PMID: 2106132Feb 1, 1990Paper

Pseudomonas chromosomal replication origins: a bacterial class distinct from Escherichia coli-type origins

Proceedings of the National Academy of Sciences of the United States of America
T W Yee, D W Smith

Abstract

The bacterial origins of DNA replication have been isolated from Pseudomonas aeruginosa and Pseudomonas putida. These origins comprise a second class of bacterial origins distinct from enteric-type origins: both origins function in both Pseudomonas species, and neither functions in Escherichia coli; enteric origins do not function in either pseudomonad. Both cloned sequences hybridize to chromosomal fragments that show properties expected of replication origins. These origin plasmids are highly unstable, are present at low copy number, and show mutual incompatibility properties. DNA sequence analysis shows that both origins contain several 9-base-pair (bp) E. coli DnaA protein binding sites; four of these are conserved in position and orientation, two of which resemble the R1 and R4 sites of the E. coli origin. Conserved 13-bp direct repeats adjacent to the analogous R1 site are also found. No GATC sites are in the P. aeruginosa origin and only four are in the P. putida origin; no other 4-bp sequence is present in high abundance. Both origins are found between sequences similar to the E. coli and Bacillus subtilis dnaA, dnaN, rpmH, and rnpA genes, a gene organization identical to that for B. subtilis and unlike that of E. coli....Continue Reading

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Feb 1, 1994·Molecular & General Genetics : MGG·J Zakrzewska-CzerwińskaH Schrempf
Aug 10, 2000·FEMS Microbiology Letters·A N Suvorov, J J Ferretti
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