Carotenoids in Rhodoplanes species: variation of compositions and substrate specificity of predicted carotenogenesis enzymes.

Current Microbiology
S TakaichiAkira Hiraishi

Abstract

Phototrophic bacteria necessarily contain carotenoids for photosynthesis, and accumulate unusual carotenoids in some cases. The carotenoids in all established species of Rhodoplanes (Rpl.), a representative of phototrophic genera, were identified using spectroscopic methods. The major carotenoid was spirilloxanthin in Rpl. roseus and Rpl. serenus, and rhodopin in "Rpl. cryptolactis". Rpl. elegans contained rhodopin, anhydrorhodovibrin, and spirilloxanthin. Rpl. pokkaliisoli contained not only rhodopin but also 1,1'-dihydroxylycopene and 3,4,3',4'-tetrahydrospirilloxanthin. These variations in carotenoid composition suggested that Rpl. roseus and Rpl. serenus had normal substrate specificity of the carotenogenesis enzymes of CrtC (acyclic carotene 1,2-hydratase), CrtD (acyclic carotenoid 3,4-desaturase), and CrtF (acyclic 1-hydroxycarotenoid methyltransferase). On the other hand, CrtC of Rpl. elegans, CrtD of "Rpl. cryptolactis", and CrtC, CrtD, and CrtF of Rpl. pokkaliisoli might have different characteristics from the usual activity of these normal enzymes in the normal spirilloxanthin pathway. These results suggest that the variation of carotenoids among the species of Rhodoplanes results from modified substrate specificity o...Continue Reading

References

Jan 1, 1967·Archiv für Mikrobiologie·K E EimhjellenJ Traetteberg
Feb 24, 2001·International Journal of Systematic and Evolutionary Microbiology·J F Imhoff, N Pfennig
Jun 4, 2005·Applied and Environmental Microbiology·Luan TaoQiong Cheng
Feb 27, 2009·International Journal of Systematic and Evolutionary Microbiology·Keiko OkamuraAkira Hiraishi
Jul 17, 2009·International Journal of Systematic and Evolutionary Microbiology·K V N S LakshmiCh V Ramana
Sep 8, 2010·International Journal of Systematic and Evolutionary Microbiology·V Venkata RamanaCh V Ramana

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Citations

Nov 2, 2013·Chemical Reviews·Alexander R MoiseEleanore T Wurtzel
Sep 7, 2017·International Journal of Systematic and Evolutionary Microbiology·Akira Hiraishi, Keiko Okamura
Apr 13, 2017·BMC Microbiology·Surajit De MandalNachimuthu Senthil Kumar
Jul 17, 2021·Journal of Biotechnology·Leepica Kapoor, Siva Ramamoorthy

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