Chemistry:Myxoxanthophyll
| |
| Names | |
|---|---|
| IUPAC name
(3S,4R,5S)-2-[(4E,6E,8E,10E,12E,14E,16E,18E,20E,22E,24E)-2-hydroxy-25-(4-hydroxy-2,6,6-trimethylcyclohexen-1-yl)-2,6,10,14,19,23-hexamethylpentacosa-4,6,8,10,12,14,16,18,20,22,24-undecaen-3-yl]oxy-6-methyloxane-3,4,5-triol
| |
| Other names
Myxoxanthophyll, myxol-2' fucoside
| |
| Identifiers | |
3D model (JSmol)
|
|
PubChem CID
|
|
| UNII | |
| |
| |
| Properties | |
| C46H66O7 | |
| Molar mass | 731.012 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Myxoxanthophyll is a carotenoid glycoside pigment present (usually as rhamnosides) in the photosynthetic apparatus of cyanobacteria.[1] It is named after the word "Myxophyceae", a former term for cyanobacteria.[2] As a monocyclic xanthophyll, it has a yellowish color. It is required for normal cell wall structure and thylakoid organization in the cyanobacterium Synechocystis.[3] The pigment is unusual because it is glycosylated on the 2'-OH rather than the 1'-OH position of the molecule.[2] Myxoxanthophyll was first isolated from Oscillatoria rubenscens in 1936.[4]
Synthesis
The bright red pigment lycopene is the acyclic precursor of all carotenoids in cyanobacteria. In myxoxanthophyll synthesis, lycopene is enzymatically converted to 1-hydroxylycoprene, then to intermediates 1'-hydroxy-y-carotene, plectaniaxanthin, and myxol. Finally, the hydroxyl group in myxol is glycosylated at the 2' position to form myxoxanthophyll.[2]
References
- ↑ "myxoxanthophyll: definition of myxoxanthophyll in Oxford dictionary (American English) (US)". Oxford University Press. 2015. http://www.oxforddictionaries.com/us/definition/american_english/myxoxanthophyll.
- ↑ 2.0 2.1 2.2 "The biosynthetic pathway for myxol-2' fucoside (myxoxanthophyll) in the cyanobacterium Synechococcus sp. strain PCC 7002.". J Bacteriol 191 (10): 3292–300. 2009. doi:10.1128/JB.00050-09. PMID 19304845.
- ↑ "Myxoxanthophyll is required for normal cell wall structure and thylakoid organization in the cyanobacterium Synechocystis sp. strain PCC 6803". J. Bacteriol. 187 (20): 6883–92. 2005. doi:10.1128/JB.187.20.6883-6892.2005. PMID 16199557.
- ↑ "Blockade of growth hormone secretagogue receptor 1A signaling by JMV 2959 attenuates the NMDAR antagonist, phencyclidine-induced impairments in prepulse inhibition.". Psychopharmacology 232 (23): 4285–4292. 2015. doi:10.1007/s00213-015-4054-3. PMID 26319159.
External links
 |  |
