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Chromatophore (bacteria)

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This article is about the membrane organelle of photosynthetic bacteria. For other uses, see Chromatophore (disambiguation).
Structural model of the chromatophore showing ATP synthase (orange), light-harvesting complexes (green and red), cytochrome bc1 (magenta), and photosynthetic reaction center (blue). Half of the model is transparent to show the bacteriochlorophylls represented as rings.[1]

A chromatophore is a pigmented (colored), membrane-associated vesicle used to perform photosynthesis in some photosynthetic bacteria.

Chromatophores contain bacteriochlorophyll pigments and carotenoids.[2] In purple bacteria, such as Rhodospirillum rubrum, the light-harvesting proteins are intrinsic to the chromatophore membranes. However, in green sulfur bacteria, they are arranged in specialised antenna complexes called chlorosomes.[3]

References

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  1. ^ Sener, Melih; Strumpfer, Johan; Singharoy, Abhishek; Hunter, C Neil; Schulten, Klaus (2016-08-26). Hummer, Gerhard (ed.). "Overall energy conversion efficiency of a photosynthetic vesicle". eLife. 5 e09541. doi:10.7554/eLife.09541. ISSN 2050-084X. PMC 5001839. PMID 27564854.
  2. ^ Salton, MR (1987). "Bacterial membrane proteins". Microbiological Sciences. 4 (4): 100–5. PMID 3153178.
  3. ^ Frigaard, NU; Bryant, DA (2004). "Seeing green bacteria in a new light: genomics-enabled studies of the photosynthetic apparatus in green sulfur bacteria and filamentous anoxygenic phototrophic bacteria". Archives of Microbiology. 182 (4): 265–76. Bibcode:2004ArMic.182..265F. doi:10.1007/s00203-004-0718-9. PMID 15340781.


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