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Proc. Nati. Acad. Sci. USA Vol. 88, pp. 4565-4569, June 1991
 

Summary: Proc. Nati. Acad. Sci. USA
Vol. 88, pp. 4565-4569, June 1991
Biochemistry
Photosynthetic electron transport controls nitrogen assimilation in
cyanobacteria by means of posttranslational modification of the
glnB gene product
(cloning/sequencing/uridylylation/photosystem/NH4I concentration)
N. F. TSINOREMAS*t, A. M. CASTETS*, M. A. HARRISONt*, J. F. ALLENt§¶, AND N. TANDEAU DE MARSAC*
*Unitd de Physiologie Microbienne, DNpartement de Biochimie et G6ndtique Moldculaire, Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15,
France; and tDepartments of Biochemistry and Molecular Biology and Pure and Applied Biology, The University of Leeds, Leeds LS2 9JT, England
Communicated by Charles J. Arntzen, January 22, 1991
ABSTRACT A glnB gene is identified in the cyanobacte-
rium Synechococcus sp. PCC 7942, and its gene product is
found to be covalently modified as a result of imbalance in
electron transfer in photosynthesis, where photosystem II is
favored over photosystem I. The gene was cloned and se-
quenced and found to encode a polypeptide of 112 amino acid
residues, whose sequence shows a high degree of similarity to
the Escherichia coli regulatory protein, PI,. In E. coli, PI, is
involved in signal transduction in transcriptional and post-

  

Source: Allen, John F. - School of Biological and Chemical Sciences, Queen Mary, University of London

 

Collections: Renewable Energy; Biology and Medicine