Results 11 to 20 of about 23,776 (285)

The Gluopsins: Opsins without the Retinal Binding Lysine

Cells, 2022
Opsins allow us to see. They are G-protein-coupled receptors and bind as ligand retinal, which is bound covalently to a lysine in the seventh transmembrane domain. This makes opsins light-sensitive.
Martin Gühmann, Megan L. Porter, Michael J. Bok   +2 more
doaj   +2 more sources

The evolution of opsin genes in five species of mirid bugs: duplication of long-wavelength opsins and loss of blue-sensitive opsins

BMC Ecology and Evolution, 2021
Background Color vision and phototactic behavior based on opsins are important for the fitness of insects because of their roles in foraging and mate choice.
Pengjun Xu, Bin Lu, Jiangtao Chao, Robert Holdbrook, Gemei Liang, Yanhui Lu   +5 more
doaj   +2 more sources

Nematostella vectensis exemplifies the exceptional expansion and diversity of opsins in the eyeless Hexacorallia

EvoDevo, 2023
Background Opsins are the primary proteins responsible for light detection in animals. Cnidarians (jellyfish, sea anemones, corals) have diverse visual systems that have evolved in parallel with bilaterians (squid, flies, fish) for hundreds of millions ...
Kyle J. McCulloch, Leslie S. Babonis, Alicia Liu, Christina M. Daly, Mark Q. Martindale, Kristen M. Koenig   +5 more
doaj   +2 more sources

Effect of Altered Retinal Cones/Opsins on Refractive Development under Monochromatic Lights in Guinea Pigs

Journal of Ophthalmology, 2018
Purpose. To analyze the changes of refraction and metabolism of the retinal cones under monochromatic lights in guinea pigs. Methods. Sixty guinea pigs were randomly divided into a short-wavelength light (SL) group, a middle-wavelength light (ML) group ...
Leilei Zou, Xiaoyu Zhu, Rui Liu, Fei Ma, Manrong Yu, Hong Liu, Jinhui Dai   +6 more
doaj   +2 more sources

TMT-Opsins differentially modulate medaka brain function in a context-dependent manner.

PLoS Biology, 2021
Vertebrate behavior is strongly influenced by light. Light receptors, encoded by functional opsin proteins, are present inside the vertebrate brain and peripheral tissues.
Bruno M Fontinha, Theresa Zekoll, Mariam Al-Rawi, Miguel Gallach, Florian Reithofer, Alison J Barker, Maximilian Hofbauer, Ruth M Fischer, Arndt von Haeseler, Herwig Baier, Kristin Tessmar-Raible   +10 more
doaj   +2 more sources

Spectral tuning mediated by helix III in butterfly long wavelength-sensitive visual opsins revealed by heterologous action spectroscopy

Zoological Letters, 2019
Absorption spectra of opsin-based pigments are tuned from the UV to the red regions by interactions of the chromophore with surrounding amino acid residues. Both vertebrates and invertebrates possess long-wavelength-sensitive (LWS) opsins, which underlie
Tomoka Saito, Mitsumasa Koyanagi, Tomohiro Sugihara, Takashi Nagata, Kentaro Arikawa, Akihisa Terakita   +5 more
doaj   +2 more sources

Opsin vs opsin: new materials for biotechnological applications [PDF]

J. Appl. Phys. 116, 064901 (2014), 2014
The need of new diagnostic methods satisfying, as an early detection, a low invasive procedure and a cost-efficient value, is orienting the technological research toward the use of bio-integrated devices, in particular bio-sensors.
Alfinito, E., Reggiani, L.
core   +2 more sources

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

BMC Ecology and Evolution, 2021
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)
Polina Drozdova, Alena Kizenko, Alexandra Saranchina, Anton Gurkov, Maria Firulyova, Ekaterina Govorukhina, Maxim Timofeyev   +6 more
doaj   +2 more sources

Active state structures of a bistable visual opsin bound to G proteins [PDF]

Nature Communications
Opsins are G protein-coupled receptors (GPCRs) that have evolved to detect light stimuli and initiate intracellular signaling cascades. Their role as signal transducers is critical to light perception across the animal kingdom.
Oliver Tejero, Filip Pamula, Mitsumasa Koyanagi, Takashi Nagata, Pavel Afanasyev, Ishita Das, Xavier Deupi, Mordechai Sheves, Akihisa Terakita, Gebhard F. X. Schertler, Matthew J. Rodrigues, Ching-Ju Tsai   +11 more
doaj   +2 more sources

The crowns have eyes: multiple opsins found in the eyes of the crown-of-thorns starfish Acanthaster planci

BMC Evolutionary Biology, 2018
Background Opsins are G protein-coupled receptors used for both visual and non-visual photoreception, and these proteins evolutionarily date back to the base of the bilaterians.
Elijah K. Lowe, Anders L. Garm, Esther Ullrich-Lüter, Claudia Cuomo, Maria I. Arnone   +4 more
doaj   +2 more sources