The rep Mutation III. Altered Structure of the Replicating Escherichia coli Chromosome
AUTOR(ES)
Lane, H. E. David
RESUMO
The rep gene function of Escherichia coli is essential for the replication of P2 and φX174 double-stranded deoxyribonucleic acid (DNA). Compared with isogenic rep+ strains, rep mutants show the following characteristics: larger cell size, more DNA per cell, and a slightly lower DNA/mass ratio. The replicating rep chromosomes show a steeper gradient of marker frequencies and contain more replicating forks per chromosome. The nucleoid body of rep mutants sediments faster and contains more DNA. We deduce that the rep function is required for the “normal” replication of the E. coli chromosome and that in its absence the E. coli chromosome replicates in an altered manner, perhaps involving slower-moving replicating forks.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=245842Documentos Relacionados
- Molecular Evolution of the Escherichia Coli Chromosome. III. Clonal Frames
- Molecular Evolution of the Escherichia Coli Chromosome. III. Clonal Frames
- MUTATION IN CONTINUOUS CULTURES III. : Mutational Responses in Escherichia coli
- Stability, structure and complexity of yeast chromosome III.
- Structure of the dsRNA binding domain of E. coli RNase III.
