Photokinetics and Dichroism of Visual Pigments in the Photoreceptors of Eledone (Ozoena) moschata

Faculty Opinions recommendation of Light-Driven Regeneration of Cone Visual Pigments through a Mechanism Involving RGR Opsin in Müller Glial Cells.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.735694591.793559810 ◽

2019 ◽

Author(s):

Theodore Wensel

Keyword(s):

Glial Cells ◽

Visual Pigments ◽

Müller Glial Cells

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Light-stimulated Phosphorylation of Bovine Visual Pigments by Adenosine Triphosphate

Journal of Biological Chemistry ◽

10.1016/s0021-9258(19)44415-3 ◽

1973 ◽

Vol 248 (2) ◽

pp. 596-609

Author(s):

Robert N. Frank ◽

H. Dwight Cavanagh ◽

Kenneth R. Kenyon

Keyword(s):

Adenosine Triphosphate ◽

Visual Pigments

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The diversity of opsins in Lake Baikal amphipods (Amphipoda: Gammaridae)

BMC Ecology and Evolution ◽

10.1186/s12862-021-01806-9 ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Polina Drozdova ◽

Alena Kizenko ◽

Alexandra Saranchina ◽

Anton Gurkov ◽

Maria Firulyova ◽

...

Keyword(s):

Lake Baikal ◽

Visual Pigments ◽

Ancient Lake ◽

Climate History ◽

Habitat Depth ◽

Long Wavelength ◽

Evolutionary Scenario ◽

Evolutionary Changes ◽

Evolutionary Success ◽

Multiple Species

Abstract Background Vision is a crucial sense for the evolutionary success of many animal groups. Here we explore the diversity of visual pigments (opsins) in the transcriptomes of amphipods (Crustacea: Amphipoda) and conclude that it is restricted to middle (MWS) and long wavelength-sensitive (LWS) opsins in the overwhelming majority of examined species. Results We evidenced (i) parallel loss of MWS opsin expression in multiple species (including two independently evolved lineages from the deep and ancient Lake Baikal) and (ii) LWS opsin amplification (up to five transcripts) in both Baikal lineages. The number of LWS opsins negatively correlated with habitat depth in Baikal amphipods. Some LWS opsins in Baikal amphipods contained MWS-like substitutions, suggesting that they might have undergone spectral tuning. Conclusions This repeating two-step evolutionary scenario suggests common triggers, possibly the lack of light during the periods when Baikal was permanently covered with thick ice and its subsequent melting. Overall, this observation demonstrates the possibility of revealing climate history by following the evolutionary changes in protein families.

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