Zobrazeno 1 - 10 of 28 pro vyhledávání: '"D. C. Yoch"'
1
Evidence for NH4+ switch-off regulation of nitrogenase activity by bacteria in salt marsh sediments and roots of the grass Spartina alterniflora
Autor: D C Yoch, G J Whiting
Publikováno v: Applied and Environmental Microbiology. 51:143-149
The regulatory effect of NH4+ on nitrogen fixation in a Spartina alterniflora salt marsh was examined. Acetylene reduction activity (ARA) measured in situ was only partially inhibited by NH4+ in both the light and dark after 2 h. In vitro analysis of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a2db9953fcdfafd9bcdcf005c12105a
https://doi.org/10.1128/aem.51.1.143-149.1986
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2
Changes in amino acid and nucleotide pools of Rhodospirillum rubrum during switch-off of nitrogenase activity initiated by NH4+ or darkness
Autor: D. C. Yoch, Chang-Zhang Hu, J. Li
Publikováno v: Journal of Bacteriology. 169:231-237
Amino acid and nucleotide pools were measured in nitrogenase-containing Rhodospirillum rubrum cultures during NH4+- or dark-induced inactivation (switch-off) of the Fe protein. A big increase in the glutamine pool size preceded NH4+ switch-off of nit
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d5cb5c7a8b7f4c2e642bb0a64d920f2
https://doi.org/10.1128/jb.169.1.231-237.1987
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3
High and low reduction potential 4Fe-4S clusters in Azotobacter vinelandii (4Fe-4S) 2ferredoxin I. Influence of the polypeptide on the reduction potentials
Autor: J C Rabinowitz, W V Sweeney, D C Yoch
Publikováno v: Journal of Biological Chemistry. 250:7842-7847
Azotobacter vinelandii (4Fe-4S)2 ferredoxin I (Fd I) is an electron transfer protein with Mr equals 14,500 and Eo equals -420 mv. It exhibits and EPR signal of g equals 2.01 in its isolated form. This resonance is almost identical with the signal tha
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https://doi.org/10.1016/s0021-9258(19)40892-2
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4
Evidence for a glutamine synthetase-chromatophore association in the phototroph Rhodospirillum rubrum: purification, properties, and regulation of the enzyme
Autor: M Cantu, Z M Zhang, D C Yoch
Publikováno v: Journal of Bacteriology. 154:632-639
The characteristics of soluble and membrane-bound glutamine synthetase (GS) from Rhodospirillum rubrum were compared with those of the enzyme located in situ (measured in detergent-treated cells). The results suggest that in vivo GS may be associated
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https://doi.org/10.1128/jb.154.2.632-639.1983
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5
Characterization of two soluble ferredoxins as distinct from bound iron-sulfur proteins in the photosynthetic bacterium Rhodospirillum rubrum
Autor: D I Arnon, W V Sweeney, D C Yoch
Publikováno v: Journal of Biological Chemistry. 250:8330-8336
In an earlier investigation (Shanmugam, K. T., Buchanan, B. B., and Arnon, D. I. (1972) Biochim. Biophys. Acta 256, 477-486) the extraction of ferredoxin from Rhodospirillum rubrum cells with the aid of a detergent (Triton X-100) and acetone revealed
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https://doi.org/10.1016/s0021-9258(19)40763-1
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6
Plasmidless, photosynthetically incompetent mutants of Rhodospirillum rubrum
Autor: D C Yoch, L T Wimer, S A Kuhl
Publikováno v: Journal of Bacteriology. 159:913-918
Ethyl methanesulfonate rendered a high percentage of Rhodospirillum rubrum cells plasmidless and photosynthetically incompetent (Kuhl et al., J. Bacteriol. 156:737-742, 1983). By probing restriction endonuclease-digested chromosomal DNA from these pl
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a95e68a3a3a1e5adbf71698c4f58417f
https://doi.org/10.1128/jb.159.3.913-918.1984
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8
Purification and Mn2+ activation of Rhodospirillum rubrum nitrogenase activating enzyme
Autor: J W Gotto, D C Yoch
Publikováno v: Journal of Bacteriology. 152:714-721
The Fe protein activating enzyme for Rhodospirillum rubrum nitrogenase was purified to approximately 90% homogeneity, using DE52-cellulose chromatography and sucrose density gradient centrifugation. Activating enzyme consists of a single polypeptide
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https://doi.org/10.1128/jb.152.2.714-721.1982
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9
Regulation of nitrogenase A and R concentrations in Rhodopseudomonas capsulata by glutamine synthetase
Autor: D C Yoch
Publikováno v: Biochemical Journal. 187:273-276
Nitrogen-starved purple non-sulphur bacteria have an active unregulated form of nitrogenase (nitrogenase A); however, the nitrogenase of a glutamine synthetase-negative mutant of Rhodopseudomonas capsulata, when nitrogen-starved, was predominantly in
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64f245cd7eee1a1e69c1304480881dda
https://doi.org/10.1042/bj1870273
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10
Changes in the regulatory form of Rhodospirillum rubrum nitrogenase as influenced by nutritional and environmental factors
Autor: M Cantu, D C Yoch
Publikováno v: Journal of Bacteriology. 142:899-907
The photosynthetic bacterium Rhodospirillum rubrum regulates the activity of its nitrogenase (N2ase) by interconverting the enzyme into three distinct enzymatic species: N2ase A (a fully active form) and two regulatory forms, N2ase Ractive and N2ase
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https://doi.org/10.1128/jb.142.3.899-907.1980
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