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EC Tree
IUBMB Comments Requires Mg2+. This enzyme is specific for phosphorylated vitamin B6 compounds: it acts not only on pyridoxal phosphate (PLP), but also on pyridoxine phosphate (PNP), pyridoxamine phosphate (PMP), 4-pyridoxic acid phosphate and 4-deoxypyridoxine phosphate. This reaction can also be carried out by EC 3.1.3.1 (alkaline phosphatase) and EC 3.1.3.2 (acid phosphatase), but these enzymes have very broad substrate specificities.
The taxonomic range for the selected organisms is: Homo sapiens The expected taxonomic range for this enzyme is: Bacteria, Eukaryota, Archaea
Synonyms
plpp/cin, plp phosphatase, pyridoxal phosphatase, pyridoxal phosphate phosphatase, plpase, pyridoxine phosphate phosphatase, pyridoxal-5'-phosphate phosphatase, pyridoxal-5'-phosphate phosphatase/chronophin, pnp phosphatase, pyridoxine 5'-phosphate phosphatase,
more
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pyridoxal phosphate phosphatase
-
pyridoxal-5'-phosphate phosphatase
pyridoxal-specific phosphatase
-
-
pyridoxal-5'-phosphate phosphatase
-
-
pyridoxal-5'-phosphate phosphatase
PLPP
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pyridoxal 5'-phosphate + H2O = pyridoxal + phosphate
pyridoxal 5'-phosphate + H2O = pyridoxal + phosphate
mechanism
-
pyridoxal 5'-phosphate + H2O = pyridoxal + phosphate
kinetic mechanism
-
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hydrolysis of phosphoric ester
-
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pyridoxal-5'-phosphate phosphohydrolase
Requires Mg2+. This enzyme is specific for phosphorylated vitamin B6 compounds: it acts not only on pyridoxal phosphate (PLP), but also on pyridoxine phosphate (PNP), pyridoxamine phosphate (PMP), 4-pyridoxic acid phosphate and 4-deoxypyridoxine phosphate. This reaction can also be carried out by EC 3.1.3.1 (alkaline phosphatase) and EC 3.1.3.2 (acid phosphatase), but these enzymes have very broad substrate specificities.
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4-deoxypyridoxine 5'-phosphate + H2O
4-deoxypyridoxine + phosphate
-
-
-
-
?
4-pyridoxic acid 5'-phosphate + H2O
4-pyridoxic acid + phosphate
N-(5'-phospho-4'-pyridoxyl)benzylamine + H2O
4'-pyridoxylbenzylamine + phosphate
-
-
-
-
?
N-(5'-phospho-4'-pyridoxyl)ethanolamine + H2O
4'-pyridoxylethanolamine + phosphate
-
-
-
-
?
N-(5'-phospho-4'-pyridoxyl)glycine + H2O
4'-pyridoxylglycine + phosphate
-
-
-
-
?
N-(5'-phospho-4'-pyridoxyl)phenylalanine + H2O
4'-pyridoxylphenylalanine + phosphate
-
much higher catalytic efficiency than with pyridoxine 5-phosphate
-
-
?
p-nitrophenyl phosphate + H2O
p-nitrophenol + phosphate
-
slow hydrolysis
-
-
?
pyridoxal 5'-phosphate + H2O
pyridoxal + phosphate
pyridoxal 5'phosphate + H2O
pyridoxal + phosphate
-
-
-
?
pyridoxal-5'-phosphate + H2O
pyridoxal + phosphate
pyridoxamine 5'-phosphate + H2O
pyridoxamine + phosphate
pyridoxine 5'-phosphate + H2O
pyridoxine + phosphate
additional information
?
-
4-pyridoxic acid 5'-phosphate + H2O
4-pyridoxic acid + phosphate
-
highest catalytic efficiency with 4-pyridoxic acid 5-phosphate and pyridoxal 5-phosphate
-
-
?
