N4virus

VIRION

Non-enveloped, head-tail structure. The icosahedral capsid is about 70 nm in diameter, with a T=9 icosahedral symmetry . The virion contains about 4 copies of a viral RNA polymerase (vRNAP) .

GENOME

Linear, dsDNA genome of about 70 kb encoding 72 genes.

GENE EXPRESSION

REPLICATION

CYTOPLASMIC

  1. Adsorption: the phage attaches to the target cell through its tail fibers.
  2. Ejection of the viral DNA and the viral RNA polymerase (vRNAP) into host cell cytoplasm .
  3. Transcription by the vRNAP of the phage early genes.
  4. Replication of genomic DNA. Transcription (by the host RNAP) 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

7 entries grouped by protein (browse by keywords)

1 entry

Major capsid protein (Gene product 56) (gp56) (Major head protein)

CAPSD_BPN4
Enterobacteria phage N4 (Bacteriophage N4) reference strain

1 entry

Gene product 8 (gp8)

GP8_BPN4
Enterobacteria phage N4 (Bacteriophage N4) reference strain

1 entry

Non-contractile tail sheath (Gene product 65) (Gp65)

NCTSP_BPN4
Enterobacteria phage N4 (Bacteriophage N4) reference strain

1 entry

Probable portal protein (94 kDa protein) (Gene product 59) (gp59) (Head-to-tail connector)

PORTL_BPN4
Enterobacteria phage N4 (Bacteriophage N4) reference strain

1 entry

Virion DNA-directed RNA polymerase (vRNAP) (EC 2.7.7.6) (Gene product 50) (gp50)

RPOLV_BPN4
Enterobacteria phage N4 (Bacteriophage N4) reference strain

1 entry

Uncharacterized protein Gp1 (12 kDa protein in genome left end) (ORF 1)

YLF1_BPN4
Enterobacteria phage N4 (Bacteriophage N4) reference strain

1 entry

Uncharacterized protein Gp2 (ORF 2)

YLF2_BPN4
Enterobacteria phage N4 (Bacteriophage N4) reference strain