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Azotobacter vinelandii : ウィキペディア英語版
Azotobacter vinelandii

''Azotobacter vinelandii'' is gram-negative diazotroph that can fix nitrogen while grown aerobically. It is a genetically tractable system that is used to study nitrogen fixation. These bacteria are easily cultured and grown.
''A. vinelandii'' is a free-living N2 fixer known to produce many phytohormones and vitamins in soils. It produces fluorescent pyoverdine pigments.〔Menhart, N., Thariath, A., Viswanatha, T. (1991) Characterization of the pyoverdines of Azotobacter vinelandii ATCC 12837 with regard to heterogeneity. ''Biology of Metals'' 4(4):223-32〕
The nitrogenase holoenzyme of ''Azotobacter vinelandii'' has been characterised ''via'' x-ray crystallography in both ADP tetrafluoroaluminate-bound〔Schindelin, H., Kisker, C., Schlessman, J.L., Howard, J.B., Rees, D.C. (1997) Structure of ADP x AIF4(-)-stabilized nitrogenase complex and its implications for signal transduction. ''Nature'' 387: 370-376〕 and MgATP-bound〔Chiu, H., Peters, J.W., Lanzilotta, W.N., Ryle, M.J., Seefeldt, L.C., Howard, J.B., Rees, D.C. (2001) MgATP-Bound and nucleotide-free structures of a nitrogenase protein complex between the Leu 127 Delta-Fe-protein and the MoFe-protein. ''Biochemistry'' 40: 641-650〕 states. The enzyme possesses molybdenum iron-sulfido cluster cofactors (FeMoco) as active sites, each bearing 2 pseudo-cubic iron-sulfido structures.
== References ==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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