Coniferyl_alcohol

Coniferyl alcohol

Coniferyl alcohol

Chemical compound

Coniferyl alcohol is an organic compound with the formula HO(CH3O)C6H3CH=CHCH2OH. A colourless or white solid, it is one of the monolignols, produced via the phenylpropanoid biochemical pathway. When copolymerized with related aromatic compounds, coniferyl alcohol forms lignin or lignans.[1][2][3] Coniferin is a glucoside of coniferyl alcohol. Coniferyl alcohol is an intermediate in biosynthesis of eugenol and of stilbenoids and coumarin. Gum benzoin contains significant amount of coniferyl alcohol and its esters. It is found in both gymnosperm and angiosperm plants. Sinapyl alcohol and paracoumaryl alcohol, the other two lignin monomers, are found in angiosperm plants and grasses.

Quick Facts Names, Identifiers ...

Occurrence

Coniferyl alcohol is produced from coniferyl aldehyde by the action of dehydrogenase enzymes.[3]

It is a queen retinue pheromone (QRP), a type of honey bee pheromone found in the mandibular glands.[4]

In Forsythia intermedia a dirigent protein was found to direct the stereoselective biosynthesis of (+)-pinoresinol from coniferyl alcohol.[5] Recently, a second, enantiocomplementary dirigent protein was identified in Arabidopsis thaliana, which directs enantioselective synthesis of (−)-pinoresinol.[6]

References

  1. [1]
    Iiyama, Kenji; Lam, Thi Bach-Tuyet; Stone, Bruce A. (1994). "Covalent Cross-Links in the Cell Wall". Plant Physiology. 104 (2): 315–320. doi:10.1104/pp.104.2.315. PMC 159201. PMID 12232082.
  2. [2]
    Wout Boerjan, John Ralph, Marie Baucher "Lignin Biosynthesis" Annu. Rev. Plant Biol. 2003, vol. 54, pp. 519–46. doi:10.1146/annurev.arplant.54.031902.134938
  3. [3]
    Li, Laigeng; Cheng, Xiao Fei; Leshkevich, Jacqueline; Umezawa, Toshiaki; Harding, Scott A.; Chiang, Vincent L. (2001). "The Last Step of Syringyl Monolignol Biosynthesis in Angiosperms is Regulated by a Novel Gene Encoding Sinapyl Alcohol Dehydrogenase". The Plant Cell. 13 (7): 1567–1586. doi:10.1105/tpc.010111. PMC 139549. PMID 11449052.
  4. [4]
    Keeling, C. I.; Slessor, K. N.; Higo, H. A.; Winston, M. L. (2003). "Isolation and identification of new components of the honey bee (Apis mellifera L.) queen retinue pheromone". Proc. Natl. Acad. Sci. U.S.A. 100 (8): 4486–4491. Bibcode:2003PNAS..100.4486K. doi:10.1073/pnas.0836984100. PMC 153582. PMID 12676987.
  5. [5]
    Davin, L. B.; Wang, H. B.; Crowell, A. L.; et al. (1997). "Stereoselective bimolecular phenoxy radical coupling by an auxiliary (dirigent) protein without an active center". Science. 275 (5298): 362–366. doi:10.1126/science.275.5298.362. PMID 8994027. S2CID 41957412.
  6. [6]
    Pickel, B.; Constantin, M.-A.; Pfannsteil, J.; Conrad, J.; Beifuss, U.; Schaffer, A. (March 2007). "An Enantiocomplementary Dirigent Protein for the Enantioselective Laccase-Catalyzed Oxidative Coupling of Phenols". Angewandte Chemie. 53 (4): 273–284. doi:10.1007/s10086-007-0892-x. S2CID 195313754.
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