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MetaCyc Enzyme: 15-cis-phytoene desaturase

Gene: PDS Accession Number: AT4G14210 (MetaCyc)

Synonyms: AT4G14210

Species: Arabidopsis thaliana col

Subunit composition of 15-cis-phytoene desaturase = [PDS]
         phytoene desaturase subunit = PDS

Summary:
The enzyme phytoene desaturase (PYD) from Arabidopsis thaliana was expressed in Escherichia coli and its function demonstrated [Bartley99].

Unification Links: Entrez-gene:PDS3, TAIR:AT4G14210

Gene-Reaction Schematic

Gene-Reaction Schematic


Enzymatic reaction of: 15,9'-di-cis-phytofluene desaturase (15-cis-phytoene desaturase)

Inferred from experiment

15,9'-di-cis-phytofluene + a plastoquinone → 9,15,9'-tri-cis-ζ-carotene + a plastoquinol

The direction shown, i.e. which substrates are on the left and right sides, is in accordance with the direction in which it was curated.

The reaction is favored in the direction shown.

In Pathways: superpathway of carotenoid biosynthesis, trans-lycopene biosynthesis II (plants)


Enzymatic reaction of: 15-cis-phytoene desaturase

Inferred from experiment

15-cis-phytoene + a plastoquinone → 15,9'-di-cis-phytofluene + a plastoquinol

The direction shown, i.e. which substrates are on the left and right sides, is in accordance with the direction in which it was curated.

The reaction is favored in the direction shown.

In Pathways: superpathway of carotenoid biosynthesis, trans-lycopene biosynthesis II (plants)


Enzymatic reaction of: phytoene desaturase

Inferred from experiment

Synonyms: phytoene dehydrogenase

EC Number: 1.3.5.5

15-cis-phytoene + 2 a plastoquinone ⇄ 9,15,9'-tri-cis-ζ-carotene + 2 a plastoquinol

The direction shown, i.e. which substrates are on the left and right sides, is in accordance with the Enzyme Commission system.

Reversibility of this reaction is unspecified.

In Pathways: superpathway of carotenoid biosynthesis, trans-lycopene biosynthesis II (plants)


References

Bartley99: Bartley GE, Scolnik PA, Beyer P (1999). "Two Arabidopsis thaliana carotene desaturases, phytoene desaturase and zeta-carotene desaturase, expressed in Escherichia coli, catalyze a poly-cis pathway to yield pro-lycopene." Eur J Biochem 1999;259(1-2);396-403. PMID: 9914519


Report Errors or Provide Feedback
Please cite the following article in publications resulting from the use of MetaCyc: Caspi et al, Nucleic Acids Research 42:D459-D471 2014
Page generated by Pathway Tools version 19.5 (software by SRI International) on Fri Apr 29, 2016, biocyc13.