Recombinant human Hexokinase 4 protein
Hexokinase is the first enzyme in the glycolytic pathway, catalyzing the transfer of a phosphoryl group from ATP to glucose to form glucose-6-phosphate and ADP. In mammals, four distinct enzymes -types 1 to 4 hexokinases- have been identified. The enzyme is found in most cells, but there is tissue specificity for the particular type of hexokinase. Hexokinase 4 is found in the liver and pancreatic beta-cells, where it is controlled by insulin (activation) and glucagon (inhibition) . In pancreatic beta-cells, type IV enzyme acts as a glucose sensor to modify insulin secretion. Hexokinase 4 is commonly called glucokinase. Recombinant human Hexokinase 4, fused to His-tag at N-terminus, was expressed in E.coli and purified by using conventional chromatography techniques.
Product Specifications
Specifications
Specific activity is > 2,000 pmol/min/ug. One unit will convert 1 pmole of D-Glucose to D-Glucose-6-phosphate per minute at pH8.0 at 37C.
Product Name Alternative
GCK, glucokinase, MODY2, Maturity onset diabetes of the young 2, Hexokinase 4, HK4, Hexokinase type IV, HK IV, Hexokinase-D
Expression System
E.coli
Antigen Species
Human
Tag
His-Tag
Applications
SDS-PAGE, Enzyme Activity
Concentration
1 mg/mL (determined by Bradford assay)
Endotoxin
< 1 EU per 1ug of protein (determined by LAL method)
Purity
> 95% by SDS-PAGE
Bioactivity
Specific activity is > 2,000pmol/min/ug. One unit will convert 1pmole of D-Glucose to D-Glucose-6-phosphate per minute at pH8.0 at 37C.
Molecular Weight
54.3 kDa (485aa)
Additionnal Information
References & Citations
Jon E. et al., (2003) J.Exp Biology. 206: 2049-2057
Storage Conditions
Can be stored at 2°C to 8°C for 1 week. For long term storage, aliquot and store at -20C to -80C. Avoid repeated freezing and thawing cycles.
Formulation
Liquid in. 20 mM Tris-HCl buffer (pH 8.0) containing 10% glycerol
Scientific Category
Signal Transduction
NCBI Accession Number
NP_000153
Uniprot Accession Number
P35557
Species
Human
AA Sequence
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