Cell-cell interactions in conjugating Escherichia coli: role of F pili and fate of mating aggregates.
AUTOR(ES)
Achtman, M
RESUMO
Bacterial conjugation between Escherichia coli cells was investigated by a combination of physical and genetic techniques, using Hfr, F', or R+ donors and F- recipients. DNA transfer occurred in mating aggregates of up to 50 cells. Multiple interactions between donor and recipient cells occurred, and both F- pilus connections and wall-to-wall contacts were detectable. The detectable F- pilus contacts could be destroyed without either disrupting the mating aggregates or preventing DNA transfer. Hfr X F- mating aggregates did not disaggregate even though recombinant frequencies were inversely proportional to the distance from the origin of DNA transfer. F' or R+ donors formed mating aggregates with F- cells which disaggregated soon after transfer of the autonomous sex factor DNA.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=222482Documentos Relacionados
- Cell-cell interactions in conjugating Escherichia coli: purification of F pili with biological activity.
- Cell--cell interactions in conjugating Escherichia coli: role of traT protein in surface exclusion.
- Escherichia coli K-12 cell-cell interactions seen by time-lapse video.
- Cell-Cell Recognition in Saccharomyces cerevisiae: Regulation of Mating-Specific Adhesion
- Cell-cell interactions in synovitis: Interactions between T lymphocytes and synovial cells