TAILIEUCHUNG - Báo cáo khoa học: Contributions of host and symbiont pigments to the coloration of reef corals

For a variety of coral species, we have studied the molecular origin of their coloration to assess the contributions of host and symbiont pigments. For the corals Catalaphyllia jardineiand an orange-emitting color morph of Lobophyllia hemprichii, the pigments belong to a particular class of green fluorescent protein-like proteins that change their color from green to red upon irradiation with 400 nm light. | ễFEBS Journal Contributions of host and symbiont pigments to the coloration of reef corals I I 11 I I Z- I I I . 2 1 I I 3 o. I I-S f A I 2 Franz Oswald Florian Schmitt Alexandra Leutenegger Sergey Ivanchenko Cecilia D Angelo Anya Salih4 Svetlana Maslakova5 Maria Bulina6 Reinhold Schirmbeck1 G. U. Nienhaus3 7 Mikhail V. Matz8 and Jorg Wiedenmann2 1 Department of InternalMedicine I University of Ulm Germany 2 Institute of GeneralZoology and Endocrinology University of Ulm Germany 3 Institute of Biophysics University of Ulm Germany 4 Electronic Microscopy Unit University of Sydney NSW Australia 5 Friday Harbor Laboratories University of Washington WA USA 6 Shemiakin Ovchinnikov Institute of Bioorganic Chemistry RAS Moscow Russia 7 Department of Physics University of Illinois at Urbana-Champaign Urbana IL USA 8 Integrative Biology University of Texas in Austin TX USA Keywords coral pigment EosFP fluorescent protein GFP scleractinia Correspondence J. Wiedenmann Department of General Zoology and Endocrinology University of Ulm Albert-Einstein-Allee 11 89069 Ulm Germany Fax 49 731 502 2581 Tel 49 731 502 2591 2584 E-mail Website http biologie1 Wiedenmann Received 7 November 2006 revised 13 December 2006 accepted 19 December 2006 doi For a variety of coral species we have studied the molecular origin of their coloration to assess the contributions of host and symbiont pigments. For the corals Catalaphyllia jardinei and an orange-emitting color morph of Lobophyllia hemprichii the pigments belong to a particular class of green fluorescent protein-like proteins that change their color from green to red upon irradiation with 4 . nm light. The optical absorption and emission properties of these proteins were characterized in detail. Their spectra were found to be similar to those of phycoerythrin from cyanobacterial symbionts. To unambiguously determine the molecular origin of the .

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