bacteriorhodopsin
A light-driven proton-pumping protein (248 residues, 26 kD), similar to rhodopsin, found in "purple patches" in the cytoplasmic membrane of the bacterium Halobacterium halobium. It is composed of 7 transmembrane helices, and contains the light-absorbing chromophore, retinal. Light absorption maxima: 568nm (light-adapted) ; 558nm (dark-adapted). Each photon results in the movement of 2 protons from cytoplasmic to extracellular sides of the membrane. The resulting proton gradient is used (amongst other things) to drive synthesis of ATP by chemiosmosis.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • Bacteriorhodopsin — is a protein used by archaea, most notably halobacteria. It acts as a proton pump, i.e. it captures light energy and uses it to move protons across the membrane out of the cell. The resulting proton gradient is subsequently converted into… …   Wikipedia

  • Bacteriorhodopsin — Vorhandene Strukturdaten: s. UniProt …   Deutsch Wikipedia

  • bacteriorhodopsin —  Bacteriorhodopsin  Бактериородопсин   Мембранный белок, обнаруженный в морской архебактерии Halobacterium halobium. Присутствует в специализированных бляшках бактериальной цитоплазматической мембраны, называемой пурпурной мембраной, образуя там… …   Толковый англо-русский словарь по нанотехнологии. - М.

  • bacteriorhodopsin — [bak tir΄ē ō΄rō däp′sin] n. a purple protein containing retinal and found in the plasma membrane of certain bacteria (genus Halobacterium): it directly supplies electrochemical energy from sunlight …   English World dictionary

  • bacteriorhodopsin — noun Date: 1971 a purple pigmented protein that is found in the outer membrane of a bacterium (Halobacterium salinarium syn. H. halobium) and that converts light energy into chemical energy in the synthesis of ATP …   New Collegiate Dictionary

  • bacteriorhodopsin — /bak tear ee oh roh dop sin/, n. Biochem. a protein complex in the membrane of halobacteria that conducts a unique form of photosynthesis, employing the light sensitive pigment retinal rather than the chlorophyll used by all other known… …   Universalium

  • bacteriorhodopsin — noun Any of several related purple photosynthetic proteins, found in halobacteria, that act as proton pumps. See Also: proteorhodopsin …   Wiktionary

  • bacteriorhodopsin — bac·te·ri·o·rho·dop·sin bak .tir ē ō rō däp sən n a purple pigmented protein that is found in the outer membrane of a bacterium (Halobacterium salinarium syn. H. halobium) and that converts light energy into chemical energy in the synthesis of… …   Medical dictionary

  • bacteriorhodopsin — bac·te·rio·rhodopsin …   English syllables

  • bacteriorhodopsin — bac•te•ri•o•rho•dop•sin [[t]bækˌtɪər i oʊ roʊˈdɒp sɪn[/t]] n. biochem. a protein complex that contains retinal and is used by halobacteria for photosynthesis instead of chlorophyll • Etymology: 1975–80 …   From formal English to slang

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