4-pyridoxic acid 5'-phosphate + H2O
4-pyridoxic acid + phosphate
-
the catalytic efficiency decreases in the following order: pyridoxal 5-phosphate, 4-pyridoxic acid 5-phosphate, pyridoxine 5-phosphate and pyridoxamine 5-phosphate
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-
?
pyridoxal 5'-phosphate + H2O
pyridoxal + phosphate
-
-
-
-
?
pyridoxal 5'-phosphate + H2O
pyridoxal + phosphate
-
-
-
?
pyridoxal 5'-phosphate + H2O
pyridoxal + phosphate
-
best substrate
-
-
?
pyridoxal 5'-phosphate + H2O
pyridoxal + phosphate
-
enzyme probably plays an important role in the hydrolysis of pyridoxal 5-phosphate to pyridoxal in erythrocytes, may be important in the regulation of pyridoxal 5-phosphate concentration
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-
?
pyridoxal 5'-phosphate + H2O
pyridoxal + phosphate
-
best substrate, a cysteinyl residue at or near the active site is essential for activity, there may be only one free Cys per subunit
-
-
?
pyridoxal 5'-phosphate + H2O
pyridoxal + phosphate
-
highest catalytic efficiency with pyridoxal 5-phosphate and 4-pyridoxic acid 5-phosphate
-
-
?
pyridoxal 5'-phosphate + H2O
pyridoxal + phosphate
highest specificity constant followed by pyridoxine 5-phosphate
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-
?
pyridoxal 5'-phosphate + H2O
pyridoxal + phosphate
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kinetic mechanism, random binding of pyridoxal phosphate and Mg2+, formation of a dead-end complex of phosphate with the enzyme-Mg complex
-
-
?
pyridoxal 5'-phosphate + H2O
pyridoxal + phosphate
-
mechanism, a covalent phosphoenzyme intermediate is formed during catalysis, may be an acylphosphate intermediate
-
-
?
pyridoxal 5'-phosphate + H2O
pyridoxal + phosphate
-
the catalytic efficiency decreases in the following order: pyridoxal 5-phosphate, 4-pyridoxic acid 5-phosphate, pyridoxine 5-phosphate and pyridoxamine 5-phosphate
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-
?
pyridoxal-5'-phosphate + H2O
pyridoxal + phosphate
-
-
-
-
?
pyridoxal-5'-phosphate + H2O
pyridoxal + phosphate
-
-
-
?
pyridoxamine 5'-phosphate + H2O
pyridoxamine + phosphate
-
-
-
?
pyridoxamine 5'-phosphate + H2O
pyridoxamine + phosphate
-
low hydrolysis rate
-
-
?
pyridoxamine 5'-phosphate + H2O
pyridoxamine + phosphate
-
the catalytic efficiency decreases in the following order: pyridoxal 5-phosphate, 4-pyridoxic acid 5-phosphate, pyridoxine 5-phosphate and pyridoxamine 5-phosphate
-
-
?
pyridoxine 5'-phosphate + H2O
pyridoxine + phosphate
-
-
-
-
?
pyridoxine 5'-phosphate + H2O
pyridoxine + phosphate
-
-
-
?
pyridoxine 5'-phosphate + H2O
pyridoxine + phosphate
second highest specificity constant after pyridoxal 5-phosphate
-
-
?
pyridoxine 5'-phosphate + H2O
pyridoxine + phosphate
-
the catalytic efficiency decreases in the following order: pyridoxal 5-phosphate, 4-pyridoxic acid 5-phosphate, pyridoxine 5-phosphate and pyridoxamine 5-phosphate
-
-
?
additional information
?
-
-
probably plays an important role in the regulation of vitamin B6 metabolism
-
-
?
additional information
?
-
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vitamin B6 metabolism
-
-
?
additional information
?
-
vitamin B6 metabolism, catabolism of pyridoxal 5-phosphate
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-
?
additional information
?
