|Superclasses:||a macrocycle → a chlorin → a bacteriochlorin|
|an organometallic compound|
Bacteriochlorophyll c is found in the chlorosomes of certain bacteria, such as Chlorobium limicola. Chlorosomes are very large light-harvesting organelles (~1,500 bacteriochlorophyll molecules per reaction center), found only in green sulfur bacteria and green filamentous bacteria. Based on electron microscopic observations, chlorosomes are filled with 10-30 rod-shaped elements which are oriented parallel to the long axis of the chlorosomes and have a diameter of 10 nm. According to the present model, each rod consists of a tubular bilayer formed by self-organization of the antenna bacteriochlorophyll molecules.
Unlike all other known photosynthetic antenna, in which the chlorophyll molecules are bound to proteins, chlorosomes do not contain accessory proteins. Bacteriochlorophyll c molecules from Chlorobium limicola were shown to form piggyback-dimer-based parallel layers within the chlorosomes [Egawa07].
The R groups in the structure can be either methyl groups or hydrogen atoms.
Unification Links: PubChem:25244615
Egawa07: Egawa A, Fujiwara T, Mizoguchi T, Kakitani Y, Koyama Y, Akutsu H (2007). "Structure of the light-harvesting bacteriochlorophyll c assembly in chlorosomes from Chlorobium limicola determined by solid-state NMR." Proc Natl Acad Sci U S A 104(3);790-5. PMID: 17215361
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