期刊
ACTA CRYSTALLOGRAPHICA SECTION F-STRUCTURAL BIOLOGY COMMUNICATIONS
卷 68, 期 -, 页码 846-853出版社
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S1744309112026103
关键词
bathochromic shift; astaxanthin; colouration; recombinant carotenoproteins; lobster carapace
资金
- NIDCD NIH HHS [R01 DC002366] Funding Source: Medline
Crustacean crustacyanin proteins are linked to the production and modification of carapace colour, with direct implications for fitness and survival. Here, the structural and functional properties of the two recombinant crustacyanin subunits H1 and H2 from the American lobster Homarus americanus are reported. The two subunits are structurally highly similar to the corresponding natural apo crustacyanin CRTC and CRTA subunits from the European lobster H. gammarus. Reconstitution studies of the recombinant crustacyanin proteins H1 and H2 with astaxanthin reproduced the bathochromic shift of 8595 nm typical of the natural crustacyanin subunits from H. gammarus in complex with astaxanthin. Moreover, correlations between the presence of crustacyanin genes in crustacean species and the resulting carapace colours with the spectral properties of the subunits in complex with astaxanthin confirmed this genotypephenotype linkage.
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