Genome of low-temperature T4-related bacteriophage vB_EcoM-VR7

Arch Virol. 2011 Oct;156(10):1913-6. doi: 10.1007/s00705-011-1084-y. Epub 2011 Aug 10.

Abstract

The complete genome sequence of the T4-related low-temperature Escherichia coli bacteriophage vB_EcoM-VR7 was determined. The genome sequence is 169,285 bp long, with a G+C content of 40.3%. Overall, 95% of the phage genome is coding. It encodes 293 putative protein-encoding open reading frames (ORFs) and tRNA(Met). More than half (59%) of the genomic DNA lacks significant homology with the DNA of T4, but once translated, 72% of the vB_EcoM-VR7 genome (211 ORFs) encodes protein homologues of T4 genes. Overall, 46 vB_EcoM-VR7 ORFs have no homologues in T4 but are derived from other T4-related phages, nine ORFs show similarities to bacterial or non-T4-related phage genes, and 27 ORFs are unique to vB_EcoM-VR7. This phage lacks several T4 enzymes involved in host DNA degradation; however, there is extensive representation of the DNA replication, recombination and repair enzymes as well as the viral capsid and tail structural genes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bacteriophages / classification
  • Bacteriophages / genetics*
  • Bacteriophages / isolation & purification*
  • Base Sequence
  • Escherichia coli / virology*
  • Genome, Viral*
  • Molecular Sequence Data
  • Open Reading Frames
  • Sewage / virology*
  • Temperature
  • Viral Proteins / genetics

Substances

  • Sewage
  • Viral Proteins

Associated data

  • GENBANK/HM563683