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Evaluation of structurally different carotenoids in Escherichia coli transformants as protectants against UV-B
1Botanisches Institut, Fachbereich Biologie, J. W. Goethe Universität, Frankfurt, Germany. Sandmann@em.uni-frankfurt.d400.de
Applied and Environmental Microbiology
|May 9, 1998
Abstract:
Escherichia coli cells transformed with several carotenogenic genes to mediate the formation of zeta-carotene, neurosporene, lycopene, beta-carotene, and zeaxanthin were exposed to UV-B radiation. Short-term kinetics revealed that endogenous levels of neurosporene and beta-carotene protected E. coli against irradiation with UV-B. Zeaxanthin protected against only the photosensitized UV-B treatment. All other carotenoids were ineffective.