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Regulation of hydrogenase activity in vegetative cells of Anabaena variabilis


, : Regulation of hydrogenase activity in vegetative cells of Anabaena variabilis. Journal of Bacteriology 155(1): 129-137

Heterocyst-free (NH4+-grown) cultures of the cyanobacterium Anabaena variabilis produce a hydrogenase which is reversibly inhibited by light and O2. White or red light at an intensity of 5,000 lx inhibited greater than 95% of the activity. Oxygen at concentrations as low as 0.5% inhibited more than 85% of the hydrogenase in the vegetative cells of CO2-NH4+-grown cultures. The vegatative cell hydrogenase is also sensitive to strong oxidants like ferricyanide. In the presence of strong reductants like S2O4(2-), hydrogenase activity was not inhibited by light. However, hydrogenase activity in the heterocysts was insensitive to both light (greater than 5,000 lx) and O2 (10%). Heterocysts and light-insensitive hydrogenase activity appear simultaneously during differentiation of the vegetative cells into heterocysts (an NH4+-grown culture transferred to NH4+-free, N2-containing medium). This light-insensitive hydrogenase activity was detected several hours before the induction of nitrogenase activity. These results suggest a mode of regulation of hydrogenase in the vegetative cells of A. variabilis that is similar to "redox control" of hydrogenase and other "anaerobic" proteins in enteric bacteria like Escherichia coli.

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Accession: 006288606

PMID: 6408057

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Imanishi, S.; Watanabe, T., 1988: Embryoid formation in the first backcross generation between Lycopersicon esculentum and L. glandulosum. Calluses were formed from leaf explants on MS medium supplemented with 0.75 mg NAA and 1.0 mg benzyladenine/litre. The calluses were cut into small cell masses and cultured on a reciprocal shaker for 9 days in a medium containing 0.1 mg NAA. Embry...

Chinn, S., 1995: Monitoring the growth of children: conclusions from a long-term study. Background. The National Study of Health and Growth (NSHG) was set up in 1972 to monitor the growth of primary school children. Areas were selected in England and Scotland by stratified random sampling. Schools within these areas were visited annu...

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Curasson, M. G., 1941: The piroplasmoses of French West Africa. Observations at the Dakar Laboratory showed that Babesia bigemina was common in W. Africa and is the only piroplasm occurring in cattle in the North Territory. It is usually, but not always, associated with rinderpest or other disease. Nuttallia e...

Johnson, P.; Smillie, L.B., 1974: The amino acid sequence and predicted structure of Streptomyces griseus protease A. Febs Letters 47(1): 1-6

Cherdsuriya, Anurak; Hokama, Hiroto, 1998: Classification approach to ERP research in psychiatry. Koga, Y [Editor], Nagata, K [Editor], Hirata, K [Editor] International Congress Series; Brain topography today 405-408

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