Bacteriochlorophyll g. A new bacteriochlorophyll from Heliobacterium chlorum

Brockmann, Hans; Lipinski, Annemarie

doi:10.1007/bf00415603

Cited by 146 publications

(89 citation statements)

References 6 publications

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“…Under these conditions, average molecular ions at m/z 819 and 797 were observed for bacteriochlorophyll and bacteriophaeophytin g, respectively [75], differing in 22 Da, the expected mass difference between magnesium-chelated and unchelated (bacterio)chlorophylls. Ions occurring at [M-204] + were also observed in the mass spectra, indicating bacteriochlorophyll g was esterified by farnesol, and not geranyl geraniol as previously suggested [74]. - [66].…”

Section: Heliobacteriasupporting

confidence: 66%

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Mass Spectrometry of Chlorophylls from Phototrophic Prokaryotes

Airs¹

2018

COC

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Phototrophic prokaryotes inhabit a diverse array of environments on our planet and also contain a wide range of chlorophylls and bacteriochlorophylls, encompassing both chlorin and bacteriochorin structures. Mass spectrometry, particularly coupled with liquid chromatography and used in conjunction with soft ionization techniques, has been pivotal in the assignment of closely related chlorophyll and bacteriochlorophyll structures from these organisms. This review considers the ecological niches of the phototrophic prokaryotes, together with the mass spectrometric study of their chlorophyll and bacteriochlorophyll pigments.

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Section: Heliobacteriasupporting

confidence: 66%

“…Heliobacteria are anoxygenic phototrophs that contain bacteriochlorophyll g as their sole chlorophyll pigment [73,74]. They are primarily soil residents, and are widely distributed in the soils of rice paddy fields.…”

Section: Heliobacteriamentioning

confidence: 99%

Mass Spectrometry of Chlorophylls from Phototrophic Prokaryotes

Airs¹

2018

COC

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“…These organisms contain a previously unknown chemical form of bacteriochlorophyll, namely bacteriochlorophyll g (BChl g) as the principal pigment [3], localized in the cytoplasma membrane. The organism lacks chlorosomes as well as a developed intracytoplasmic membrane system.…”

Section: Introductionmentioning

confidence: 99%

Evidence for a unique Rieske iron‐sulphur centre in Heliobacterium chlorum

Liebl¹,

Rutherford²,

Nitschke³

1990

FEBS Letters

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An iron sulphur centre (gz = 2.035, g, = 1 X9, g, = 1.8 l), which can be observed in both whole cells and isolated plasma membranes of Heliobacterium chlorum, was identified as a Rieske centre on the basis of its sensitivity to the inhibitors 2,5-dibromo-3-methyl-6-isopropyl-benzoquinone (DBMIB), 5-(n-undecyl)-6-hydroxy-4,7-dioxobenzothiazole (UHDBT) and stigmatellin as well as on the basis of its orientation (g. is oriented perpendicular and g, is oriented parallel to the membrane plane). Its midpoint potential is unusually low (Em,, = + 12Ok 10 mV) and does not depend on pH in the range between pH 6.5 and pH 8.0. The effects of the inhibitors on the EPR spectrum are altered compared to Rieske centres in other systems. The significance of the low E, is discussed with regard to the overall midpoint potentials of the electron transfer chain in Heliobucterium chlorum.

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“…The recent discovery of a strictly anaerobic phototrophic bacterium, Heliobacterium chlorum [4], that contains a previously unknown bacteriochlorophyll (BChl g) [5] provides the opportunity to extend our knowledge of photosynthesis over a broader range of organisms. Here we describe the membrane structure, antenna absorption and reaction center photochemistry of this unusual organism.…”

Section: Introductionmentioning

confidence: 99%

A unique photosynthetic reaction center from Heliobacterium chlorum

et al. 1985

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A previously unknown type of photosynthetic reaction center in the brownish‐green bacterium Heliobacterium chlorum is described. The reaction center is tightly bound in a highly proteinaceous undifferentiated plasma membrane and contains bacteriochlorophyll g, which has major in vivo absorbancies at 788, 576 and 370 nm. The purified membrane shows a reversible photobleaching at 798 nm; the reaction center bacteriochlorophyll g is designated P798. A reversible photobleaching at 553 nm is assigned to photooxidation of a membrane‐bound c‐type cytochrome. The membrane structure, pigment composition and photochemical properties suggest that H. chlorum may represent a fifth family of anoxygenic photosynthetic procaryotes.

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Bacteriochlorophyll g. A new bacteriochlorophyll from Heliobacterium chlorum

Cited by 146 publications

References 6 publications

Mass Spectrometry of Chlorophylls from Phototrophic Prokaryotes

Mass Spectrometry of Chlorophylls from Phototrophic Prokaryotes

Evidence for a unique Rieske iron‐sulphur centre in Heliobacterium chlorum

A unique photosynthetic reaction center from Heliobacterium chlorum

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