Regulation of nitrogen fixation in Rhodospirillum rubrum grown under dark, fermentative conditions.
AUTOR(ES)
Schultz, J E
RESUMO
Rhodospirillum rubrum was shown to grow fermentatively on fructose with N2 as a nitrogen source. The nitrogenase activity of these cells was regulated by the NH4+ switch-off/switch-on mechanism in a manner identical to that for photosynthetically grown cells. In vitro, the inactive nitrogenase Fe protein from fermenting cells was reactivated by an endogenous membrane-bound, Mn2+-dependent activating enzyme that was interchangeable with the activating enzyme isolated from photosynthetic membranes.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=215926Documentos Relacionados
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