Protein
Bacteriorhodopsin-II-like protein
Organism
Haloquadratum walsbyi (strain DSM 16790 / HBSQ001)
Function
Has no proton-pumping activity but is potentially capable of functioning as a sensory SRII-like protein. The chromophore contains 36.5% all-trans-, 7.6% 11-cis- and 56.4% 13-cis-retinal in the dark and 30.1% 11-cis- and 47.7% 13-cis-retinal upon illumination with >460 nm light.
Similarity
Belongs to the archaeal/bacterial/fungal opsin family.
Sequence
MATPGSEATWLWIGTIGMVLGTVYFAVRGRGSTDPEQQTYYIITTLIPAIAAAAYLAMATGLGVISMPIRGTEVIDIYWARYADWLLTTPLLIIDLALVAGARKQTLYKLIIIDAIMILGGLAGSMMQQGAVIRIVWWAVSTAAFIILLYYLLGELSERARSRSAETGIVFNRLRNITLGLWALYPIVWILGTGGGFGIIAVTTEIMLYVMLDIGTKIGFGAVLLESQDVLQAASHPSSTNDIKSH