Carotenoid

DATA No : VCA1008 INFORMANT : Norihiko Misawa

NAME : 7',8'-Dihydro-b,y-carotene

COMMON NAME	:	b-Zeacarotene
SYMBOL	:
FORMULA	:	C₄₀H₅₈ MOL.WT (average) : 538.889

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BIOLOGICAL ACTIVITY

PHYSICAL AND CHEMICAL PROPERTIES

MELTING POINT	:

BOILING POINT	:

REFRACTIVE INDEX	:

OPTICAL ROTATION	:

DENSITY	:

SOLUBILITY	:

SPECTRAL DATA

UV SPECTRA	:	lmax (nm): acetonitrile/methanol/THF (58:35:7) 254, 321, 408 (shoulder), 429, 453, %III/II=52.6 [Spectrum 1011] (Ref. 1056/1057); methanol 314, 405 (shoulder), 426, 451 %III/II=52 [Spectrum 1119]

IR SPECTRA	:

NMR SPECTRA	:

MASS SPECTRA	:	FD-MS m/z: 538 (Ref. 1056)

OTHER SPECTRA	:

CHROMATOGRAM DATA

HPLC (column; Novapak C18 (Waters) 8 X 100 mm: eluelnt; acetonitrile/methanol/THF 58:35:7: flow 2.0 ml/min) Rt=18.3 min (Ref. 1056/1057)

SOURCE

CHEMICAL SYNTHESIS

METABOLISM

b-Zeacarotene is the biosynthetic intermediate through cyclization reactions by lycopene b-cyclase from neurosporene to 7,8-dihyro-b-carotene (Ref. 1056).
In E. coli neurosporene background, lycopene b-cyclase from Arabidopsis produces b-zeacarotene (Ref. 1015).

GENETIC INFORMATION

NOTE

REFERENCES

[1015]

AUTHOR	:	Cunningham, F. X., Jr., Pogson, B., Sun, Z., McDonald, K. A., DellaPenna, D., and Gantt, E.
TITLE	:	Functional analysis of the beta and epsilon lycopene cyclase enzymes of Arabidopsis reveals a mechanism for control of cyclic carotenoid formation PubMed ID:8837512
JOURNAL	:	Plant Cell.
VOL	:	8 PAGE : 1613-1626 (1996)

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[1056]

AUTHOR	:	Takaichi, S., Sandmann, G., Schnurr, G., Satomi, Y., Suzuki, A., and Misawa, N.
TITLE	:	The carotenoid 7,8-dihydro-psi end group can be cyclized by the lycopene cyclases from the bacterium Erwinia uredovora and the higher plant Capsicum annuum PubMed ID:8898919
JOURNAL	:	Eur J Biochem.
VOL	:	241 PAGE : 291-296 (1996)

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[1057]

AUTHOR	:	Takaichi, S.
TITLE	:	Characterization of carotenes in a combination of a C₁₈ HPLC column with isocratic elution and absorption spectra with a photodiode-array detector
JOURNAL	:	Photosynth. Res.
VOL	:	65 PAGE : 93 -99 (2000)

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