Dynamic relocalization of phage phi 29 DNA during replication and the role of the viral protein p16.7.
We have examined the localization of DNA replication of the Bacillus subtilis phage phi 29 by immunofluorescence. To determine where phage replication was localized within infected cells, we examined the distribution of phage replication proteins and the sites of incorporation of nucleotide analogues into phage DNA. On initiation of replication, the phage DNA localized to a single focus within the cell, nearly always towards one end of the host cell nucleoid. At later stages of the infection cycle, phage replication was found to have redistributed to multiple sites around the periphery of the nucleoid, just under the cell membrane. Towards the end of the cycle, phage DNA was once again redistributed to become located within the bulk of the nucleoid. Efficient redistribution of replicating phage DNA from the initial replication site to various sites surrounding the nucleoid was found to be dependent on the phage protein p16.7.
Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Universidad Autónoma, Canto Blanco, 28049 Madrid, Spain.
W J
WJ
Meijer
P J
PJ
Lewis
J
J
Errington
M
M
Salas
D017103:Bacillus Phages / Q000254:growth & development* / Q000648:ultrastructure; D001412:Bacillus subtilis / Q000648:ultrastructure / Q000821:virology*; D004261:DNA Replication; D004279:DNA, Viral / Q000096:biosynthesis* / Q000302:isolation & purification; D004268:DNA-Binding Proteins / Q000378:metabolism*; D005455:Fluorescent Antibody Technique; D015870:Gene Expression; D016679:Genome, Viral; D008565:Membrane Proteins / Q000378:metabolism; D014764:Viral Proteins / Q000378:metabolism*; D014779:Virus Replication
D004279:DNA, Viral; D004268:DNA-Binding Proteins; D008565:Membrane Proteins; D014764:Viral Proteins