1.14.20.3: (5R)-carbapenem-3-carboxylate synthase
This is an abbreviated version!
For detailed information about (5R)-carbapenem-3-carboxylate synthase, go to the full flat file.
Reaction
Synonyms
carbapenem synthase, CarC
ECTree
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Reaction
Reaction on EC 1.14.20.3 - (5R)-carbapenem-3-carboxylate synthase
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(3S,5S)-carbapenam-3-carboxylate + 2-oxoglutarate + O2 = (5R)-carbapen-2-em-3-carboxylate + succinate + CO2 + H2O
(3S,5S)-carbapenam-3-carboxylate + 2-oxoglutarate + O2 = (5R)-carbapen-2-em-3-carboxylate + succinate + CO2 + H2O
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(3S,5S)-carbapenam-3-carboxylate + 2-oxoglutarate + O2 = (5R)-carbapen-2-em-3-carboxylate + succinate + CO2 + H2O
mechanism
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(3S,5S)-carbapenam-3-carboxylate + 2-oxoglutarate + O2 = (5R)-carbapen-2-em-3-carboxylate + succinate + CO2 + H2O
a mechanism for CarC-catalyzed coupled epimerization and desaturation reactions is proposed
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(3S,5S)-carbapenam-3-carboxylate + 2-oxoglutarate + O2 = (5R)-carbapen-2-em-3-carboxylate + succinate + CO2 + H2O
the contrathermodynamic epimerization of (3S,5S)-carbapenam-3-carboxylate to (3S,5R)-carbapenam-3-carboxylate is coupled at least to the binding of 2-oxoglutarate and it is probably coupled to the reduction of molecular oxygen and proceeds by way of radical abstraction at C-5. The presumed Fe(IV)=O species formed in these processes is required to drive the subsequent desaturation process
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