Expressed Vomeronasal Type-1 Receptors (V1rs) in Bats Uncover Conserved Sequences Underlying Social Chemical Signaling

Expressed Vomeronasal Type-1 Receptors (V1rs) in Bats Uncover Conserved Sequences Underlying Social Chemical Signaling
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蝙蝠中表达的犁鼻 1 型受体 (V1rs) 揭示了社会化学信号传导背后的保守序列

DOI:
10.1093/gbe/evz179
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发表时间:
2019
影响因子:
3.3
通讯作者:
Chang, Belinda
Chang, Belinda
中科院分区:
生物学2区
文献类型:
--
作者:
Yohe, Laurel R;Davies, Kalina T;Rossiter, Stephen J;Dávalos, Liliana M;Chang, Belinda

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在哺乳动物中,社会和生殖行为是由犁鼻器中表达的高度多样性受体家族编码的化学信号介导的。在物种之间,完整受体的数量可以按数量级变化。然而,受体数量变化背后的进化过程及其与健身相关行为的联系还没有得到很好的理解。从犁鼻转录组,我们发现了第一个证据的intactvomeronasal 1型受体(V1r)基因在蝙蝠,我们测试是否pupestival功能的蝙蝠受体的orthophoric相关类群,或蝙蝠是否已经演变成新的受体。而不是特定的谱系重复,我们发现,batV1rs显示出高水平的直系亲属,和受体相比,非蝙蝠的净化选择水平。尽管在蝙蝠中犁鼻器的广泛丧失,V1复制体已经保留了超过6500万年。蝙蝠V1rs的高度保守性挑战了我们目前对蝙蝠V1rs功能的理解,并暗示了其在社会行为中的作用,而不是同种识别或交配启动。
In mammals, social and reproductive behaviors are mediated by chemical cues encoded by hyperdiverse families of receptors expressed in the vomeronasal organ. Between species, the number of intact receptors can vary by orders of magnitude. However, the evolutionary processes behind variation in receptor number, and its link to fitness-related behaviors are not well understood. From vomeronasal transcriptomes, we discovered the first evidence of intactvomeronasal type-1 receptor(V1r) genes in bats, and we tested whether putatively functional bat receptors were orthologous to those of related taxa, or whether bats have evolved novel receptors. Instead of lineage-specific duplications, we found that batV1rs show high levels of orthology to those of their relatives, and receptors are under comparative levels of purifying selection as non-bats. Despite widespread vomeronasal organ loss in bats,V1rcopies have been retained for >65 million years. The highly conserved nature of batV1rs challenges our current understanding of mammalianV1rfunction and suggests roles other than conspecific recognition or mating initiation in social behavior.
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