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Merck
모든 사진(1)

주요 문서

H5000

Sigma-Aldrich

Hexokinase from Saccharomyces cerevisiae

Type III, lyophilized powder, ≥25 units/mg protein (biuret)

동의어(들):

ATP:D-Hexose-6-phosphotransferase, Hexokinase from yeast

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About This Item

CAS Number:
효소 위원회 번호:
EC Number:
MDL number:
UNSPSC 코드:
12352204
eCl@ss:
32160410

유형

Type III

형태

lyophilized powder

특이 활성도

≥25 units/mg protein (biuret)

분자량

dimer 110 kDa

UniProt 수납 번호

외래 활성

glucose-6-phosphate dehydrogenase and phosphoglucose isomerase ≤10%

저장 온도

−20°C

유전자 정보

bakers yeast ... HXK1(850614) , HXK2(852639)

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생화학적/생리학적 작용

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)

단위 정의

One unit will phosphorylate 1.0 μmole of D-glucose per min at pH 7.6 at 25 °C, unless otherwise indicated below.

물리적 형태

Lyophilized powder containing approx. 15% sodium citrate

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point (°F)

Not applicable

Flash Point (°C)

Not applicable

개인 보호 장비

Eyeshields, Gloves, type N95 (US)


시험 성적서(COA)

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문서 라이브러리 방문

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Markus Weiler et al.
Proceedings of the National Academy of Sciences of the United States of America, 111(1), 409-414 (2013-12-25)
A hypoxic microenvironment induces resistance to alkylating agents by activating targets in the mammalian target of rapamycin (mTOR) pathway. The molecular mechanisms involved in this mTOR-mediated hypoxia-induced chemoresistance, however, are unclear. Here we identify the mTOR target N-myc downstream regulated
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Cancer cell, 24(1), 120-129 (2013-07-13)
The prosurvival protein BCL-2 is frequently overexpressed in estrogen receptor (ER)-positive breast cancer. We have generated ER-positive primary breast tumor xenografts that recapitulate the primary tumors and demonstrate that the BH3 mimetic ABT-737 markedly improves tumor response to the antiestrogen
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Proceedings of the National Academy of Sciences of the United States of America, 111(17), 6335-6340 (2014-04-16)
MicroRNAs (miRNAs) are major posttranscriptional regulators of a wide variety of biological processes. However, redundancy among most miRNAs has made it difficult to identify their in vivo functions. We previously demonstrated that global inhibition of miRNA biogenesis in Xenopus resulted
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PLoS genetics, 9(6), e1003563-e1003563 (2013-06-21)
Multiple Acyl-CoA Dehydrogenase Deficiency (MADD) is a severe mitochondrial disorder featuring multi-organ dysfunction. Mutations in either the ETFA, ETFB, and ETFDH genes can cause MADD but very little is known about disease specific mechanisms due to a paucity of animal

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