Abstract
Bacteriophage ZF40 is the only currently available, temperate Myoviridae phage infecting the potato pathogen Pectobacterium carotovorum subsp. carotovorum. Despite its unusual tail morphology, its major tail sheath and tube proteins remained uncharacterized after the initial genome annotation. Using ESI tandem mass-spectrometry, 24 structural proteins of the ZF40 virion were identified, with a sequence coverage ranging between 15.8% and 87.8%. The putative function of 16 proteins could be elucidated based on secondary structure analysis and conservative domain searches. The experimental annotation of 35% of the encoded gene products within the structural region of the genome represents a complete view of the virion structure, which can serve as the basis for future structural analysis as a model phage.
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