Molecular and physiological analysis of three Pseudomonas aeruginosa phages belonging to the "N4-like viruses".
We present a detailed analysis of the genome architecture, structural proteome and infection-related properties of three Pseudomonas phages, designated LUZ7, LIT1 and PEV2. These podoviruses encapsulate 72.5 to 74.9 kb genomes and lyse their host after 25 min aerobic infection. PEV2 can successfully infect under anaerobic conditions, but its latent period is tripled, the lysis proceeds far slower and the burst size decreases significantly. While the overall genome structure of these phages resembles the well-studied coliphage N4, these Pseudomonas phages encode a cluster of tail genes which displays significant similarity to a Pseudomonasaeruginosa (cryptic) prophage region. Using ESI-MS/MS, these tail proteins were shown to be part of the phage particle, as well as ten other proteins including a giant 370 kDa virion RNA polymerase. These phages are the first described representatives of a novel kind of obligatory lytic P. aeruginosa-infecting phages, belonging to the widespread "N4-like viruses" genus.
Ceyssens
Pieter-Jan
PJ
Division of Gene Technology, Katholieke Universiteit Leuven, Kasteelpark Arenberg, Leuven, B-3001, Belgium.
Brabban
Andrew
A
Rogge
Larissa
L
Lewis
Matthew Spooner
MS
Pickard
Derek
D
Goulding
David
D
Dougan
Gordon
G
Noben
Jean-Paul
JP
Kropinski
Andrew
A
Kutter
Elizabeth
E
Lavigne
Rob
R
D000818:Animals; D015967:Gene Expression Regulation, Viral; D016679:Genome, Viral; D008969:Molecular Sequence Data; D017105:Pseudomonas Phages / Q000145:classification / Q000235:genetics* / Q000502:physiology*; D011550:Pseudomonas aeruginosa / Q000821:virology; D015678:Viral Structural Proteins / Q000235:genetics / Q000378:metabolism
D015678:Viral Structural Proteins