The parapinopsin of lamprey is a UV-sensitive opsin (λ max = 370 nm). [81] The teleosts have two groups of parapinopsins, one is sensitive to UV (λ max = 360-370 nm), the other is sensitive to blue (λ max = 460-480 nm) light. [82]

2021年2月9日 · Opsins, combined with a chromophore, are the primary light-sensing molecules in animals and are crucial for color vision. Throughout animal evolution, duplications and losses of opsin proteins...

2005年6月3日 · The parapinopsin recently found in the pineal organ of the lamprey is a UV-sensitive and bistable opsin with stable dark and light-activated states. VA-opsin is found in the salmon retina but in amacrine and horizontal cells (two kinds of neural cell in the retina), not in rod and cone visual cells .

1998年4月1日 · The UV opsin cDNA encodes a protein of 371 amino acids that is most closely related to the UV-sensitive Drosophila Rh3 and Rh4 opsins. To test whether these novel Apis opsin genes encode functional visual pigments and to determine their spectral properties, we expressed them in the R1–6 photoreceptor cells of blind ninaE mutant Drosophila ...

2014年9月1日 · Here we characterize a UV opsin (LpUVOps1) that is expressed in all three types of L. polyphemus eyes. It is expressed in most photoreceptors in median ocelli, the only L. polyphemus eyes in which UV sensitivity was previously detected, and in the dendrite of eccentric cells in lateral compound eyes.

2015年10月15日 · We could recover sequences of the UV sensitive SWS1 opsin in 40 out of 58 species, belonging to 6 families. In all of these species, the evidence suggests the presence of functional SWS1 opsins under purifying selection, potentially allowing UV vision.

2005年6月15日 · We cloned and sequenced a UV opsin mRNA transcript from Bombus impatiens head-specific cDNA and, using western blot analysis, detected an eye protein band of ∼41 kDa,corresponding to the predicted molecular mass of the encoded opsin. We then characterized UV opsin expression in the retina, ocelli and brain using immunocytochemistry.

Objectives: To investigate the function and potential mechanism of opsin 5 (OPN5), a photoreceptor responsive to UVR wavelengths, in melanogenesis in HEMs. Methods: Melanin content in HEMs was determined using the NaOH method, and activity of tyrosinase (TYR) (a key enzyme in melanin synthesis) was determined by the l-DOPA method.

2024年4月16日 · Most vertebrates possess one rod opsin, the rhodopsin (RH1), often used for scotopic vision, and four basic types of cone opsins mediating colour vision: the short-wavelength-sensitive opsins with SWS1 absorbing in the UV (λ max 347–383 nm) and SWS2 absorbing in the violet-blue regions of the spectrum (λ max 397–482 nm); the middle ...

OPN5 was capable of activating heterotrimeric G protein Gi in a UV-dependent manner. Immuno-blotting analyses of mouse tissue extracts identified the retina, the brain and, unexpectedly, the outer ears as the major sites of OPN5 expression.