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Proc. NatI. Acad. Sci. USA Vol. 83, pp. 7850-7854, October 1986
 

Summary: Proc. NatI. Acad. Sci. USA
Vol. 83, pp. 7850-7854, October 1986
Genetics
Two-component regulatory systems responsive to environmental
stimuli share strongly conserved domains with the nitrogen
assimilation regulatory genes ntrB and ntrC
(signal transduction/osmoregulation/phosphate regulation/Agrobacterium virulence/chemotaxis)
B. TRACY NIXON*tt, CLIVE W. RONSON*t§¶, AND FREDERICK M. AUSUBEL*t
*Deparment of Genetics, Harvard Medical School, and tDepartment of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114; and
§Grasslands Division, Department of Scientific and Industrial Research, Private Bag, Palmerston North, New Zealand
Communicated by Philip Leder, July 10, 1986
ABSTRACT We report that the ntrB and ntrC proteins of
Bradyrhizobium sp. [Parasponia] strain RP501 share homology
with other regulatory proteins. There is extensive conservation
of C-terminal regions between products of RP501 ntrB; Kleb-
siellapneumoniae ntrB;Escherichia coli envZ, cpxA, andphoR;
Agrobacterium tumefaciens virA; and, to a lesser extent, E. coli
cheA. There is also extensive conservation of N-terminal
regions between products of RP501 ntrC; K. pneumoniae ntiC;
E. coli ompR, sfrA, phoB, cheY and cheB; Salmonella

  

Source: Ausubel, Frederick M. - Department of Genetics, Harvard University

 

Collections: Biology and Medicine