Selection in the rapid evolution of gamete recognition proteins in marine invertebrates.
Selection in the rapid evolution of gamete recognition proteins in marine invertebrates.
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DOI：
10.1101/cshperspect.a002931
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发表时间：
2011-11
影响因子：
7.2
通讯作者：
V. Vacquier;W. Swanson
中科院分区：
文献类型：
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作者：
V. Vacquier;W. Swanson
动物受精是由精子和卵子表面蛋白质的相互作用（结合）控制的。在本文提出的许多例子中，受精蛋白快速进化并显示出正选择的特征（适应性进化）。这篇综述描述了海胆、鲍鱼和牡蛎中受精蛋白的分子进化，这些动物通过体外受精将配子传播到海水中。讨论了许多受精蛋白中看到的正选择驱动的快速进化的选择力理论。这种作用于相互作用的受精蛋白分歧的强烈选择可能导致合子前生殖隔离，并成为物种形成过程中的一个重要因素。由于所有卵子中只有一小部分能够受精，并且只有极小部分的雄配子能够成功地使卵子受精，因此配子显然是一类受到严格选择的实体。奇怪的是，在有关选择的文献中从未提及这一点，也许是因为我们对配子之间的适应性差异知之甚少。 （恩斯特·迈尔，1997）。
Animal fertilization is governed by the interaction (binding) of proteins on the surfaces of sperm and egg. In many examples presented herein, fertilization proteins evolve rapidly and show the signature of positive selection (adaptive evolution). This review describes the molecular evolution of fertilization proteins in sea urchins, abalone, and oysters, animals with external fertilization that broadcast their gametes into seawater. Theories regarding the selective forces responsible for the rapid evolution driven by positive selection seen in many fertilization proteins are discussed. This strong selection acting on divergence of interacting fertilization proteins might lead to prezygotic reproductive isolation and be a significant factor in the speciation process. Since only a fraction of all eggs are fertilized and only an infinitesimal fraction of male gametes succeed in fertilizing an egg, gametes are obviously a category of entities subjected to intense selection. It is curious that this is never mentioned in the literature dealing with selection, perhaps because we know so little about fitness differences among gametes. (Ernst Mayr, 1997).