4.3.3.7: 4-hydroxy-tetrahydrodipicolinate synthase
This is an abbreviated version!
For detailed information about 4-hydroxy-tetrahydrodipicolinate synthase, go to the full flat file.
Word Map on EC 4.3.3.7
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4.3.3.7
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diaminopimelate
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4.2.1.52
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s-lysine
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drug development
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homoserine
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meso-diaminopimelate
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aspartokinase
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l-threonine
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s-aspartate
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s-2-aminoethyl-l-cysteine
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feedback-insensitive
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lysine-insensitive
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beta-semialdehyde
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pharmacology
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l-aspartate-beta-semialdehyde
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2.7.2.4
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aspartate-derived
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medicine
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synthesis
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agriculture
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biotechnology
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industry
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food industry
- 4.3.3.7
- diaminopimelate
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4.2.1.52
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s-lysine
- drug development
- homoserine
- meso-diaminopimelate
- aspartokinase
- l-threonine
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s-aspartate
- s-2-aminoethyl-l-cysteine
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feedback-insensitive
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lysine-insensitive
- beta-semialdehyde
- pharmacology
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l-aspartate-beta-semialdehyde
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2.7.2.4
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aspartate-derived
- medicine
- synthesis
- agriculture
- biotechnology
- industry
- food industry
Reaction
Synonyms
Aq_1143, AT2G45440, BA3935 gene product, cDHDPS, CjDHDPS, DapA, DapA2, DHDPA synthase, DHDPS, DHDPS2, dihydro-dipicolinic acid synthase, dihydrodipicolinate synthase, dihydrodipicolinic acid synthase, dihydrodipocolinate synthase, dihydropicolinate synthetase, EC 4.2.1.52, FaDHDPS, HTPA synthase, More, MosA, MosA protein, MRSA-DHDPS, PA1010, pyruvate-aspartic semialdehyde condensing enzyme, Rv2753c, synthase, dihydrodipicolinate, VEG81, Vegetative protein 81
ECTree
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Reaction
Reaction on EC 4.3.3.7 - 4-hydroxy-tetrahydrodipicolinate synthase
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pyruvate + L-aspartate-4-semialdehyde = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H2O
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pyruvate + L-aspartate-4-semialdehyde = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H2O
pyruvate binds to the enzyme first by forming a Schiff base with the epsilon-amino group of Lys161. After release of the first water molecule L-aspartate-4-semialdehyde binds to the active site and the condensation reaction to form 2,3-dihydrodipicolinate takes place
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pyruvate + L-aspartate-4-semialdehyde = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H2O
the reaction is initiated by an nucleophilic attack of the epsilon-amino group of active site lysine to the C2 atom of pyruvate with subsequent imine formation. Tautomerization of the imine to the enamine creates the nucleophile necessary for the attack of the aldehyde group of L-aspartate semialdehyde. Cyclization of the substrate coupled with transamination leads to stepwise detachment from the active site
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pyruvate + L-aspartate-4-semialdehyde = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H2O
ping-pong mechanism, pyruvate binds as a Schiff base to Lys161. After aldol reaction with L-aspartate-4-semialdehyde and transamination the product is released
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pyruvate + L-aspartate-4-semialdehyde = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H2O
ping-pong kinetic and catalytic mechanism involves a catalytic triad which consists of Tyr133, Thr44, and Tyr107, overview
pyruvate + L-aspartate-4-semialdehyde = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H2O
reaction mechanism including Schiff base formation, tautomerization, and cyclization, overview
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pyruvate + L-aspartate-4-semialdehyde = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H2O
ping-pong kinetic reaction mechanism
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pyruvate + L-aspartate-4-semialdehyde = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H2O
ping-pong mechanism, in which pyruvate binds as a Schiff base to an active-site lysine residue (Lys162 in Agrobacterium tumefaciens)
pyruvate + L-aspartate-4-semialdehyde = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H2O
reaction steps, overview
pyruvate + L-aspartate-4-semialdehyde = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H2O
the enzyme-catalyzed reaction is initiated by condensation of pyruvate with an active site lysine residue (Lys161 in Escherichia coli DHDPS) forming a Schiff base, ping-pong kinetic reaction mechanism via enamine intermediate, overview
pyruvate + L-aspartate-4-semialdehyde = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H2O
the reaction proceeds via a ping-pong kinetic mechanism in which pyruvate binds and forms a Schiff base to an active-site lysine residue (Lys184 in Vitis vinifera enzyme). L-aspartate-4-semialdehyde then reacts with the resultant enamine and following cyclization forms the product (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate
pyruvate + L-aspartate-4-semialdehyde = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H2O
ping-pong mechanism, in which pyruvate binds as a Schiff base to an active-site lysine residue (Lys162 in Agrobacterium tumefaciens)
Agrobacterium tumefaciens C58 / ATCC 33970
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