Adaptive Evolution of Sperm Bindin Tracks Egg Incompatibility in Neotropical Sea Urchins of the Genus Echinometra
نویسندگان
چکیده
منابع مشابه
Adaptive evolution of sperm bindin tracks egg incompatibility in neotropical sea urchins of the genus Echinometra.
Bindin is a gamete recognition protein known to control species-specific sperm-egg adhesion and membrane fusion in sea urchins. Previous analyses have shown that diversifying selection on bindin amino acid sequence is found when gametically incompatible species are compared, but not when species are compatible. The present study analyzes bindin polymorphism and divergence in the three closely r...
متن کاملLack of character displacement in the male recognition molecule, bindin, in Altantic sea urchins of the genus Echinometra.
Bindin, a protein involved in sea urchin sperm-egg recognition and adhesion, is under positive selection in genera with sympatric species but evolves neutrally in genera in which all species are allopatric. This pattern has led to suggestions that reinforcement may be the source of the observed selection. Reproductive character displacement, or increased divergence of reproductive characters in...
متن کاملSpecies-specific sperm adhesion in sea urchins. A quantitative investigation of bindin- mediated egg agglutination
Bindin, a protein component of the acrosomal vesicle of sea urchin sperm, has been isolated from Arbacia punctulata and strongylocentrous purpuratus. Using this isolated bindin, we have devised a quantitative assay for bindin-mediated egg agglutination and compared the agglutination of bindin eggs from A. puntulata and S. purpuratus. Bindin- mediated agglutination is species -specific in both s...
متن کاملThe molecular evolution of sperm bindin in six species of sea urchins (Echinoida: Strongylocentrotidae).
The acrosomal protein bindin attaches sperm to eggs during sea urchin fertilization. Complementary to ongoing functional biochemical studies, I take a comparative approach to explore the molecular evolution of bindin in a group of closely related free-spawning echinoid species. Two alleles of the mature bindin gene were sequenced for each of six species in the sea urchin family Strongylocentrot...
متن کاملThe evolution of sea urchin sperm bindin.
Sea urchins have been model organisms for the study of fertilization for more than a century. Fertilization in sea urchins happens externally, which facilitates the study of sperm-egg attachment and fusion, and means that all of the molecules involved in gamete recognition and fusion are associated with the gametes. Sea urchin sperm bindin was the first "gamete recognition protein" to be isolat...
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ژورنال
عنوان ژورنال: Molecular Biology and Evolution
سال: 2004
ISSN: 1537-1719,0737-4038
DOI: 10.1093/molbev/msh071