Pigment composition of the photosynthetic membrane and reaction center of the green bacterium Prosthecochloris aestuarii

Braumann, Thomas; Vasmel, Henk; Grimme, L. Horst; Amesz, J.

doi:10.1016/0005-2728(86)90163-5

Cited by 44 publications

(16 citation statements)

References 25 publications

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“…As far as we know an absorption spectrum of a pure monomeric compound has only been published by Braumann et al (1986) for 8,12-diethyl BChl c in a solvent mixture, whereas spectral data for 8-ethyl-12-methyl (stearyl) BChl c are given by Brune et al (1988). For BChl d and e only spectra for mixtures of homologues have been published (Gloe et al 1975, Oelze 1985, Hoff and Amesz 1991.…”

Section: Vibrioforme Contained Significant Amountsmentioning

confidence: 99%

Identification of the major chlorosomal bacteriochlorophylls of the green sulfur bacteria Chlorobium vibrioforme and Chlorobium phaeovibrioides; their function in lateral energy transfer

Otte¹,

Meent

Veelen

et al. 1993

Photosynth Res

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The chlorosomal bacteriochlorophyll (BChl) composition of the green sulfur bacteria Chlorobium vibrioforme and Chlorobium phaeovibrioides was investigated by means of normal-phase high-performance liquid chromatography. From both species a number of homologues was isolated, which were identified by absorption and (252)Cf-plasma desorption mass spectroscopy. Besides BChl d, C. vibrioforme contained a significant amount of BChl c, which may provide an explanation for the previous observation of at least two spectrally different pools of BChl in the chlorosomes of green sulfur bacteria (Otte et al. 1991). C. phaeovibrioides contained various homologues of BChl e only. Absorption spectra in acetone of BChl c, d and e, as well as bacteriopheophytin e are presented. No systematic differences were found for the various homologues of each pigment. In addition to farnesol, the mass spectra revealed the presence of various minor esterifying alcohols in both species, including phytol, oleol, cetol and 4-undecyl-2-furanmethanol, as well as an alcohol of low molecular mass, which is tentatively assumed to be decenol.

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Section: Vibrioforme Contained Significant Amountsmentioning

confidence: 99%

Identification of the major chlorosomal bacteriochlorophylls of the green sulfur bacteria Chlorobium vibrioforme and Chlorobium phaeovibrioides; their function in lateral energy transfer

Otte¹,

Meent

Veelen

et al. 1993

Photosynth Res

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“…The chlorosomes contain the bulk of the BChl c, together with small amounts of BChl a , while most of the BChl a is accounted for by the BChl a protein. The core complex contains the reaction center (Hurt and Hauska 1984), together with some BChl a and a BChl c-like pigment (Vasmel et al 1983, Braumann et al 1986). …”

Section: Introductionmentioning

confidence: 99%

A comparative study of the optical characteristics of intact cells of photosynthetic green sulfur bacteria containing bacteriochlorophyll c, d or e

et al. 1991

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Energy transfer and pigment arrangement in intact cells of the green sulfur bacteria Prosthecochloris aestuarii, Chlorobium vibrioforme and chlorobium phaeovibrioides, containing bacteriochlorophyll (BChl) c, d or e as main light harvesting pigment, respectively, were studied by means of absorption, fluorescence, circular dichroism and linear dichroism spectroscopy at low temperature. The results indicate a very similar composition of the antenna in the three species and a very similar structure of main light harvesting components, the chlorosome and the membrane-bound BChl a protein. In all three species the Qy transition dipoles of BChl c, d or e are oriented approximately parallel to the long axis of the chlorosome. Absorption and fluorescence excitation spectra demonstrate the presence of at least two BChl c-e pools in the chlorosomes of all three species, long-wavelength absorbing BChls being closest to the membrane. In C. phaeovibrioides, energy from BChl e is transferred with an efficiency of 25% to the chlorosomal BChl a at 6 K, whereas the efficiency of transfer from BChl e to the BChl a protein is 10%. These numbers are compatible with the hypothesis that the chlorosomal BChl a is an intermediary in the energy transfer from the chlorosome to the membrane.

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“…The ET components of the green gliding bacterium Chloroflexus aurantiacus are identical to those of the purple bacteria, with A2 a MQ (Vasmel and Amesz, 1983). For the green sulfur bacteria, D is in all likelihood a BChl a dimer (Swarthoff et al, 1981a), Al a BChl c monomer (Braumann and Vasmel, 1986) and A2 a ferredoxin (Jennings and Evans, 1977;Swarthoff et al, 1981b). D + A ; .…”

Section: Bacterial Reaction Centersmentioning

confidence: 96%

Magnetic Interactions Between Photosynthetic Reactants

Hoff

1986

Photochem & Photobiology

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Pigment composition of the photosynthetic membrane and reaction center of the green bacterium Prosthecochloris aestuarii

Cited by 44 publications

References 25 publications

Identification of the major chlorosomal bacteriochlorophylls of the green sulfur bacteria Chlorobium vibrioforme and Chlorobium phaeovibrioides; their function in lateral energy transfer

Identification of the major chlorosomal bacteriochlorophylls of the green sulfur bacteria Chlorobium vibrioforme and Chlorobium phaeovibrioides; their function in lateral energy transfer

A comparative study of the optical characteristics of intact cells of photosynthetic green sulfur bacteria containing bacteriochlorophyll c, d or e

Magnetic Interactions Between Photosynthetic Reactants

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