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vitamin B6 metabolism, catabolism of pyridoxal 5-phosphate
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-
?
additional information
?
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enzyme has phosphotransferase activity and transfers 20-25% of the phosphoryl group from either substrate to ethanol
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-
?
additional information
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hydrolyzes ten organic phosphates, but has maximum activity against pyridoxal phosphate
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?
additional information
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specifically dephosphorylates vitamin B6-phosphates, not: phenylphosphate, nucleotide phosphates, such as ATP, ADP, AMP, cAMP, FMN, phosphoamino acids, such as phosphoserine, phosphothreonine, phosphotyrosine, phosphoglycolate
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-
?
additional information
?
-
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specificity and active site properties, enzyme also catalyzes the dephosphorylation of 4-secondary amine derivatives of vitamin B6 phosphate, enzyme has the greatest catalytic efficiency with substrates that contain a negatively charged group on the 4-position of the pyridine ring, one or two positively charged groups at the active site of enzyme interacts with the substrates phosphate ester and 4-substituent, Arg and His residues are at or near the active site and may play roles in substrate binding and/or catalysis, very low activity with p-nitrophenylphosphate
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-
?
additional information
?
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very low activity with with p-nitrophenyl phosphate
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-
?
additional information
?
-
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very low activity with with p-nitrophenyl phosphate
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-
?
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pyridoxal 5'-phosphate + H2O
pyridoxal + phosphate
-
enzyme probably plays an important role in the hydrolysis of pyridoxal 5-phosphate to pyridoxal in erythrocytes, may be important in the regulation of pyridoxal 5-phosphate concentration
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-
?
pyridoxal 5'phosphate + H2O
pyridoxal + phosphate
-
-
-
?
pyridoxal-5'-phosphate + H2O
pyridoxal + phosphate
additional information
?
-
pyridoxal-5'-phosphate + H2O
pyridoxal + phosphate
-
-
-
-
?
pyridoxal-5'-phosphate + H2O
pyridoxal + phosphate
-
-
-
?
additional information
?
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probably plays an important role in the regulation of vitamin B6 metabolism
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-
?
additional information
?
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vitamin B6 metabolism
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-
?
additional information
?
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vitamin B6 metabolism, catabolism of pyridoxal 5-phosphate
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-
?
additional information
?
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vitamin B6 metabolism, catabolism of pyridoxal 5-phosphate
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-
?
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CaCl2
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enzyme has 17% as much activity with 1 mM CaCl2 than with MgCl2
Co2+
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similar activation as by Mg2+ and Ni2+, kinetics
Cu2+
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enzyme has 4% as much activity with 1 mM Cu2+ than with MgCl2
Ni2+
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similar activation as by Mg2+ and Co2+, kinetics
Zn2+
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activates somewhat at low concentrations, inhibits at higher concentrations
Mg2+
-
requirement
Mg2+
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required for maximum activity
Mg2+
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MgCl2, required for activity, best activator
Mg2+
requirement for a divalent cation, Mg2+ is most effective in catalyzing the dephosphorylation of pyridoxal 5-phosphate
Mg2+
-
