Results 11 to 20 of about 15,921 (237)

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

Journal of Applied Physics, 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

Light and myopia: a focus on the expanding role of non-visual opsins [PDF]

Eye and Vision
Myopia, or near-sightedness, is a growing global concern as its incidence rate continues to dramatically rise. It has been linked to significant ocular morbidity and reduced quality of life.
Kate Gettinger, Kazuo Tsubota, Kazuno Negishi, Toshihide Kurihara   +3 more
doaj   +2 more sources

Discovery and design of photocyclic animal opsins: potential application to gene therapy from non-visual opsin research [PDF]

Eye and Vision
Opsins are universal photoreceptive proteins in animals. Rhodopsin is the best-studied opsin and functions as a visual sensor in rod cells of human and mouse retinas.
Takahiro Yamashita
doaj   +2 more sources

Dragonfly red opsins share a common tuning mechanism with mammalian red opsins and further enhancement of near-infrared sensitivity [PDF]

Cellular and Molecular Life Sciences
Some animals, such as primates and insects have color vision including sensitivity to red light (red vision). Red vision is basically achieved through opsins sensitive to the red region (red opsins), which independently evolved in different lineages.
Ryu Sato, Akihisa Terakita, Mitsumasa Koyanagi   +2 more
doaj   +2 more sources

An Ocean of Opsins. [PDF]

Genome Biol Evol
Abstract In this study, we explored the diversity and evolution of opsins using meta-omic data from the Tara Oceans and Tara Polar Circle expeditions, one of the largest marine datasets available. By using sequence similarity methods and phylogenetic analyses, we identified opsins across the different metazoan groups.
De Vivo G, Pelletier E, Feuda R, D'Aniello S.   +3 more
europepmc   +2 more sources

Coral anthozoan-specific opsins employ a novel chloride counterion for spectral tuning [PDF]

eLife
Animal opsins are G protein-coupled receptors that have evolved to sense light by covalently binding a retinal chromophore via a protonated (positively charged) Schiff base. A negatively charged amino acid in the opsin, acting as a counterion, stabilizes
Yusuke Sakai, Saumik Sen, Tomohiro Sugihara, Yukiya Kakeyama, Makoto Iwasaki, Gebhard FX Schertler, Xavier Deupi, Mitsumasa Koyanagi, Akihisa Terakita   +8 more
doaj   +2 more sources

Opsin evolution in the Ambulacraria [PDF]

Marine Genomics, 2015
Opsins - G-protein coupled receptors involved in photoreception - have been extensively studied in the animal kingdom. The present work provides new insights into opsin-based photoreception and photoreceptor cell evolution with a first analysis of opsin ...
A. Valero-Gracia, A. Wanninger, Brandenburger, Braun, Burke, C.J. Lowe, Cannon, Delroisse, Delroisse, Delroisse, E. Ullrich-Lüter, E.K. Lowe, Edgar, Edgecombe, Feuda, Feuda, Galtier, Gouy, Guindon, Hargrave, Holland, J. Delroisse, J. Mallefet, J.T. Cannon, Johnsen, K.M. Halanych, Koyanagi, Kumar, Kusakabe, M. Byrne, M.I. Arnone, M.R. Elphick, Metschnikoff, Nezlin, Nielsen, O'Hara, Ooka, P. Flammang, Palczewski, Plachetzki, Porter, Raible, Randel, S. D'Aniello, S. Kaul-Strehlow, Shichida, Tamura, Telford, Terakita, Terakita, Ullrich-Lüter, Ullrich-Lüter, Whelan   +52 more
core   +5 more sources

Opsins and melanopsins [PDF]

Current Biology, 2002
What are opsins? Opsins are generally considered members of the superfamily of G-protein coupled receptors. But not all opsins activate a G-protein. Their distinguishing features are a 7 transmembrane α-helical structure, and an ability to bind a vitamin A chromophore, retinaldehyde, using a lysine in the 7th α-helix.
Foster, Russell, Bellingham, James
openaire   +3 more sources

The two-photon reversible reaction of the bistable jumping spider rhodopsin-1 [PDF]

, 2019
Bistable opsins are photopigments expressed in both invertebrates and vertebrates. These light-sensitive G-protein-coupled receptors undergo a reversible reaction upon illumination.
Deupi, Xavier, Ehrenberg, David, Heberle, Joachim, Koyanagi, Mitsumasa, Lesca, Elena, Schertler, Gebhard F. X., Terakita, Akihisa, Varma, Niranjan   +7 more
core   +1 more source

Evolutionary ecology of opsin gene sequence, expression and repertoire. [PDF]

, 2017
Linking molecular evolution to biological function is a long-standing challenge in evolutionary biology. Some of the best examples of this involve opsins, the genes that encode the molecular basis of light reception.
Owens, Gregory L, Rennison, Diana J
core   +1 more source