Nucleic Acids Research, 1988, Vol. 16, No. 14 6531-6546
© 1988
Articles |
RNA-primed intitiation sites of DNA replication in the origin region of bacteriophage
genome
Department of Molecular Biology, School of Science, Nagoya University Chikusa-ku, Nagoya 464-01, Japan
+To whom correspondence should be addressed
Received March 8, 1988.
Using DNA molecules synthesized in the early stage of
phage infection, deoxynucleotides at the transition sites from primer RNA to DNA synthesis have been mapped in the 1.5 kbase area of the
phage genome containing the genetically defined replication origin (ori
). Sites in the 1-strand (the polarity of the 1-strand is 5' to 3' from the left to the right direction of the
phage genetic map) were distributed both inside and outside of the ori
, whereas the sites in the r-strand (the strand in the opposite polarity) were mainly distributed more than three hundred nueleotides apart from the ori
to the right. A CPuPu sequence was found at 12 to 10 region of transition sites of the r- and the 1-strands in the frequency of 80% and 70%, respectively, and over 60% of the CPuPu sequences were CAG. Properties of the transition sites are discussed in relation to the primer synthesis.
*Laboratory of Molecular Biology, Toyohaahi University of Technology, Tenpaku-3, cho, Toyohaahi, Aichi 440, Japan
**Institute of Health and Epidemic Prevention, Jiangau Province, P.R.China
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