The composition of the chlorosomes is mostly bacteriochlorophyll (BChl) with small amounts of carotenoids and quinones surrounded by a galactolipid monolayer. (wikipedia.org)
Current models of the organization of bacteriochlorophyll and carotenoids (the main constituents) inside the chlorosomes have put them in a lamellar organization, where the long farnesol tails of the bacteriochlorophyll intermix with carotenoids and each other, forming a structure resembling a lipid multilayer. (wikipedia.org)
Chloroflexus aggregans contains chlorosomes with bacteriochlorophyll a and c as the main photosynthetic pigments. (up.ac.za)
The chlorosome antenna of Chloronema consists of bacteriochlorophyll (BChl) d and BChl c together with gamma-carotene as the main carotenoid. (bvsalud.org)
Heteronuclear 2-D and 3-D magic-angle spinning NMR dipolar correlation spectroscopy was applied to determine solid-state 1H shifts for aggregated bacteriochlorophyll c (BChl c) in uniformly 13C-enriched light harvesting chlorosomes of the green photosynthetic bacterium Chlorobium tepidum. (wur.nl)
The absorption spectrum of whole cells was dominated by the chlorosome bacteriochlorophyll c (BChl c ) peak at 759 nm, with fluorescence emission at 760 nm. (uibk.ac.at)
Bacteria9
A chlorosome is a photosynthetic antenna complex found in green sulfur bacteria (GSB) and many green non-sulfur bacteria (GNsB), together known as green bacteria. (wikipedia.org)
Inside green sulfur bacteria, the chlorosomes are attached to type-I reaction centers in the cell membrane via FMO-proteins and a chlorosome baseplate composed of CsmA proteins. (wikipedia.org)
Because they have been so difficult to study, the chlorosomes in green sulfur bacteria are the last class of light-harvesting complexes to be characterized structurally by scientists. (wikipedia.org)
The chlorosomes were isolated from the mutant and the wild-type forms of the bacteria. (wikipedia.org)
Structure and function of the Q-type centers in Chloroflexus and purple bacteria, comparison with photosystem II. (elte.hu)
Membrane (LHI és LHII) and membrane attached antennae (FMO, chlorosomes) in bacteria. (elte.hu)
The chlorosomes were found to be ellipsoidal and of various sizes, characteristics that are comparable to characteristics of chlorosomes in other species of green photosynthetic bacteria. (uibk.ac.at)
Analysis of the proteins in the chlorosomes revealed an ∼6-kDa band, which was found to be related to the BChl c binding protein CsmA found in other green bacteria. (uibk.ac.at)
Chlorobium1
Finally, protein analysis of Chloronema chlorosomes using SDS-PAGE and MALDI-TOF-MS revealed the presence of a chlorosomal polypeptide with a molecular mass of 5.7 kDa, resembling the CsmA protein found in Chloroflexus aurantiacus and Chlorobium tepidum chlorosomes. (bvsalud.org)
BChl5
Within the chlorosome, the thousands of BChl pigment molecules have the ability to self assemble with each other, meaning they do not interact with protein scaffolding complexes for assembly. (wikipedia.org)
This single emission, assigned to BChl c, indicates an energy transfer from BChl d to BChl c within the same chlorosome. (bvsalud.org)
A complete assignment of 29 different observable resonances of the 61 protons of the aggregated BChl c in the intact chlorosomes is obtained. (wur.nl)
The analogy between aggregation shifts for BChl c in the chlorosome and for self-assembled chlorophyll a/H2O is explored, and a bilayer model for the tubular supra-structure of sheets of BChl c is proposed, from a homology modeling approach. (wur.nl)
All of these results suggest that BChl c is present in the chlorosomes of " Ca . Chlorothrix halophila," that BChl a is present in the baseplate, and that there is a membrane-bound antenna complex. (uibk.ac.at)
Baseplate1
Fluorescence emission spectra obtained at 77 K revealed another complex that fluoresced at 820 nm, which probably resulted from the chlorosome baseplate complex. (uibk.ac.at)
Ellipsoidal2
Chlorosomes are ellipsoidal bodies, in GSB their length varies from 100 to 200 nm, width of 50-100 nm and height of 15 - 30 nm, in GNsB the chlorosomes are somewhat smaller. (wikipedia.org)
Chlorosome shape can vary between species, with some species containing ellipsoidal shaped chlorosomes and others containing conical or irregular shaped chlorosomes. (wikipedia.org)
Chlorophyll3
Genetic techniques to create a mutant bacterium with a more regular internal structure, cryo-electron microscopy to identify the larger distance constraints for the chlorosome, solid-state nuclear magnetic resonance (NMR) spectroscopy to determine the structure of the chlorosome's component chlorophyll molecules, and modeling to bring together all of the pieces and create a final picture of the chlorosome. (wikipedia.org)
The images reveal that the chlorophyll molecules inside chlorosomes have a nanotube shape. (wikipedia.org)
The team then used MAS NMR spectroscopy to resolve the microscopic arrangement of chlorophyll inside the chlorosome. (wikipedia.org)
Chlorobi1
In Chlorobi, chlorosome monolayers can contain up to eleven different proteins. (wikipedia.org)
Bacterium1
The absorption and fluorescence properties of chlorosomes of the filamentous anoxygenic phototrophic bacterium Chloronema sp. (bvsalud.org)
Pigment1
Despite this pigment heterogeneity, fluorescence emission of the chlorosomes showed a single peak centered at 765 nm upon excitation at wavelengths ranging from 710 to 740 nm. (bvsalud.org)
Small1
Likewise, incubation of chlorosomes under reducing conditions caused a weak increase in fluorescence emission, which indicates a small redox-dependent fluorescence. (bvsalud.org)
Photosynthetic2
A chlorosome is a photosynthetic antenna complex found in green sulfur bacteria (GSB) and many green non-sulfur bacteria (GNsB), together known as green bacteria. (wikipedia.org)
The green photosynthetic bacterium Chloroflexus aurantiacus, which belongs to the phylum of filamentous anoxygenic phototrophs, does not contain a cytochrome bc or bf type complex which is found in all other known groups of phototrophs. (bvsalud.org)
Filamentous1
The light-harvesting-reaction center (LHRC) complex from the chlorosome-lacking filamentous anoxygenic phototroph (FAP), Roseiflexus castenholzii (R. castenholzii) was purified and characterized for overall pigment organization. (bvsalud.org)
Green2
Inside green sulfur bacteria, the chlorosomes are attached to type-I reaction centers in the cell membrane via FMO-proteins and a chlorosome baseplate composed of CsmA proteins. (wikipedia.org)
Because they have been so difficult to study, the chlorosomes in green sulfur bacteria are the last class of light-harvesting complexes to be characterized structurally by scientists. (wikipedia.org)