中文题名 / Chinese title: 科摩罗腔棘鱼色觉的适应性演化
英文题名 / English title: Adaptive evolution of color vision of the Comoran coelacanth (Latimeria chalumnae).
作者 / Authors: Yokoyama S, Zhang H, Radlwimmer FB, Blow NS.
期刊 / Journal: PNAS
年份 / Year: 1999
DOI: 10.1073/pnas.96.11.6279
论文链接 / Article: https://doi.org/10.1073/pnas.96.11.6279
摘要来源 / Abstract source: https://europepmc.org/article/MED/10339578

英文摘要原文 / Original English abstract
The coelacanth, a "living fossil," lives near the coast of the Comoros archipelago in the Indian Ocean. Living at a depth of about 200 m, the Comoran coelacanth receives only a narrow range of light, at about 480 nm. To detect the entire range of "color" at this depth, the coelacanth appears to use only two closely related paralogous RH1 and RH2 visual pigments with the optimum light sensitivities (lambdamax) at 478 nm and 485 nm, respectively. The lambdamax values are shifted about 20 nm toward blue compared with those of the corresponding orthologous pigments. Mutagenesis experiments show that each of these coadapted changes is fully explained by two amino acid replacements.

摘要依据的主要发现 / Findings based on the abstract
腔棘鱼 RH1 与 RH2 视觉色素的敏感峰约为478和485纳米，与深水环境狭窄的蓝光光谱相适应。突变实验表明，各自的光谱变化可由两个氨基酸替换解释。
The coelacanth's RH1 and RH2 pigments peak near 478 and 485 nanometres, matching the narrow blue light spectrum of its deep-water habitat. Mutagenesis attributes each spectral shift to two amino-acid substitutions.

摘要依据的结论 / Conclusions based on the abstract
少量分子变化即可使祖先视觉色素适应特殊的深水光照环境。
Small molecular changes can tune ancestral visual pigments to a specialized deep-water light environment.

可用全文文件 / Available full-text files