This view shows enzymes only for those organisms listed below, in the list of taxa known to possess the pathway. If an enzyme name is shown in bold, there is experimental evidence for this enzymatic activity.
|Superclasses:||Biosynthesis → Cofactors, Prosthetic Groups, Electron Carriers Biosynthesis → Porphyrin Compounds Biosynthesis → Chlorophyll Biosynthesis → Chlorophyll a Biosynthesis|
Some taxa known to possess this pathway include : Arabidopsis thaliana col
Expected Taxonomic Range: Viridiplantae
Chlorophyll is a green photosynthetic pigment found in photosynthetic plants, algae, and bacteria. Its name is derived from ancient Greek: chloros = green and phyllon = leaf. Chlorophyll functions as the main light harvesting pigment in photosynthesis, capturing photons and transfering them to the reaction centers. Chlorophyll absorbs mostly in the blue and, to a lesser extent, red portions of the electromagnetic spectrum, hence its intense green color. There are several variants of chlorophyll ( chlorophyll a, chlorophyll a', chlorophyll b, chlorophyll b', chlorophyll c1, chlorophyll c2, chlorophyll d, chlorophyll d', chlorophyll f and chlorophyll f').
About This Pathway
It has been shown that the enzyme that is responsible for the esterification, EC 18.104.22.168, chlorophyll synthase, can attach either a phytol chain (see chlorophyll a biosynthesis I) or a geranylgeriol side chain (in both cases a diphosphate form is used by the enzyme). In the latter case, the geranylgeraniol side chain is reduced after the esterification by EC 22.214.171.124, geranylgeranyl diphosphate reductase, producing a phytyl side chain in three steps [Keller98].
Unification Links: AraCyc:PWY-5064
Keller98: Keller Y, Bouvier F, d'Harlingue A, Camara B (1998). "Metabolic compartmentation of plastid prenyllipid biosynthesis--evidence for the involvement of a multifunctional geranylgeranyl reductase." Eur J Biochem 251(1-2);413-7. PMID: 9492312
Nagata05: Nagata N, Tanaka R, Satoh S, Tanaka A (2005). "Identification of a vinyl reductase gene for chlorophyll synthesis in Arabidopsis thaliana and implications for the evolution of Prochlorococcus species." Plant Cell 17(1);233-40. PMID: 15632054
Nakanishi05: Nakanishi H, Nozue H, Suzuki K, Kaneko Y, Taguchi G, Hayashida N (2005). "Characterization of the Arabidopsis thaliana mutant pcb2 which accumulates divinyl chlorophylls." Plant Cell Physiol 46(3);467-73. PMID: 15695432
Tsukatani13: Tsukatani Y, Yamamoto H, Harada J, Yoshitomi T, Nomata J, Kasahara M, Mizoguchi T, Fujita Y, Tamiaki H (2013). "An unexpectedly branched biosynthetic pathway for bacteriochlorophyll b capable of absorbing near-infrared light." Sci Rep 3;1217. PMID: 23386973
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