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We describe here the cloning of single EcoRI fragments from the tra region of F DNA using ColE1::Tn3 as vector. These plasmids, as well as the series of Skurray et al. (Proc. Natl. Acad. Sci. U.S.A. 73:64-68, 1976), have been used to refine the map positions of tra cistrons on the F factor as well as to define a new DNA transfer cistron, traM. The current map of the tra cistrons is presented. None of the known tra cistrons, with the exception of traG, straddles an EcoRI site. The EcoRI site at 82 kilobases splits the traG cistron into two portions, an operator-proximal portion necessary for F pilus synthesis and an operator distal portion involved in conjugation itself. The operon structure of the tra cistrons was reevaluated, and we found that traI is at least partially independent of transcription of the traA to traD operon.
M Achtman, and
R A Skurray, and
R Thompson, and
R Helmuth, and
S Hall, and
L Beutin, and
A J Clark
June 1978,
Plasmid,
M Achtman, and
R A Skurray, and
R Thompson, and
R Helmuth, and
S Hall, and
L Beutin, and
A J Clark
October 1975,
Nature,
M Achtman, and
R A Skurray, and
R Thompson, and
R Helmuth, and
S Hall, and
L Beutin, and
A J Clark
October 1978,
Molecular & general genetics : MGG,
M Achtman, and
R A Skurray, and
R Thompson, and
R Helmuth, and
S Hall, and
L Beutin, and
A J Clark
October 1979,
Proceedings of the National Academy of Sciences of the United States of America,
M Achtman, and
R A Skurray, and
R Thompson, and
R Helmuth, and
S Hall, and
L Beutin, and
A J Clark
April 1982,
Journal of bacteriology,
M Achtman, and
R A Skurray, and
R Thompson, and
R Helmuth, and
S Hall, and
L Beutin, and
A J Clark
January 1979,
Molecular & general genetics : MGG,
M Achtman, and
R A Skurray, and
R Thompson, and
R Helmuth, and
S Hall, and
L Beutin, and
A J Clark
September 1979,
Journal of bacteriology,
M Achtman, and
R A Skurray, and
R Thompson, and
R Helmuth, and
S Hall, and
L Beutin, and
A J Clark
July 1989,
Plasmid,
M Achtman, and
R A Skurray, and
R Thompson, and
R Helmuth, and
S Hall, and
L Beutin, and
A J Clark
April 1980,
Journal of molecular biology,
M Achtman, and
R A Skurray, and
R Thompson, and
R Helmuth, and
S Hall, and
L Beutin, and
A J Clark
February 1978,
Plasmid,
