2.5.1.54: 3-deoxy-7-phosphoheptulonate synthase This is an abbreviated version! For detailed information about 3-deoxy-7-phosphoheptulonate synthase, go to the full flat file .
Reaction
phosphoenolpyruvate +
D-erythrose 4-phosphate +
H2O =
3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate +
phosphate
Synonyms 2-dehydro-3-deoxy-D-arabino-heptonate-7-phosphate D-erythrose-4-phosphate-lyase (pyruvate-phosphorylating), 2-dehydro-3-deoxy-phosphoheptanoate aldolase, 2-dehydro-3-deoxy-phosphoheptonate aldolase, 2-keto-3-deoxy-D-arabino-heptonic acid 7-phosphate synthetase, 3-deoxy-7-phosphoheptulonate synthase, 3-deoxy-D-arabino heptulosonate 7-phosphate synthase, 3-deoxy-D-arabino-2-heptulosonic acid 7-phosphate synthetase, 3-deoxy-D-arabino-heptolosonate-7-phosphate synthetase, 3-deoxy-D-arabino-heptulosonate 7-phosphate synthase, 3-deoxy-D-arabino-heptulosonate 7-phosphate synthetase, 3-deoxy-D-arabino-heptulosonate-7-phosphate synthase, 3-deoxy-D-arabino-heptulosonic acid 7-phosphate synthase, 3-deoxy-D-arabinoheptulosonate 7-phosphate synthase, 3-deoxy-D-arabinoheptulosonate-7-phosphate synthetase, 7-phospho-2-dehydro-3-deoxy-D-arabino-heptonate D-erythrose-4-phosphate-lyase (pyruvate-phosphorylating), 7-phospho-2-keto-3-deoxy-D-arabino-heptonate D-erythrose-4-phosphate lyase (pyruvate-phosphorylating), aldolase, phospho-2-keto-3-deoxyheptanoate, Aro1A, Aro4, Aro4p, AroA, AroA(Q), aroF, AroFFR, AroG, D-erythrose-4-phosphate-lyase, D-erythrose-4-phosphate-lyase (pyruvate-phosphorylating), DAH7-P synthase, DAH7-P synthase (phe), DAH7P, DAH7P synthase, DAH7PS, DAHP synthase, DAHP synthase-phe, DAHP synthase-trp, DAHP synthase-tyr, DAHP(Phe), DAHPS, DAHPS(Tyr), Dax1, deoxy-D-arabino-heptulosonate-7-phosphate synthetase, DHS, DHS1, DS-Co, DS-Mn, EC 4.1.2.15, KDPH synthase, KDPH synthetase, More, mtDAH7Ps, MtDS, NCgl0950 DAHP synthase, NCgl2098 DAHP synthase, Nme-DAH7PS, OsDAHPS, PF1690, phospho-2-dehydro-3-deoxyheptonate aldolase, phospho-2-keto-3-deoxyheptanoate aldolase, Phospho-2-keto-3-deoxyheptonate aldolase, phospho-2-keto-3-deoxyheptonic aldolase, phospho-2-oxo-3-deoxyheptonate aldolase, phzC, TmaDAH7PS
ECTree
Reaction
Reaction on EC 2.5.1.54 - 3-deoxy-7-phosphoheptulonate synthase
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
mechanism
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
mechanism
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
sequential mechanism
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
sequential mechanism
-
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
sequential mechanism
-
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
sequential mechanism
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
ordered sequential mechanism
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
His268 is located in the active site
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
ordered ping-pong bi-bi mechanism
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
ordered ping-pong bi-bi mechanism
-
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
ordered ping-pong bi-bi mechanism
-
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
ordered ping-pong bi-bi mechanism
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
first substrate is phosphoenolpyruvate
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
first substrate is phosphoenolpyruvate
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
first substrate is phosphoenolpyruvate
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
Cys67 and Cys145 are important for the catalytic reaction
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
rapid equilibrium ordered mechanism, in which phosphoenolpyruvate is the first substrate to bind and 3-deoxy-D-arabinoheptulosonate 7-phosphate is the second product to be released
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
Lys186 is involved in hydrogen bonding with phosphoenolpyruvate
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
active site cysteines: Cys61 and Cys328
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
product release is rate-limiting, rate constant for product formation is higher with Mn2+ than with Zn2+ or Cu2+. Role of metal ion is to position the amino acids with the appropriate geometry required to coordinate and activate the water molecule
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
simultaneous presence of a metal ion and phosphoenolpyruvate result in an ordering of the protein into a conformation that is prepared for binding the second substrate erythrose 4-phosphate. Initial step of reaction is a nucleophilic attack of the double bond of phosphoenolpyruvate on the metal-activated carbonyl group of erythrose 4-phosphate
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
proposed mechanism of catalysis of NmeDAH7PS showing key nucleophilic role for active site WAT1, overview
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
ordered ping-pong bi-bi mechanism
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
first substrate is phosphoenolpyruvate
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-
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
ordered ping-pong bi-bi mechanism
-
-
phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
first substrate is phosphoenolpyruvate
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phosphoenolpyruvate + D-erythrose 4-phosphate + H2O = 3-deoxy-D-arabino-hept-2-ulosonate 7-phosphate + phosphate
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