similar activation as by Co2+ and Ni2+, kinetics, probably the physiological activator
Mn2+
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enzyme has 2% as much activity with 1 mM Mn2+ than with MgCl2
Mn2+
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less activatory than Mg2+, Co2+ or Ni2+, inhibits above 0.05 mM, kinetics
additional information
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essential requirement for divalent cations
additional information
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not activated by 100 mM NaCl, KCl, NaBr, NaI, NaNO3 or sodium acetate
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2,2'-dithiodipyridine
-
0.005 mM, 50% inhibition
2-ethyl-5-phenylisoxazolium-3'-sulfonate
4,4'-dithiodipyridine
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0.005 mM, 50% inhibition
4-pyridoxic acid 5'-phosphate
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very effective inhibitor, 0.02 mM, 50% inhibition of pyridoxine 5-phosphate hydrolysis
5,5'-dithiobis(2-nitrobenzoate)
5,5'-dithiobis(2-nitrobenzoic acid)
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50 nM, 50% inhibition, incorporation of 1 mol per mol of subunit leads to complete inactivation, phosphate or dithiothreitol protects
Ca2+
-
competitive inhibition versus Mg2+, noncompetitive versus substrate
disulfide reagent
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reactivation by excess dithiothreitol, inactivation is due to formation of a mixed disulfide between the reagent and a free cysteinyl residue at or near the active site of enzyme
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EDTA
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0.2 mM, complete inhibition in the absence of Mg2+, 50% inhibition in the presence of 1 mM Mg2+
fluoride
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2 mM, 50% inhibition
Mn2+
-
inhibits above 0.05 mM, activates below 0.05 mM
N-(5'-phospho-4'-pyridoxyl)ethanolamine
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0.05 mM, 12% inhibition
N-(5'-phospho-4'-pyridoxyl)glycine
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0.05 mM, 32% inhibition
N-(5'-phospho-4'-pyridoxyl)phenylalanine
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0.05 mM, 51% inhibition
p-nitrophenyl phosphate
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poor, 4 mM, 50% inhibition of pyridoxine 5-phosphate hydrolysis
Phenyl phosphate
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very poor inhibitor of pyridoxine 5-phosphate hydrolysis
pyridoxal
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weak, 11 mM, 50% inhibition of hydrolysis of pyridoxal 5-phosphate or pyridoxine 5-phosphate
pyridoxal 5'-phosphate
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very effective inhibitor, 0.03 mM, 50% inhibition of pyridoxine 5-phosphate hydrolysis
pyridoxamine 5'-phosphate
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0.5 mM, 50% inhibition of pyridoxine 5-phosphate hydrolysis, less effective than pyridoxal 5-phosphate or 4-pyridoxic acid 5-phosphate
pyridoxine 5'-phosphate
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0.05 mM, 45% inhibition
Tetranitromethane
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inactivates in a time-dependent manner, 10 mM, 70% inhibition in the absence of pyridoxal 5-phosphate and 30% in the presence of 0.15 mM pyridoxal 5-phosphate
thiol-specific reagent
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a variety of thiol-specific reagents inactivate in a time- and concentration-dependent manner, pyridoxal phosphate or phosphate protects
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2-ethyl-5-phenylisoxazolium-3'-sulfonate
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0.25 mM, 5 min at 22°C, 60% loss of activity, inactivates in a concentration- and time-dependent manner, which follows pseudo-first-order kinetics, pyridoxal 5-phosphate, pyridoxine 5-phosphate or phosphate protects
2-ethyl-5-phenylisoxazolium-3'-sulfonate
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inhibition is potentiated by MgCl2
5,5'-dithiobis(2-nitrobenzoate)
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inhibition is potentiated by MgCl2
5,5'-dithiobis(2-nitrobenzoate)
-
-
diethyldicarbonate
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inhibition is not potentiated by MgCl2
diethyldicarbonate
