Phytochromobilin:ferredoxin oxidoreductase

(3Z)-phytochromobilin + oxidized ferredoxin $rightleftharpoons$ biliverdin IXalpha + reduced ferredoxin

Thus, the two substrates of this enzyme are (3Z)-phytochromobilin and oxidized ferredoxin, whereas its two products are biliverdin IXalpha and reduced ferredoxin.

This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-CH group of donor with an iron-sulfur protein as acceptor. The systematic name of this enzyme class is (3Z)-phytochromobilin:ferredoxin oxidoreductase. Other names in common use include HY2, PPhiB synthase, and phytochromobilin synthase. This enzyme participates in porphyrin and chlorophyll metabolism.

References

• Frankenberg N, Mukougawa K, Kohchi T, Lagarias JC "Functional genomic analysis of the HY2 family of ferredoxin-dependent bilin reductases from oxygenic photosynthetic organisms". Plant. Cell. 13 965–78.
• McDowell MT, Lagarias JC "Purification and biochemical properties of phytochromobilin synthase from etiolated oat seedlings". Plant. Physiol. 126 1546–54.
• Terry MJ, Wahleithner JA, Lagarias JC "Biosynthesis of the plant photoreceptor phytochrome". Arch. Biochem. Biophys. 306 1–15.

External links

The CAS registry number for this enzyme class is .

Gene Ontology (GO) codes