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Cell. 1986 Oct 10;47(1):99-106.

Synthesis of bacteriophage phi X174 in vitro: mechanism of switch from DNA replication to DNA packaging.

Abstract

Replication of a replicative form DNA of bacteriophage phi X174 initiates by rolling-circle synthesis of the viral DNA followed by discontinuous synthesis of the complementary DNA. Gene C protein of phi X174, which is involved in DNA packaging, inhibits the rolling-circle DNA synthesis by binding to the initiation complex in vitro. The gene C protein-associated initiation complex can synthesize and package the viral DNA to produce infectious phage when supplemented with phi X174 gene J protein and the prohead. Multiple rounds of phage synthesis occur without dissociation of the gene C protein from the complex. These results indicate that gene C protein is central in the switch from replication of a replicative form DNA to synthesis and concomitant packaging of viral DNA into phage capsid, which occurs in the late stage of infection.

PMID:
2944602
DOI:
10.1016/0092-8674(86)90370-3
[Indexed for MEDLINE]

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