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inactivates by reacting with a group with a pKalpha of 6.7, kinetics, pyridoxine 5-phosphate protects, 100 mM neutral hydroxylamine partially reactivates
iodoacetate
-
inhibition is potentiated by MgCl2
iodoacetate
-
enzyme is very sensitive to
iodoacetate
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0.075 mM, 50% inhibition, incorporation of 0.6 mol per mol of subunit leads to complete inactivation, phosphate protects, inhibition kinetics
molybdate
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competitive inhibition versus substrate, noncompetitive versus Mg2+
molybdate
-
very effective inhibitor, 0.0029 mM, 50% inhibition
N-ethylmaleimide
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inactivated by low concentrations, low concentrations of a substrate, pyridoxine phosphate, or phosphate protect from inactivation, inhibition is not potentiated by MgCl2
N-ethylmaleimide
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enzyme is very sensitive to
N-ethylmaleimide
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0.1 mM, 50% inhibition, incorporation of 0.6 mol per mol of subunit leads to complete inactivation, inhibition kinetics, phosphate protects
p-chloromercuribenzoate
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enzyme is very sensitive to
p-chloromercuribenzoate
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250 nM, 50% inhibition
Phenylglyoxal
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inhibition is not potentiated by MgCl2
Phenylglyoxal
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the incorporation of 1 mol per subunit inactivates, pyridoxal 5-phosphate protects, kinetics
phosphate
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competitive inhibitor
phosphate
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competitive inhibition versus substrate, noncompetitive versus Mg2+
phosphate
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competitive inhibitor with respect to pyridoxine 5-phosphate, product inhibition
phosphate
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competitive inhibitor
Zn2+
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inhibits at higher concentrations, activates somewhat at low concentrations
Zn2+
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very potent inhibitor, 50% inhibition in the presence of MgCl2 by 0.01 mM ZnCl2
additional information
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not inhibited by nucleotide phosphates, phosphoamino acids, levamisole, L-phenylalanine, L(+)-tartrate, 5 mM ATP, 5 mM phosphoglycolate, 0.5 mM alpha- or beta-glycerophosphate, 0.5 mM 3-phosphoglycerate, 0.5 mM 2,3-bisphosphoglycerate, 5 mM pyridoxine, 5 mM pyridoxamine, 5 mM 4-pyridoxic acid, 5 mM 4-pyridine-carboxaldehyde, 5 mM isonicotinate, 5 mM 3-hydroxypyridine, 5 mM salicylaldehyde, 5 mM benzaldehyde
-
additional information
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not inhibited by iodoacetamide or cystamine
-
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Autoimmune Diseases
Pyridoxal phosphatase is a novel cancer autoantigen in the central nervous system.
Carcinoma, Hepatocellular
Azo dye-induced alterations in vitamin B-6 metabolism and in pyridoxal 5'-phosphate-binding proteins in rat liver.
Epilepsy
PLPP/CIN-mediated Mdm2 dephosphorylation increases seizure susceptibility via abrogating PSD95 ubiquitination.
Epilepsy
PLPP/CIN-mediated NEDD4-2 S448 dephosphorylation regulates neuronal excitability via GluA1 ubiquitination.
Lung Neoplasms
Pyridoxal phosphatase is a novel cancer autoantigen in the central nervous system.
Neoplasms
Chronophin is a glial tumor modifier involved in the regulation of glioblastoma growth and invasiveness.
Neoplasms
Pyridoxal phosphatase is a novel cancer autoantigen in the central nervous system.
Neoplasms
Vitamin B6 metabolism in Morris hepatomas.
Nervous System Diseases
Pyridoxal phosphatase is a novel cancer autoantigen in the central nervous system.
Seizures
PLPP/CIN Regulates Seizure Activity by the Differential Modulation of Calsenilin Binding to GluN1 and Kv4.2 in Mice.
Seizures
PLPP/CIN-mediated Mdm2 dephosphorylation increases seizure susceptibility via abrogating PSD95 ubiquitination.
Status Epilepticus
Potential role of pyridoxal-5'-phosphate phosphatase/chronopin in epilepsy.
Status Epilepticus
Pyridoxal-5'-phosphate phosphatase/chronophin induces astroglial apoptosis via actin-depolymerizing factor/cofilin system in the rat brain following status epilepticus.
