Warburg-Christian)

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Synonym(s):
GALT, UDP glucose:α-D-galactose-1-phosphate uridyltransferase
CAS Number:
Enzyme Commission number:
MDL number:
UNSPSC Code:
12352204
NACRES:
NA.54

type

Type IV

Quality Level

form

lyophilized powder

specific activity

20-60 units/mg protein (modified Warburg-Christian)

composition

Protein, 15-35%

foreign activity

6-phosphogluconate dehydrogenase ≤0.5%
UDP glucose pyrophosphorylase and galactokinase ≤0.2%

storage temp.

−20°C

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Biochem/physiol Actions

Galactose-1-phosphate uridyltransferase (GALT) facilitates the simultaneous conversion of uridine diphosphoglucose (UDP-glucose) and galactose-1-phosphate (gal-1P) to uridine diphosphogalactose (UDP-galactose) and glucose-1-phosphate. Classic Galactosemia (CG) is an inherited metabolic condition caused by deficiency of GALT activity.

Unit Definition

One unit will form 1.0 μmole of glucose 1-phosphate from UDP-glucose, galactose 1-phosphate and NADP+ per min at pH 8.7 at 25 °C as detected by a coupled system using phosphoglucomutase.

Physical form

Contains buffer salts as citrate and reduced glutathione

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

常规特殊物品

Certificates of Analysis (COA)

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E Laumonier et al.
Journal francais d'ophtalmologie, 28(5), 490-496 (2005-06-25)
Galactosemia is an inherited metabolic disorder due to a defect in one of the three enzymes required to fully metabolize the galactose in glucose: the galactose 1-phosphate uridyltransferase. Because this enzyme is present in the normal foetal liver since the
I Saira Mian et al.
BMC bioinformatics, 7, 305-305 (2006-06-20)
REX1 and REX2 are protein components of the RNA editing complex (the editosome) and function as exouridylylases. The exact roles of REX1 and REX2 in the editosome are unclear and the consequences of the presence of two related proteins are
Jason G McCoy et al.
Biochemistry, 45(10), 3154-3162 (2006-03-08)
The X-ray crystal structure of the At5g18200.1 protein has been determined to a nominal resolution of 2.30 A. The structure has a histidine triad (HIT)-like fold containing two distinct HIT-like motifs. The sequence of At5g18200.1 indicates a distant family relationship
Mohamed Jama et al.
The Journal of molecular diagnostics : JMD, 9(5), 618-623 (2007-09-22)
Classic galactosemia is an autosomal recessive inherited error of galactose metabolism. It is caused by lack of galactose-1-phosphate uridyl transferase, an enzyme that is required to metabolize galactose-1-phosphate to uridine diphosphate galactose. The build up of galactose-1-phosphate is toxic at
Galactose 1-phosphate uridylyltransferase. Isolation of a uridylyl-enzyme intermediate.
L J Wong et al.
The Journal of biological chemistry, 249(7), 2322-2324 (1974-04-10)

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