Bacterial rhodopsins

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Bacteriorhodopsin trimer
Identifiers
Symbol	Bac_rhodopsin
Pfam	PF01036
InterPro	IPR001425
PROSITE	PDOC00291
SCOP	2brd
TCDB	3.E.1
OPM family	6
OPM protein	1vgo
Available PDB structures: 1e12A:29-271 1vgoB:19-253 1s52B:22-244 1r84A:22-245 1ap9 :22-238 1kmeB:22-244 1r2nA:22-255 1pxsA:22-255 1p8uA:22-255 1bac :22-238 1brrA:22-253 1c3wA:22-244 1q5iA:22-255 1jv6A:22-255 1ucqA:22-255 1iw6A:22-255 1x0sA:22-255 1tn5A:22-255 1py6A:22-255 1cwqB:22-253 1p8hA:22-255 1tn0B:22-255 1s54A:22-244 1o0aA:22-255 1s53A:22-244 1pxrA:22-255 1f50A:22-244 1bm1 :22-240 1q5jB:22-255 1jv7A:22-255 1e0pB:22-245 1s51B:22-244 1dzeA:22-255 1qkpA:22-255 2brd :22-241 1m0mA:22-255 1x0k1:22-255 1iw9A:22-255 1c8sA:22-235 1c8rA:22-244 1mgyA:22-255 1fbbA:22-255 1qkoA:22-255 1ixfA:22-255 1m0kA:22-255 1brx :22-241 1fbkA:22-255 1m0lA:22-255 1kg9A:22-244 1s8lA:22-255 1bct :176-244 1vjmA:22-255 1qhjA:22-245 1kg8A:22-244 2at9 :22-240 1bad :22-238 1bhb :22-83 1kgbA:22-244 1bha :22-83 1xjiA:22-255 1p8iA:22-255 1l0mA:22-231 1qm8A:22-255 1x0i1:22-255 1s8jA:22-255 1f4zA:22-244 1jgjA:4-217 1gueA:4-231 1gu8A:4-231 1h2sA:4-225 1xioA:4-233 1sr1 :4-214

Bacterial rhodopsins are a family of bacterial opsins. They are retinal-binding proteins that provide light-dependent ion transport and sensory functions to a family of halophilic^[1]^[2] and other bacteria. They are integral membrane proteins with seven transmembrane helices, the last of which contains the attachment point for retinal (a conserved lysine).

The proteins from halobacteria include bacteriorhodopsin and archaerhodopsin, which are light-driven proton pumps; halorhodopsin, a light-driven chloride pump; and sensory rhodopsin, which mediates both photoattractant (in the red) and photophobic (in the ultra-violet) responses. Proteins from other bacteria include proteorhodopsin.

[edit] References

^ Oesterhelt D, Tittor J (1989). "Two pumps, one principle: light-driven ion transport in halobacteria". Trends Biochem. Sci. 14 (2): 57–61. doi:10.1016/0968-0004(89)90044-3. PMID 2468194.
^ Lottspeich F, Oesterhelt D, Blanck A, Ferrando E, Schegk ES (1989). "Primary structure of sensory rhodopsin I, a prokaryotic photoreceptor". EMBO J. 8 (13): 3963–3971. PMID 2591367.