Repetitive DNA replication of the incomplete genomes of phage T4 petite particles.
AUTOR(ES)
Kozinski, A W
RESUMO
The genomes of petite T4 phage particles presumably cannot circularize because they are deficient for a significant terminal segment and hence not terminally redundant like normal T4 genomes. Combined density- and 32P-labeling shows that the majority of such deficient DNA molecules can nevertheless replicate their entire length. Furthermore, the density-shift technique shows that replicated parental strands can exchange their partners for new light strands, indicating that noncircularized T4 DNA molecules replicate repeatedly. When taken together with previously published data, these results indicate that T4 replication is bidirectional from multiple, genetically fixed points of origin. Rolling circle models can, therefore, not be considered as an essential mechanism for the early rounds of T4 replication.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=432620Documentos Relacionados
- Superinfection Exclusion by Incomplete Genomes of Bacteriophage T4
- ON THE REPLICATION OF INCOMPLETE CHROMOSOMES OF PHAGE T4*
- Early intracellular events in the replication T4 phage DNA. II. Partially replicated DNA.
- Absence of interparental recombination in multiplicity reconstitution from incomplete bacteriophage T4 genomes.
- Early intracellular events in the replication of T4 phage DNA, IV. Host-mediated single-stranded breaks and repair in ultraviolet-damaged T4 DNA.