The photosynthetic bacteria

Gest, Howard; Kamen, Martin D.

doi:10.1007/978-3-642-94798-8_64

Die CO2-Assimilation / the Assimilation of Carbon Dioxide 1960

DOI: 10.1007/978-3-642-94798-8_64

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The photosynthetic bacteria

Howard Gest¹,

Martin D. Kamen²

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1970

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Cited by 4 publications

(1 citation statement)

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“…cells.-The inhibition of oxygen uptake by light in Athiorhodaceae was first noted a quarter century ago by Nakamura(112) ; see also Gest & Kamen(113).Katoh (114) demonstrated that chromatophores were the site of this competitive interaction between light and dark metabolism. Early in 1954, Kamen & Vernon(32) studied the oxidation of reduced cytochrome c (mammalian) and cytochrome C2 (R. rubrum) by sonic extracts of light grown cells of R. rubrum, Chromatium, etc.…”

mentioning

confidence: 96%

Bacterial Cytochromes: II. Functional Aspects

Horio¹,

Kamen²

1970

Annu. Rev. Microbiol.

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mentioning

confidence: 96%

Bacterial Cytochromes: II. Functional Aspects

Horio¹,

Kamen²

1970

Annu. Rev. Microbiol.

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Metabolic engineering ofRhodopseudomonas palustris for squalene production

Changbin

Shao

et al. 2016

Journal of Industrial Microbiology and Biotechnology

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Squalene is a strong antioxidant used extensively in the food, cosmetic and medicine industries. Rhodopseudomonas palustris TIE-1 was used as the host because of its ability to grow photosynthetically using solar energy and carbon dioxide from atmosphere. The deletion of the shc gene resulted in a squalene production of 3.8 mg/g DCW, which was 27-times higher than that in the wild type strain. For constructing a substrate channel to elevate the conversion efficiency, we tried to fuse crtE gene with hpnD gene. By fusing the two genes, squalene content was increased to 12.6 mg/g DCW, which was 27.4 % higher than that resulted from the co-expression method. At last, the titer of squalene reached 15.8 mg/g DCW by co-expressing the dxs gene, corresponding to 112-fold increase relative to that for wild-type strain. This study provided novel strategies for improving squalene yield and demonstrated the potential of producing squalene by Rhodopseudomonas palustris.

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Genetic Mutations Affecting the Respiratory Electron-Transport System of the Photosynthetic Bacterium Rhodopseudomonas capsulata

1973

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Alternative energy-converting systems permit the nonsulfur purple photosynthetic bacterium Rhodopseudomonas capsulata to grow either with light or (dark) respiration as the source of energy. Respiratory mutants, unable to grow aerobically in darkness, can be readily isolated and the defective step(s) in their respiratory mechanisms can be identified by study of biochemical activities in membrane fragments derived from photosynthetically grown cells. Such analysis of appropriate mutants and revertants permits construction of a model for the respiratory electron-transport system of the wild type. The results obtained indicate differential channeling of electrons derived from succinate and reduced nicotinamide adenine dinucleotide, and are interpreted in terms of a branched electron-transport scheme. The scheme provides a guide for further, more refined analysis of the respiratory mechanisms through biochemical genetic approaches, and several of the mutants isolated can be exploited for investigation of unsolved problems relating to interactions between respiratory and photosynthetic electron transport and the mechanism of inhibition of bacteriochlorophyll synthesis by molecular oxygen.

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The photosynthetic bacteria

Cited by 4 publications

References 122 publications

Bacterial Cytochromes: II. Functional Aspects

Bacterial Cytochromes: II. Functional Aspects

Metabolic engineering ofRhodopseudomonas palustris for squalene production

Genetic Mutations Affecting the Respiratory Electron-Transport System of the Photosynthetic Bacterium Rhodopseudomonas capsulata

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