4.1.1.64: 2,2-dialkylglycine decarboxylase (pyruvate)
This is an abbreviated version!
For detailed information about 2,2-dialkylglycine decarboxylase (pyruvate), go to the full flat file.
Word Map on EC 4.1.1.64
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4.1.1.64
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pyridoxal
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transamination
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aldimine
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half-reaction
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phosphate-dependent
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alkali
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stereoelectronic
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2-aminoisobutyrate
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plp-dependent
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r-factors
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aminotransferases
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cepacia
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phenol-lyase
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1-aminocyclopropane-1-carboxylate
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quinonoid
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decarboxylases
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toney
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pyridoxamine
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alpha-carboxylate
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omega-amino
- 4.1.1.64
- pyridoxal
-
transamination
-
aldimine
-
half-reaction
-
phosphate-dependent
- alkali
-
stereoelectronic
- 2-aminoisobutyrate
-
plp-dependent
-
r-factors
- aminotransferases
- cepacia
-
phenol-lyase
- 1-aminocyclopropane-1-carboxylate
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quinonoid
- decarboxylases
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toney
- pyridoxamine
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alpha-carboxylate
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omega-amino
Reaction
Synonyms
2,2-Dialkyl-2-amino acid-pyruvate aminotransferase, alpha-Dialkyl amino acid transaminase, alpha-Dialkylamino acid aminotransferase, alpha-Dialkylamino acid transaminase, Decarboxylase, dialkyl amino acid (pyruvate), DGD, Dialkylamino-acid decarboxylase (pyruvate), dialkylglycine decarboxylase, L-Alanine-alpha-ketobutyrate aminotransferase
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Reaction
Reaction on EC 4.1.1.64 - 2,2-dialkylglycine decarboxylase (pyruvate)
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mechanism
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2,2-dialkylglycine + pyruvate = dialkyl ketone + CO2 + L-alanine
mechanism
2,2-dialkylglycine + pyruvate = dialkyl ketone + CO2 + L-alanine
cooperativity does not play a role in catalysis or regulation
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2,2-dialkylglycine + pyruvate = dialkyl ketone + CO2 + L-alanine
model in which the interaction between a carboxylate group in the B subsite and Arg406 is a prerequisite to proton donation to and removal from Calpha
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2,2-dialkylglycine + pyruvate = dialkyl ketone + CO2 + L-alanine
pH-studies on the mechanism
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2,2-dialkylglycine + pyruvate = dialkyl ketone + CO2 + L-alanine
the reaction of the slower substrates L-phenylglycine and 1-aminocyclohexane-1-carboxylate may have external aldimine formation as the rate-determining step. The biphasic reactions of 2-methyl-2-aminomalonate, 1-aminocyclopentane-1-carboxylate, isopropylamine and Gly all have external aldimine formation as the rapid observable step
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2,2-dialkylglycine + pyruvate = dialkyl ketone + CO2 + L-alanine
kinetics of inhibition
2,2-dialkylglycine + pyruvate = dialkyl ketone + CO2 + L-alanine
kinetics, a rate-limiting, concerted Calpha-decarboxylation/c4-protonation mechanism for the AIB decarboxylation reaction and rapid equilibrium quinoid formation followed by rate-limiting protonation to the ketimine intermediate for the L-alanine transamination half-reaction
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