page_title: Phytoene desaturase (lycopene-forming)
hierarchical_section_title: Phytoene desaturase (lycopene-forming)
caption_attribution_description: English: Cartoon representation of the crystal structure of CrtI. Bacterial phytoene dehydrogenase from Pantoea ananatis. Colored from N-terminus in blue to C-terminus in red. PDB: 4DGK&#8203;. Corresponding paper: doi:10.1371/journal.pone.0039550
context_page_description: Phytoene desaturase (lycopene-forming) are enzymes found in archaea, bacteria and fungi that are involved in carotenoid biosynthesis. They catalyze the conversion of colorless 15-cis-phytoene into a bright red lycopene in a biochemical pathway called the poly-trans pathway. The same process in plants and cyanobacteria utilizes four separate enzymes in a poly-cis pathway.
context_section_description: Phytoene desaturase (lycopene-forming) (CrtI, four-step phytoene desaturase)  (EC 1.3.99.31, 15-cis-phytoene:acceptor oxidoreductase (lycopene-forming)) are enzymes found in archaea, bacteria and fungi that are involved in carotenoid biosynthesis. They catalyze the conversion of colorless 15-cis-phytoene into a bright red lycopene in a biochemical pathway called the poly-trans pathway. The same process in plants and cyanobacteria utilizes four separate enzymes in a poly-cis pathway.
caption: Crystallographic structure of a bacterial phytoene desaturase monomer from Pantoea ananatis.[1]
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