''gamma''-Carotene

γ-Carotene
Skeletal formula of γ-carotene
Space-filling model of the γ-carotene molecule
Names
IUPAC name
β,ψ-Carotene
Systematic IUPAC name
2-((1E,3E,5E,7E,9E,11E,13E,15E,17E,19E)-3,7,12,16,20,24-hexamethylpentacosa-1,3,5,7,9,11,13,15,17,19,23-undecaen-1-yl)-1,3,3-trimethylcyclohex-1-ene
Other names
β,psi-Carotene
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
Properties
C40H56
Molar mass 536.89 g·mol−1
Melting point 160 to 162 °C (320 to 324 °F; 433 to 435 K)[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

γ-Carotene is a carotenoid, and is a biosynthetic intermediate for cyclized carotenoid synthesis in plants. It is formed from cyclization of lycopene by lycopene cyclase epsilon.[2] Along with several other carotenoids, γ-Carotene is a vitamer of vitamin A in herbivores and omnivores. Carotenoids with a cyclized, beta-ionone ring can be converted to vitamin A, also known as retinol, by the enzyme Beta-carotene 15,15'-dioxygenase; however, the bioconversion of gamma-carotene to retinol has not been well-characterized.

References

  1. ↑ Ruegg, R.; Schwieter, U.; Ryser, G.; Schudel, P.; Isler, O. (1961). "Synthesen in der Carotinoid-Reihe. 17. Mittelung. γ-Carotin sowie d,l-α- und β-Carotin aus Dehydro-β-apo-12′-carotinal(C25)". Helvetica Chimica Acta. 44 (4): 985–93. doi:10.1002/hlca.19610440414.
  2. ↑ Rodriguez-Concepcion M, Stange C. Biosynthesis of carotenoids in carrot: an underground story comes to light. Archives of biochemistry and biophysics. 2013;539:110-6.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.