Molecular Convergence of Infrared Vision in Snakes
Author(s) -
Shozo Yokoyama,
Ahmet Altun,
Dale F. DeNardo
Publication year - 2010
Publication title -
molecular biology and evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.637
H-Index - 218
eISSN - 1537-1719
pISSN - 0737-4038
DOI - 10.1093/molbev/msq267
Subject(s) - biology , ankyrin repeat , amino acid substitution , amino acid , infrared , computational biology , evolutionary biology , transient receptor potential channel , zoology , gene , genetics , receptor , mutation , physics , optics
It has been discovered that the transient receptor potential ankyrin 1 (TRPA1) proteins of Boidae (boas), Pythonidae (pythons), and Crotalinae (pit vipers) are used to detect infrared radiation, but the molecular mechanism for detecting the infrared radiation is unknown. Here, relating the amino acid substitutions in their TRPA1 proteins and the functional differentiations, we propose that three parallel amino acid changes (L330M, Q391H, and S434T) are responsible for the development of infrared vision in the three groups of snakes. Protein modeling shows that the three amino acid changes alter the structures of the central region of their ankyrin repeats.
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