Down-Regulation of the Ultraviolet-Sensitive Visual Pigment of the Cockroach Decreases the Masking Effect in Short-Wavelength Illumination

2021 ◽  
Author(s):  
E. S. Novikova ◽  
I. Yu. Severina ◽  
I. L. Isavnina ◽  
M. I. Zhukovskaya
Keyword(s):  
Visual Pigment ◽  
Short Wavelength ◽  
Masking Effect ◽  
Down Regulation

Molecular Basis of Spectral Tuning in the Newt Short Wavelength Sensitive Visual Pigment†

Biochemistry ◽  
2003 ◽  
Vol 42 (20) ◽  
pp. 6025-6034 ◽  
Author(s):  
Yusuke Takahashi ◽  
Thomas G. Ebrey
Keyword(s):  
Visual Pigment ◽  
Short Wavelength ◽  
Molecular Basis ◽  
Spectral Tuning

The Photobleaching Sequence of a Short-Wavelength Visual Pigment†

Biochemistry ◽  
2001 ◽  
Vol 40 (26) ◽  
pp. 7832-7844 ◽  
Author(s):  
Anakarin Kusnetzow ◽  
Abhiram Dukkipati ◽  
Kunnel R. Babu ◽  
Deepak Singh ◽  
Bryan W. Vought ◽  
...  
Keyword(s):  
Visual Pigment ◽  
Short Wavelength

scholarly journals SWS2 visual pigment evolution as a test of historically contingent patterns of plumage color evolution in Warblers

2015 ◽  
Author(s):  
Natasha Bloch ◽  
James M Morrow ◽  
Belinda SW Chang ◽  
Trevor D Price
Keyword(s):  
Visual Pigment ◽  
Short Wavelength ◽  
New World ◽  
Historical Contingency ◽  
Spectral Tuning ◽  
Plumage Color ◽  
Old World ◽  
Color Evolution ◽  
Color Differences ◽  
Visual Pigment Evolution

Distantly related clades that occupy similar environments may differ due to the lasting imprint of their ancestors – historical contingency. The New World warblers (Parulidae) and Old World warblers (Phylloscopidae) are ecologically similar clades that differ strikingly in plumage coloration. We studied genetic and functional evolution of the short-wavelength sensitive visual pigments (SWS2 and SWS1) to ask if altered color perception could contribute to the plumage color differences between clades. We show SWS2 is short-wavelength shifted in birds that occupy open environments, such as finches, compared to those in closed environments, including warblers. Sequencing of opsin genes and phylogenetic reconstructions indicate New World warblers were derived from a finch-like form that colonized from the Old World 15-20Ma. During this process the SWS2 gene accumulated 6 substitutions in branches leading to New World warblers, inviting the hypothesis that passage through a finch-like ancestor resulted in SWS2 evolution. In fact, we show spectral tuning remained similar across warblers as well as the finch ancestor. Results reject the hypothesis of historical contingency based on opsin spectral tuning, but point to evolution of other aspects of visual pigment function. Using the approach outlined here, historical contingency becomes a generally testable theory in systems where genotype and phenotype can be connected.

scholarly journals Ultraviolet and violet receptors express identical mRNA encoding an ultraviolet-absorbing opsin: identification and histological localization of two mRNAs encoding short-wavelength-absorbing opsins in the retina of the butterfly Papilio xuthus

2000 ◽  
Vol 203 (19) ◽  
pp. 2887-2894 ◽  
Author(s):  
J. Kitamoto ◽  
K. Ozaki ◽  
K. Arikawa
Keyword(s):  
Amino Acid ◽  
Visual Pigment ◽  
Short Wavelength ◽  
Photoreceptor Cells ◽  
Visual Pigments ◽  
Amino Acid Sequences ◽  
Papilio Xuthus ◽  
Different Types ◽  
Identical Amino Acid Sequence

This paper describes the primary structures of two opsins of short-wavelength-absorbing visual pigments deduced from the mRNA sequences in the retina of the Japanese yellow swallowtail butterfly Papilio xuthus. A phylogenetic analysis of the amino acid sequences indicates that one of these visual pigments is of the ultraviolet-absorbing type and that the other is of the blue-absorbing type. We identified the photoreceptor cells that express these mRNAs by histological in situ hybridization. The mRNA of the ultraviolet type is expressed in two distinct photoreceptor types previously identified as ultraviolet and violet receptors, providing the first molecular biological evidence that different types of spectral receptor probably express a visual pigment with an identical amino acid sequence. The mRNA of the blue type is expressed exclusively in cells classified as blue receptors.

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