Hemoproteins of Bradyrhizobium japonicum Cultured Cells and Bacteroids-Reference-Cited by-同舟云学术

Hemoproteins of Bradyrhizobium japonicum Cultured Cells and Bacteroids

Published:1990-09 Issue:9 Volume:56 Page:2736-2741
ISSN:0099-2240
Container-title:Applied and Environmental Microbiology
language:en
Short-container-title:Appl Environ Microbiol

Author:

Keister Donald L.¹,Marsh Sarah S.¹

Affiliation:

1. Soybean and Alfalfa Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Bldg. 011, HH-19, BARC-West, Beltsville, Maryland 20705, and Battelle, Columbus, Ohio 432012

Abstract

The hemoprotein content of 17 strains of Bradyrhizobium japonicum bacteroids from field-grown plants and the corresponding strains of cultured cells was determined spectrally. The major terminal oxidases, cytochromes (cyt) aa 3 and o , were present in all strains of cultured cells. cyt aa 3 was present in significant amounts in bacteroids only in strains of DNA homology group II. cyt o appeared to be present in bacteroids of all strains, and the average level was the same as in cultured cells. cyt b and c in the membrane fractions were higher in bacteroids of all strains compared with cultured cells. cyt P-450 was present in both the membrane and soluble fractions of bacteroids of most strains. The total P-450 content varied sixfold among strains. A CO-reactive hemoprotein, P-422, was present in the soluble fraction of all strains of cultured cells. P-422 may be a hemoglobinlike protein, and it was present in significant amounts in bacteroids only in DNA homology group I strains.

Publisher

American Society for Microbiology

Subject

Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology

Link

https://journals.asm.org/doi/pdf/10.1128/aem.56.9.2736-2741.1990

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