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0.00112 - 0.00255
4-pyridoxic acid 5'-phosphate
0.0635
N-(5'-phospho-4'-pyridoxyl)benzylamine
-
pH 7.4, 37°C
0.0786
N-(5'-phospho-4'-pyridoxyl)ethanolamine
-
pH 7.4, 37°C
0.0143
N-(5'-phospho-4'-pyridoxyl)glycine
-
pH 7.4, 37°C
0.00824
N-(5'-phospho-4'-pyridoxyl)phenylalanine
-
pH 7.4, 37°C
0.00129 - 0.0025
pyridoxal 5'-phosphate
0.034 - 0.0806
pyridoxamine 5'-phosphate
0.0043 - 0.0434
pyridoxine 5'-phosphate
additional information
additional information
-
0.00112
4-pyridoxic acid 5'-phosphate
-
pH 7.4, 37°C
0.00255
4-pyridoxic acid 5'-phosphate
-
pH 7.4, 37°C
0.00129
pyridoxal 5'-phosphate
-
pH 7.4, 37°C
0.00147
pyridoxal 5'-phosphate
-
pH 7.4, 37°C
0.00154
pyridoxal 5'-phosphate
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pH 7.4, 37°C, 0.188 mM Mg2+
0.00166
pyridoxal 5'-phosphate
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pH 7.4, 37°C, 0.06 mM Co2+
0.0025
pyridoxal 5'-phosphate
pH 7.4, 37°C, recombinant enzyme
0.034
pyridoxamine 5'-phosphate
-
pH 7.4, 37°C
0.0547
pyridoxamine 5'-phosphate
-
pH 7.4, 37°C
0.0806
pyridoxamine 5'-phosphate
pH 7.4, 37°C, recombinant enzyme
0.0043
pyridoxine 5'-phosphate
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pH 7.4, 37°C, 0.39 mM Mg2+
0.00519
pyridoxine 5'-phosphate
-
pH 7.4, 37°C
0.00812
pyridoxine 5'-phosphate
-
pH 7.4, 37°C, 0.13 mM Co2+
0.0106
pyridoxine 5'-phosphate
-
pH 7.4, 37°C
0.0434
pyridoxine 5'-phosphate
pH 7.4, 37°C, recombinant enzyme
additional information
additional information
-
kinetic data, effect of pH on Km for 4-pyridoxic acid 5-phosphate, pyridoxal 5-phosphate, pyridoxine 5-phosphate and pyridoxamine 5-phosphate
-
additional information
additional information
-
kinetic mechanism, kinetic properties
-
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1.52
pyridoxal 5'-phosphate
pH 7.4, 37°C, recombinant enzyme
0.45
pyridoxamine 5'-phosphate
pH 7.4, 37°C, recombinant enzyme
1.25
pyridoxine 5'-phosphate
pH 7.4, 37°C, recombinant enzyme
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additional information
additional information
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-
-
0.22
phosphate
-
-
0.8
phosphate
-
pH 7.4, 37°C
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1.4
-
pH 7.4, 37°C
1.4
pH 7.4, 37°C, hydrolysis of pyridoxal 5-phosphate, recombinant enzyme
additional information
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-
additional information
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-
additional information
crude extract contains 0.13 units/mg, purified PEP-1-PLPP fusion protein contains 1.5 units/mg, after purification of recombinant enzyme, pH 7.4 in 40 mM triethanolamineamine-HCl, measuring absorbance reduction at 390 nm (3 min)
additional information
-
crude extract contains 0.13 units/mg, purified PEP-1-PLPP fusion protein contains 1.5 units/mg, after purification of recombinant enzyme, pH 7.4 in 40 mM triethanolamineamine-HCl, measuring absorbance reduction at 390 nm (3 min)
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additional information
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alkaline and acid pyridoxal phosphate phosphatase, not identical with alkaline and acid phosphatase
7.4
-
assay at
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22
-
assay at, inhibition studies
37
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assay at
37
-
assay at, kinetic analysis
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brenda
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SwissProt
brenda
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brenda
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SwissProt
brenda
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brenda
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SwissProt
brenda
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-
brenda
high expression
brenda
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-
brenda
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brenda
high expression
brenda
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polymorphonuclear
brenda
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-
brenda
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-
brenda
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brenda
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brenda
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brenda
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brenda
highly abundant in, most highly represented in all the regions of central nerve system except the spinal cord
