Chlide_reductase_Z : Z subunit of chlorophyllide (chlide) reductase (BchZ). Chlide reductase participates in photosynthetic pigment synthesis playing a role in the conversion of chlorophylls(Chl) into bacteriochlorophylls (BChl). Chlide reductase catalyzes the reduction of the B-ring of the tetrapyrolle. Chlide reductase is a three subunit enzyme (subunits are designated BchX, BchY and BchZ). The similarity between these three subunits and the subunits for nitrogenase suggests that BchX serves as an electron donor for the BchY-BchY catalytic subunits.
Jiyao W et al.(2023). "The conserved domain database in 2023.",