Two pumps, one principle: light-driven ion transport in halobacteria.
Comparison of the primary structure of the chloride pump halorhodopsin with that of the proton pump bacteriorhodopsin provides insight into light-driven ion transport by retinal proteins. Several conserved amino acid residues in the membrane-spanning region of both proteins and their interaction with different isomerization states of retinal are suggested to be the key element for ion transport in both proteins.
Oesterhelt
D
D
Tittor
J
J
D000595:Amino Acid Sequence; D001436:Bacteriorhodopsins / Q000378:metabolism*; D006217:Halobacterium / Q000502:physiology*; D025602:Halorhodopsins; D007473:Ion Channels / Q000032:analysis; D008027:Light; D008969:Molecular Sequence Data
D025602:Halorhodopsins; D007473:Ion Channels; D001436:Bacteriorhodopsins