brenda
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-
brenda
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outdated packed erythrocytes
brenda
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-
brenda
high expression
brenda
major expression site additional to brain and testis
brenda
high expression
brenda
major expression site additional to brain and liver
brenda
additional information
mRNA is differentially expressed in a tissue-specific manner, tissue distribution
brenda
additional information
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mRNA is differentially expressed in a tissue-specific manner, tissue distribution
brenda
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-
-
-
brenda
additional information
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subcellular localization in polymorphonuclear leukocytes
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brenda
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physiological function
PDXP transgenic mice have immature spines with small heads, while PDXP knockout mice have gigantic spines. PDXP transgenic mice exhibit enhanced synaptic plasticity, while knockout mice show abnormal synaptic plasticity. PDXP also enhances N-methyl-D-aspartate receptor (GluN) functionality by regulating the coupling of GluN2A with interacting proteins, particularly postsynaptic density-95
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PHOP2_HUMAN
241
0
27769
Swiss-Prot
other Location (Reliability: 3 )
PLPP_HUMAN
296
0
31698
Swiss-Prot
other Location (Reliability: 4 )
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25000
SDS-PAGE, Western blot (rabbit anti-histidine polyclonal antibody)
31698
2 * 31698, sequence calculation, 2 * 32000, recombinant enzyme, SDS-PAGE
60000
gel filtration, recombinant enzyme
32000
SDS-PAGE
32000
2 * 31698, sequence calculation, 2 * 32000, recombinant enzyme, SDS-PAGE
33000
-
SDS-PAGE
33000
-
2 * 33000, SDS-PAGE
64000
-
-
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dimer
-
-
dimer
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2 * 33000, SDS-PAGE
dimer
2 * 31698, sequence calculation, 2 * 32000, recombinant enzyme, SDS-PAGE
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5 - 9
-
60 min, no loss of activity
655966
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purified enzyme is unstable at low protein concentration, 0.002% Triton X-100 stabilizes, enzyme is unstable to freezing in the absence of glycerol
-
recombinant PEP-1-PLPP fusion protein transduced into PC12 cells is stable for 36 h
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Ethanol
-
10%, no effect on enzyme activity
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4°C, storage at concentrations of 0.3 mg/ml or greater, 30 mM phosphate, at least 6 months, stable
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9.6fold, recombinant enzyme
Ni-affinity chromatography
sonication of cells in binding buffer (5 mM imidazole, 0.5 M NaCl, 20 mM Tris-HCl, pH 7.9), centrifugation, Ni2+-nitrilotriacetic acid Sepharose affinity column, salt removed with PD10 column
Ni-affinity chromatography
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Ni-affinity chromatography
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cDNA, from brain, expression in Escherichia coli M15/pRER4, sequencing, ORF is located on chromosome 22q12.3, genomic organization
cloned into plasmid pET15b, expression in Escherichi coli BL21 (DE3) as His-tag fusion protein
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His-tag fusion, expression in Escherichia coli
into pET15b vector and expressed in Escherichia coli BL21(DE3)
PLPP gene fused with a PEP-1 peptide (PEP-1-PLPP) and 6His-tag and cloned into pET-15b. Expression in Escherichia coli BL21 (DE3) transduced into PC12 cells at various times and concentrations to evaluate the transduction ability (analyzed by Western blotting, fluorescence labeled). PLP concentration in cells PC12 cells changed by transduced PEP-1-PLPP fusion protein (spectroscopic measurement)
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lactoferrin activates expression of PDXP, which significantly up-regulates the synthesis of vitamin B6 and the phosphoinositide 3-kinase/serine/threonine-protein kinase/extracellular regulated protein kinases 1/2 pathway
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drug development
transduction of the PEP-1-PLPP fusion protein into cells would be useful as therapeutic agent for various disorders related to this enzyme and vitamin B6
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