P4591
Pyruvate Oxidase from microorganisms
lyophilized powder, ≥1.5 U/mg
Synonym(e):
Pyruvate:oxygen oxidoreductase (phosphorylating)
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CAS-Nummer:
UNSPSC Code:
12352204
NACRES:
NA.54
EC Number:
232-644-5
MDL number:
Specific activity:
≥1.5 U/mg
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Dieser Artikel | |||
|---|---|---|---|
| specific activity ≥1.5 U/mg | specific activity ≥35 units/mg protein (biuret) | specific activity ≥50 units/mg protein | specific activity 5-15 units/mg protein |
| form lyophilized powder | form lyophilized powder | form lyophilized powder | form lyophilized powder |
| mol wt ~260 kDa | mol wt - | mol wt 64 kDa | mol wt octomer 600 kDa by sedimentation equilibrium |
| storage temp. −20°C | storage temp. −20°C | storage temp. −20°C | storage temp. −20°C |
| Quality Level 200 | Quality Level 200 | Quality Level 200 | Quality Level 200 |
General description
Isoelectric point : 4.3
Michaelis constant : 3.4 X 10-4M (Pyruvate)
Inhibitors : Fe++,Zn++,Cu++,Ag+,Hg++
Optimum pH : 5.7
Optimum temperature : 65oC
pH Stability : pH 5.7 - 6.5 (25oC, 20hr)
Thermal stability : below 45oC (pH 6.0, 15min)
Michaelis constant : 3.4 X 10-4M (Pyruvate)
Inhibitors : Fe++,Zn++,Cu++,Ag+,Hg++
Optimum pH : 5.7
Optimum temperature : 65oC
pH Stability : pH 5.7 - 6.5 (25oC, 20hr)
Thermal stability : below 45oC (pH 6.0, 15min)
Application
Pyruvate Oxidase from microorganisms has been used in the Amplex Red-based fluorescence assay for pyruvate. It has also been used in developing near real-time continuous detection system for pyruvate.
Pyruvate Oxidase (PoxB) converts pyruvate directly to acetate and CO2. It is used to study pyruvate metabolism. It is used to study aerobic metabolism of bacterium, such as Lactobacillus plantarumand Streptococcus pneumoniae. Pyruvate Oxidase is used for enzymatic determination of pyruvate, GOT, and GPT in clinical analysis.
Biochem/physiol Actions
Pyruvate Oxidase oxidises pyruvate to form acetate, hydrogen peroxide and carbondioxide. Pyruvate oxidase requires flavin adenine dinucleotide (FAD), thiamine pyrophosphate (TPP) and magnesium as cofactors for its catalytic activity. Pyruvate oxidase is activated by the cofactor thiamine.
Pyruvate Oxidase consists of four subunits with identical molecular weights. PoxB reacts with certain aldehydes and phosphate can be replaced by arsenate. Oxygen as well as several artificial compounds can function as electron acceptors. Pyruvate Oxidase is activated by phospholipids as well as monomeric and micellar amphiphiles.
Physical form
Lyophilized powder containing FAD and sugar as stabilizer
Other Notes
One unit will produce 1.0 μmole of H2O2 per min during the conversion of pyruvate and phosphate to acetylphosphate and CO2 at pH 5.7 at 37 °C.
signalword
Danger
hcodes
pcodes
Hazard Classifications
Resp. Sens. 1
Lagerklasse
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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Amit Priyadarshi et al.
Biochemical and biophysical research communications, 380(4), 797-801 (2009-04-03)
MenD (2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexadiene-1-carboxylate) synthase belongs to the superfamily of thiamin diphosphate-dependent decarboxylases, which converts isochorismate and 2-oxoglutarate to SHCHC, pyruvate, and carbon dioxide. Here, we report the first crystal structure of apo-MenD from Escherichia coli determined in tetragonal crystal form. The
Lan-yan Zheng et al.
International journal of oral science, 3(2), 82-89 (2011-04-13)
The objective of this study was to characterize the oxygen dependent regulation of pyruvate oxidase (SpxB) gene expression and protein production in Streptococcus sanguinis (S. sanguinis). SpxB is responsible for the generation of growth-inhibiting amounts of hydrogen peroxide (H2O2) able
Rachel Benisty et al.
Biochimica et biophysica acta, 1801(9), 1098-1104 (2010-07-06)
FabF elongation condensing enzyme is a critical factor in determining the spectrum of products produced by the FASII pathway. Its active site contains a critical cysteine-thiol residue, which is a plausible target for oxidation by H2O2. Streptococcus pneumoniae produces exceptionally
A sensitive fluorimetric assay for pyruvate
Zhu A, et al.
Analytical Biochemistry, 396(1), 146-151 (2010)
Lei Chen et al.
Microbiology (Reading, England), 157(Pt 1), 13-20 (2010-09-18)
Hydrogen peroxide (H(2)O(2)), an important substance produced by many members of the genus Streptococcus, plays important roles in virulence and antagonism within a microbial community such as oral biofilms. The spxB gene, which encodes pyruvate oxidase, is involved in H(2)O(2)
Protokolle
Protocol for Assay Procedure for Pyruvate Oxidase Bacterial
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