H4502
Hexokinase from Saccharomyces cerevisiae
Type F-300, lyophilized powder, ≥130 units/mg protein (biuret)
동의어(들):
Hexokinase D, Hexokinasetype IV, ATP:D-Hexose-6-phosphotransferase, Hexokinase from yeast
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크기 선택
제품정보 (DICE 배송 시 비용 별도)
CAS 번호:
UNSPSC Code:
12352204
eCl@ss:
32160410
EC Number:
232-611-5
NACRES:
NA.54
MDL number:
Specific activity:
≥130 units/mg protein (biuret)
Biological source:
Saccharomyces cerevisiae
biological source
Saccharomyces cerevisiae
type
Type F-300
form
lyophilized powder
specific activity
≥130 units/mg protein (biuret)
mol wt
110 kDa
purified by
crystallization
storage condition
(Keep container tightly closed in a dry and well-ventilated place)
color
white
anion traces
sulfate (SO42-): free
foreign activity
ATPase, myokinase, glucose-6-phosphate dehydrogenase, 6-phosphogluconic dehydrogenase and phosphoglucose isomerase ≤0.01%
storage temp.
−20°C
Quality Level
Gene Information
bakers yeast ... HXK1(850614), HXK2(852639)
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General description
Research area: Cell Signaling
The hexokinase 1 (HXK1) gene is mapped to the Saccharomyces cerevisiae chromosome VI. HXK1 is ubiquitously expressed in mammalian tissues and is abundant in the brain, erythrocytes, lymphocytes, and fibroblasts.
The hexokinase 1 (HXK1) gene is mapped to the Saccharomyces cerevisiae chromosome VI. HXK1 is ubiquitously expressed in mammalian tissues and is abundant in the brain, erythrocytes, lymphocytes, and fibroblasts.
Application
Hexokinase has been used:
- for digesting glucose for measuring glucose content in the root and stem samples of Quercus velutina
- to treat ADP (adenosine diphosphate) solution along with D-glucose to remove the contaminating ATP (adenosine triphosphate)
- in 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid buffer (pH 7.5) for ADP-[13CU]glucose synthesis
Biochem/physiol Actions
Catalyzes the phosphorylation of D-hexose sugars at the C6 position utilizing ATP as a phosphate source.
The rate of phosphorylation varies with different hexoses (pH 7.5, 30 °C).
D-fructose KM: 0.33 mM
D-glucose KM: 0.12 mM
D-mannose KM: 0.05 mM
Yeast hexokinase exists as two similar isoforms, PI and PII (A and B), with isoelectric points of 5.25 and 4, respectively.
Molecular Weight: ~ 54 kDa (monomer)
~110 kDa (dimer)
Optimal pH: 7.5 to 9.0
Extinction Coefficient: E1% = 8.85 (PI) and 9.47 (PII) at 280 nm
Activators: Hexokinase requires Mg2+ ions (KM = 2.6 mM) for activity. Hexokinase is activated by catecholamines and related compounds.
Inhibitors: sorbose-1-phosphate, polyphosphates, 6-deoxy-6-fluoroglucose, 2-C-hydroxy-methylglucose, xylose, lyxose, and thiol reactive compounds (Hg2+ and 4-chloromercuribenzoate)
The rate of phosphorylation varies with different hexoses (pH 7.5, 30 °C).
D-fructose KM: 0.33 mM
D-glucose KM: 0.12 mM
D-mannose KM: 0.05 mM
Yeast hexokinase exists as two similar isoforms, PI and PII (A and B), with isoelectric points of 5.25 and 4, respectively.
Molecular Weight: ~ 54 kDa (monomer)
~110 kDa (dimer)
Optimal pH: 7.5 to 9.0
Extinction Coefficient: E1% = 8.85 (PI) and 9.47 (PII) at 280 nm
Activators: Hexokinase requires Mg2+ ions (KM = 2.6 mM) for activity. Hexokinase is activated by catecholamines and related compounds.
Inhibitors: sorbose-1-phosphate, polyphosphates, 6-deoxy-6-fluoroglucose, 2-C-hydroxy-methylglucose, xylose, lyxose, and thiol reactive compounds (Hg2+ and 4-chloromercuribenzoate)
Hexokinase catalyzes the rate-limiting first step of glycolysis, which involves the phosphorylation of glucose.
Physical form
Lyophilized powder containing approx. 15% sodium citrate
Preparation Note
Reconstitute with water or citrate buffer, pH 7.0. Studies have shown excellent stability during repeated freezing and thawing over a period of at least 30 days.
Analysis Note
A mixture of isoenzymes.
Other Notes
One unit will phosphorylate 1.0 μmole of D-glucose per min at pH 7.6 at 25 °C.
저장 등급
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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Daiki Kubota et al.
Ophthalmic genetics, 41(6), 629-638 (2020-08-21)
The hexokinase 1 (HK1) gene encodes one of the four human hexokinases that play essential roles in glucose metabolism. Recently, several cases of E847K mutation in the HK1 gene were reported to cause inherited retinal dystrophy. The purpose of this
Manfred Schmid et al.
Molecular cell, 21(3), 379-391 (2006-02-04)
Our previous work identified the inner basket of the NPC as a physical activation/protection station for force-tethered, epigenetically silenced genes. Here we show that a specific nucleopore-to-gene-promoter interaction (Nup-PI) is an early physiological event of gene activation. Nup-PI was discovered
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You H, et al.
Nucleic Acids Research, 45(1), 206-214 (2016)
J A Diderich et al.
Applied and environmental microbiology, 67(4), 1587-1593 (2001-04-03)
Hexokinase II is an enzyme central to glucose metabolism and glucose repression in the yeast Saccharomyces cerevisiae. Deletion of HXK2, the gene which encodes hexokinase II, dramatically changed the physiology of S. cerevisiae. The hxk2-null mutant strain displayed fully oxidative
프로토콜
Measure hexokinase activity using a continuous spectrophotometric rate-determination assay at 340 nm, catalyzing D-hexose sugar phosphorylation using ATP.
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