The Satellite Phage P4 – TheBacteriophags.org

The Satellite Phage P4

by Gianni Dehò and Daniela Ghisotti

Dipartimento di Genetica e di Biologia dei Microrganismi
Universita degli Studi di Milano
Via Celoria 26, 20133 Milan, Italy

Figure 26-1:	Structure and morphogenesis of satellite bacteriophage P4 and its helper P2 virions. (tif)
Figure 26-2:	P4 life cycle. (tif)
Figure 26-3:	Physical and genetic map of P4 (panel A) and P4 immunity region (panel B). (tif)
Figure 26-4:	The essential elements for P4 replication... (tif)
Figure 26-4A:	...Functional domains of the P4 a protein. (tif)
Figure 26-4B:	...Replicon oriI and oriII. (tif)
Figure 26-4C:	...The minimal ori1 sequence and the two direct repeats of crr (pdf file).
Figure 26-5:	A model for P4 replication. (tif)
Figure 26-6:	Predicted secondary structure of the CI RNA and possible interactions in the leader transcript of the immunity region... (tif)
Figure 26-6A:	...Computer predicted structure of the CI RNA. (tif)
Figure 26-6B:	...Predicted secondary structures of the P_LE-t₁ transcript. (tif)
Figure 26-6C:	...Possible interactions between the CI RNA and the SeqA and SeqC targets in the leader region. (tif)
Figure 26-7:	Regulatory loops controlling expression of P4 and P2 late genes. (tif)
Table 26-1:	Bacteriophage P4 genes and functions (pdf file).
Bibliography:	References cited by chapter (pdf file).