Diversified Mammalian Visuasl Adaptations to Bright- or Dim-Light Environments.

ABSTRACT: Photic niche shifts of mammals are associated with changing visual capabilities, primarily mediated by three visual pigments, two (SWS1 and M/LWS) of them for color vision and rhodopsin (RH1) for dim-light vision. To further elucidate molecular mechanisms of mammalian visual adaptations to different light environments, a systematic study incorporating evolutionary analyses across diverse groups and in vitro assays have been carried out. Here, we collected gene sequences for the three opsins from 220 species covering all major mammalian clades. After screening for cone opsin gene losses, we estimated selective pressures on each of the three genes and compared the levels of selection experienced by species living in bright- and dim-light environments. SWS1 pigment is shown to experience acce

SUBMITTER: Gai Y 

PROVIDER: S-EPMC10075062 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature