Acinetobacter phage genome is similar to Sphinx 2.36, the circular DNA copurified with TSE infected particles

Sci Rep. 2013;3:2240. doi: 10.1038/srep02240.


While analyzing plasmids of Acinetobacter sp. DS002 we have detected a circular DNA molecule pTS236, which upon further investigation is identified as the genome of a phage. The phage genome has shown sequence similarity to the recently discovered Sphinx 2.36 DNA sequence co-purified with the Transmissible Spongiform Encephalopathy (TSE) particles isolated from infected brain samples collected from diverse geographical regions. As in Sphinx 2.36, the phage genome also codes for three proteins. One of them codes for RepA and is shown to be involved in replication of pTS236 through rolling circle (RC) mode. The other two translationally coupled ORFs, orf106 and orf96, code for coat proteins of the phage. Although an orf96 homologue was not previously reported in Sphinx 2.36, a closer examination of DNA sequence of Sphinx 2.36 revealed its presence downstream of orf106 homologue. TEM images and infection assays revealed existence of phage AbDs1 in Acinetobacter sp. DS002.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acinetobacter / virology*
  • Bacterial Proteins / chemistry
  • Bacterial Proteins / genetics
  • Bacterial Proteins / metabolism
  • Bacteriophages / genetics*
  • Bacteriophages / ultrastructure
  • Base Sequence
  • Codon, Initiator
  • DNA Replication
  • DNA, Circular*
  • Genome, Viral*
  • Molecular Sequence Data
  • Nucleic Acid Conformation
  • Plasmids / genetics
  • Prion Diseases / metabolism
  • Protein Binding
  • Replication Origin
  • Sequence Alignment
  • Sequence Analysis, DNA


  • Bacterial Proteins
  • Codon, Initiator
  • DNA, Circular

Associated data

  • GENBANK/JN872565