Phikzvirus (taxid:680115)



Non-enveloped, head-tail structure. The capsid that contains contains an inner body is very large, about 145 nm in diameter, with an icosahedral symmetry T=27. The extended tail measures 160 x 35 nm.


Genomes are about 280 kb in size, are circularly permuted and terminally redundant and have a mosaic structure. They contain about 306 genes.


Genes are transcribed by operons.


  • DNA-directed RNA polymerase
  • Virion maturation protease (Peptidase S80)
  • GTPase
  • ribonucleoside-diphosphate reductase
  • ribonuclease H
  • dTMP kinase
  • Dihydrofolate reductase
  • 3'-5' exoribonuclease
  • Thymidylate synthase



  1. Adsorption: the phage attaches to the target cell through its tail fibers.
  2. Ejection of the viral DNA into host cell cytoplasm by contraction of the tail sheath.
  3. Transcription and translation of early genes.
  4. Replication of viral DNA. Transcription and translation of late genes.
  5. Assembly of an empty procapsid and packaging of the genome.
  6. Viral tail fibers assembly and viral tail assembly.
  7. Mature virions are released from the cell by lysis.

Matching UniProtKB/Swiss-Prot entries

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3 entries grouped by strain

3 entries

Pseudomonas phage phiKZ reference strain

EXLYS_BPDPK Peptidoglycan hydrolase gp181 (Gene product 181) (Gp181)
PHUZ_BPDPK Phage tubulin-like protein (PhuZ) (EC 3.6.5.-) (Phage tubulin/FtsZ) (Tubulin-like protein TubZ)
CHMA_BPDPK Chimallin (ChmA) (Phage nucleus enclosure protein) (PhuN) (gene product 54) (gp54)