Structural Studies of Carotenoids in Plants, Animals, and Food Products

Maoka, Takashi

doi:10.1002/9781118622223.ch7

Cited by 17 publications

(22 citation statements)

References 36 publications

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“…The identification of individual carotenoids was carried out using our routine method 8 . The UV-VIS spectra were recorded with a Hitachi U-2001 spectrophotometer Hitach Field Navigator, Tokyo, Japan in ether.…”

Section: Carotenoid Extraction Isolation and Identi Cationmentioning

confidence: 99%

“…Yellow xanthophylls fraction obtained from preparative HPLC was saponified with 5 KOH/MeOH at room temperature for 3 hrs, as usual manner 8 . They were re-chromotographed by silica gel HPLC Cosmosil 5SL-II with acetone: n-hexane 4:…”

Section: Characterization Of Yellow Xanthophyllsmentioning

confidence: 99%

“…3. According to the additive rule of CD spectra of carotenoid 8,15 , the 3R,4S,5R,6R,6 S configuration was postulated for this compound.…”

Section: Expmentioning

confidence: 99%

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Structures of Yellow Xanthophylls and Metabolism of Astaxanthin in the Prawn Penaeus japonicus

2018

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INTRODUCTION The prawn Penaeus japonicus Kurumaebi in Japanese is one of the largest species of prawns and one of the most economically important species of shrimp in Japan. This prawn is a highly regarded food consumed as sashimi, as broiled with salt, as tempura, etc. Cultured specimens account for more than 80 of the prawn market in Japan. They are mainly cultured in Okinawa, Kagoshima, and Kumamoto Prefecture. Not only body weight and flesh quality but also body color is an important commercial quality criterion. It is well-known that the predominant pigment of the prawn is astaxanthin along with some minor yellow colored xanthophylls 1, 2. Therefore, astaxanthin is used for the pigmentation of cultured prawn 3, 4. Paracoccus carotinifaciens 5 is an aerobic gram-negative, halophilic, astaxanthin-producing bacterium and its dry-powder form is referred to PANAFERD-AX ® , which contains 3S,3 S-astaxanthin as a major carotenoid. It is used for the pigmentation of cultured fish such as salmon and trout, and has on excellent pigmentation-promoting effect on these fish 6. Therefore, we administered PAN-AFERD-AX ® for pigmentation of the prawn P. japonicus.

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Section: Carotenoid Extraction Isolation and Identi Cationmentioning

confidence: 99%

Section: Characterization Of Yellow Xanthophyllsmentioning

confidence: 99%

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Structures of Yellow Xanthophylls and Metabolism of Astaxanthin in the Prawn Penaeus japonicus

2018

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“…The column used was a 250 4.6 mm i.d., 5 μm Cosmosil 5SL-II Nacalai Tesque, Japan with acetone:n-hexane 2:8, v/v as a solvent at a flow rate of 1.0 mL/min. We identified the presence of optical isomers of astaxanthin and adonirubin using the Sumichiral OA-2000 chiral column with nhexane:CHCl 3 :EtOH 48:16:1, v/v at a flow rate of 1.0 mL/ min and detection at 470 nm 4 . Esterified adonirubin and astaxanthin underwent hydrolysis with lipase to form free adonirubin and astaxanthin, which were then submitted for chiral HPLC 4 .…”

Section: Carotenoid Extraction Isolation and Identi Cationmentioning

confidence: 99%

“…We dissolved the residue in acetone:n-hexane 2:8, v/v and subjected it to HPLC on silica gel with acetone:n-hexane 2:8, v/v . Individual carotenoids were identified using our standard method 4 . UV-Visible spectra were recorded with a Hitachi U-2001 spectrophotometer in Et 2 O.…”

Section: Carotenoid Extraction Isolation and Identi Cationmentioning

confidence: 99%

Carotenoids of Red, Brown, and Black Specimens of Plectropomus leopardus, the Coral Trout (Suziara in Japanese)

et al. 2017

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Promiscuous activity of β‐carotene hydroxylase CrtZ on epoxycarotenoids leads to the formation of rare carotenoids with 6‐hydroxy‐3‐keto‐ε‐ends

2022

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Carotenoids with rare 6‐hydroxy‐3‐keto‐ε‐end groups, such as piprixanthin, vitixanthin, or cochloxanthin, found in manakin birds or plants, are rare carotenoids with high antioxidant activity. The same chemical structure is found in abscisic acid or blumenol, apocarotenoids found in plants or fungi. In this study, we serendipitously discovered that the promiscuous activity of the β‐carotene hydroxylase CrtZ, a diiron‐containing membrane protein, can catalyze the formation of 6‐hydroxy‐3‐keto‐ε‐end by using epoxycarotenoids antheraxanthin or violaxanthin as substrate. We suggest that the reaction mechanism is similar to that of a rhodoxanthin biosynthetic enzyme. Our results provide a further understanding of the reaction mechanism of diiron‐containing β‐carotene hydroxylases, as well as insight into the biosynthesis of natural compounds with 6‐hydroxy‐3‐keto‐ε‐end carotenoid derivatives.

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Structural Studies of Carotenoids in Plants, Animals, and Food Products

Cited by 17 publications

References 36 publications

Structures of Yellow Xanthophylls and Metabolism of Astaxanthin in the Prawn <i>P</i><i>enaeus japonicus</i>

Structures of Yellow Xanthophylls and Metabolism of Astaxanthin in the Prawn <i>P</i><i>enaeus japonicus</i>

Carotenoids of Red, Brown, and Black Specimens of <i>Plectropomus leopardus</i>, the Coral Trout (<i>Suziara</i> in Japanese)

Promiscuous activity of β‐carotene hydroxylase CrtZ on epoxycarotenoids leads to the formation of rare carotenoids with 6‐hydroxy‐3‐keto‐ε‐ends

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