JCVI: Structural Proteins of Enterococcus faecalis Bacteriophage ϕEf11.
 
 
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Citation

Stevens RH, Zhang H, Hsiao C, Kachlany S, Tinoco EM, Depew J, Fouts DE

Structural Proteins of Enterococcus faecalis Bacteriophage ϕEf11.

Bacteriophage. 2016 Jan 01; 6: e1251381.

External Citation

Abstract

ϕEf11, a temperate Siphoviridae bacteriophage, was isolated by induction from a root canal isolate of Enterococcus faecalis. Sequence analysis suggested that the ϕEf11 genome included a contiguous 8 gene module whose function was related to head structure assembly and another module of 10 contiguous genes whose products were responsible for tail structure assembly. SDS-PAGE analysis of virions of a ϕEf11 derivative revealed 11 well-resolved protein bands. To unify the deduced functional gene assignments emanating from the DNA sequence data, with the structural protein analysis of the purified virus, 6 of the SDS-PAGE bands were subjected to mass spectrometry analysis. 5 of the 6 protein bands analyzed by mass spectrometry displayed identical amino acid sequences to those predicted to be specified by 4 of the ORFs identified in the ϕEf11 genome. These included: ORF8 (predicted scaffold protein), ORF10 (predicted major head protein), ORF15 (predicted major tail protein), and ORF23 (presumptive antireceptor).