1.14.16.1: phenylalanine 4-monooxygenase
This is an abbreviated version!
For detailed information about phenylalanine 4-monooxygenase, go to the full flat file.
Word Map on EC 1.14.16.1
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1.14.16.1
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phenylketonuria
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hyperphenylalaninemia
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bh4
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error
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pterins
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inborn
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children
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hydroxylases
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neurotransmitter
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province
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tetrahydropterins
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counsel
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intellectual
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dopamine
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l-tyrosine
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genotype-phenotype
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prenatal
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serotonin
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dihydropteridine
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caucasian
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catecholamine
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hepatocytes
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sepiapterin
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genotype-based
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quinonoid
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non-heme
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chromobacterium
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neopterin
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ligation-dependent
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dihydrochloride
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neuropsychological
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lysolecithin
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lifelong
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phenylpyruvate
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dopa
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cyclohydrolase
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molecular biology
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rflps
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p-chlorophenylalanine
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dihydrobiopterin
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hypopigmentation
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s-oxidation
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pteridine
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violaceum
- 1.14.16.1
- phenylketonuria
- hyperphenylalaninemia
- bh4
- error
- pterins
-
inborn
- children
- hydroxylases
-
neurotransmitter
-
province
- tetrahydropterins
-
counsel
-
intellectual
- dopamine
- l-tyrosine
-
genotype-phenotype
-
prenatal
- serotonin
- dihydropteridine
-
caucasian
- catecholamine
- hepatocytes
- sepiapterin
-
genotype-based
-
quinonoid
-
non-heme
-
chromobacterium
- neopterin
-
ligation-dependent
- dihydrochloride
-
neuropsychological
- lysolecithin
-
lifelong
- phenylpyruvate
- dopa
-
cyclohydrolase
- molecular biology
-
rflps
- p-chlorophenylalanine
- dihydrobiopterin
-
hypopigmentation
-
s-oxidation
- pteridine
- violaceum
Reaction
Synonyms
cePAH, DicPAH, EC 1.14.3.1, EC 1.99.1.2, HPAH, L-phenylalanine 4-hydroxylase, oxygenase, phenylalanine 4-mono-, P4H, PAH, PheH, phenylalaninase, phenylalanine 4-hydroxylase, phenylalanine hydroxylase, phenylalanine monooxygenase, PheOH, phhA
ECTree
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Temperature Stability
Temperature Stability on EC 1.14.16.1 - phenylalanine 4-monooxygenase
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20 - 60
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holo-phenylalanine hydroxylase displays a large increase in thermal stability (approximately 15°C upshift in the Tm value) compared with the apoenzyme (melting temperature at 64°C), holo-caPAH shows higher kinetic stability at optimal growth temperature (denaturing approximately 8 times more slowly than the apo form at 55°C)
44 - 76
pH 7.4, kinetics of thermal unfolding of apo- and holo-enzymes within the temperature range and with different metal cofactors: native Fe2+, or artificial Zn2+ or Co2+, unfolding profiles, transition-state analysis shows a common mechanism for all enzyme variants, at higher temperatures the unfolding rates of Zn- and Co-PAH are affected significantly by entropy, while the unfolding rates of apo- and Fe-PAH are dominated by enthalpy even at higher temperatures, overview
47
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50% residual activity after 66 min, presence of Fe(II), after 8 min in presence of EDTA
50
additional information
the residual activity of the enzyme is 8.6% and the half-life is 9 min when incubated at 50°C for 1 h
thermal inactivation profiles of the purified wild-type enzyme, and mutants I65T, R261Q and V388M in absence or presence of 1% glycerol or trimethylamine N-oxide, overview
additional information
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thermal inactivation profiles of the purified wild-type enzyme, and mutants I65T, R261Q and V388M in absence or presence of 1% glycerol or trimethylamine N-oxide, overview