Complete genomic nucleotide sequence of the temperate bacteriophage Aa Phi 23 of Actinobacillus actinomycetemcomitans.

Journal Article (Journal Article)

The entire double-stranded DNA genome of the Actinobacillus actinomycetemcomitans bacteriophage Aa Phi 23 was sequenced. Linear DNA contained in the phage particles is circularly permuted and terminally redundant. Therefore, the physical map of the phage genome is circular. Its size is 43,033 bp with an overall molar G+C content of 42.5 mol%. Sixty-six potential open reading frames (ORFs) were identified, including an ORF resulting from a translational frameshift. A putative function could be assigned to 23 of them. Twenty-three other ORFs share homologies only with hypothetical proteins present in several bacteria or bacteriophages, and 20 ORFs seem to be specific for phage Aa Phi 23. The organization of the phage genome and several genetic functions share extensive similarities to that of the lambdoid phages. However, Aa Phi 23 encodes a DNA adenine methylase, and the DNA packaging strategy is more closely related to the P22 system. The attachment sites of Aa Phi 23 (attP) and several A. actinomycetemcomitans hosts (attB) are 49 bp long.

Full Text

Duke Authors

Cited Authors

  • Resch, G; Kulik, EM; Dietrich, FS; Meyer, J

Published Date

  • August 2004

Published In

Volume / Issue

  • 186 / 16

Start / End Page

  • 5523 - 5528

PubMed ID

  • 15292156

Pubmed Central ID

  • PMC490939

International Standard Serial Number (ISSN)

  • 0021-9193

Digital Object Identifier (DOI)

  • 10.1128/JB.186.16.5523-5528.2004


  • eng

Conference Location

  • United States