2022
DOI: 10.1111/1462-2920.15991
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Filamentous prophage capsid proteins contribute to superinfection exclusion and phage defence in Pseudomonas aeruginosa

Abstract: Summary Filamentous prophages in Pseudomonas aeruginosa PAO1 are converted to superinfective phage virions during biofilm development. Superinfection exclusion is necessary for the development of resistance against superinfective phage virions in host cells. However, the molecular mechanisms underlying the exclusion of superinfective Pf phages are unknown. In this study, we found that filamentous prophage‐encoded structural proteins allow exclusion of superinfective Pf phages by interfering with type IV pilus … Show more

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Cited by 21 publications
(7 citation statements)
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“…The phage adsorption assay we performed as we reported recently with minor modification 53 . Briefly, 2 ml of culture was collected at OD 600 ∼ 1 and mixed with different amounts of phages (10 7 -10 9 PFU/ml) to reach a MOI of 0.01.…”
Section: Methodsmentioning
confidence: 99%
“…The phage adsorption assay we performed as we reported recently with minor modification 53 . Briefly, 2 ml of culture was collected at OD 600 ∼ 1 and mixed with different amounts of phages (10 7 -10 9 PFU/ml) to reach a MOI of 0.01.…”
Section: Methodsmentioning
confidence: 99%
“…T4P repression in these strains could be ascribed to the loss of transcriptional activation, as both Pf4r 31 and PA0715 33 in the L region were recently demonstrated to promote transcription of T4P-essential genes. Additionally, Pf4 minor capsid proteins pVII and pIII also interfered with T4P assembly and contributed to Pf4 superinfection exclusion 34,35 . Furthermore, we examined whether XisF4 had an additional effect on twitching motility, as it was upregulated more than 64-fold in those T4P-defective strains (Fig.…”
Section: Superinfection Of Pseudomonas Lamentous (Pf4) Bacteriophage ...mentioning
confidence: 99%
“…To compete for host cell resources, many phages have evolved superinfection exclusion mechanisms that enable the host’s resistance to repeated infection by other phage. Pf phages in P. aeruginosa can exclude infection of other phages by interfering with the function of type IV pili (T4P), which may reduce the efficacy of phages in treating pseudomonas-associated infections [ 34 ]. Escherichia coli abolishes further infection by bacteriophage T5 via the jamming of TonB-dependent transporters by small phage lipoproteins [ 35 ].…”
Section: Underlying Mechanisms Of Phages In Chronic Liver Diseasesmentioning
confidence: 99%