+ 2 reduced ferredoxin
+ ATP + 2 H+
Chlorophyllide a reductase
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| Chlorophyllide a reductase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC no. | 1.3.7.15 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| |||||||||
Chlorophyllide a reductase (EC 1.3.7.15), also known as COR, is an enzyme with systematic name bacteriochlorophyllide-a:ferredoxin 7,8-oxidoreductase.[1][2] It catalyses the following chemical reaction
This reduction, (with trans stereochemistry) of the sidechains in the pyrrole ring, gives the characteristic 18-electron aromatic system that distinguishes bacteriochlorophylls from chlorophylls, which retain the chlorin system of chlorophyllide a.[3] The enzyme uses ferredoxin and adenosine triphosphate as cofactors and gives adenosine diphosphate and phosphate (Pi) as byproducts.[4]
This enzyme is present in purple bacteria such as Rhodobacter capsulatus and Rhodobacter sphaeroides, and Pseudomonadota. It is a component of the biosynthetic pathway to bacteriochlorophylls.[5][6][7]
