Protein
Light-dependent chlorophyll f synthase
Organism
Chlorogloeopsis fritschii (strain PCC 9212)
Function
Synthesizes chlorophyll f or chlorophyllide f (Chl f, 2-formyl chlorophyll a), probably by oxidation of chlorophyll a or chlorophyllide a and reduction of plastoquinone. The reaction is probably light-dependent (PubMed:27386923). Chl f absorbs far red light (FRL, 707 nm in 100% methanol), and is synthesized when cells are grown in FRL, where it provides the advantage of extending the spectral range of harvested light in terrestrial cyanobacteria (PubMed:27386923). When ectopically expressed in Synechococcus PCC 7002 (which does not grow in FRL and does not make Chl f) produces Chl f (0.059% of total chlorophyll) (PubMed:27386923).
Similarity
Belongs to the reaction center PufL/M/PsbA/D family.
Sequence
MKLESDHVIATSDSSDYTSEPTANKLSKRRKKVNYWEKFCSWVTSTENRLYVGWFGVLMIPCVLTAATVFIIAIIAAPPVDMDGIGVPISGSILSGNNIITAAVVPTSAAIGLHFYPIWEAASIDEWLYNGGPYQLIVLHFLIGIIAYQDREWELSYRLGMRPWISLAFTAPVAASVSVLLIYPVGQGSLSAGMPLGISGTFHFMLQFQADHNILMSPLHQLGVIGVLGGAFAAAMHGSLVTSTLIRSHNHSESESINKGYKLGQQHPTYNFRSAQVYLWHLIWQRVSFPNSRKLHFFLAALPVAGIWSAALGVDIAAFDFDYLQFHQPELKSQGQIIHTWADTIDWASLGIKVLDERHIYDFPENLTAGEVVPWK