An unusually high substitution rate in transplant-associated BK polyomavirus in vivo is further concentrated in HLA-C-bound viral peptides.
PLoS Pathog
; 14(10): e1007368, 2018 10.
Article
in En
| MEDLINE
| ID: mdl-30335851
ABSTRACT
Infection with human BK polyomavirus, a small double-stranded DNA virus, potentially results in severe complications in immunocompromised patients. Here, we describe the in vivo variability and evolution of the BK polyomavirus by deep sequencing. Our data reveal the highest genomic evolutionary rate described in double-stranded DNA viruses, i.e., 10(-3)-10(-5) substitutions per nucleotide site per year. High mutation rates in viruses allow their escape from immune surveillance and adaptation to new hosts. By combining mutational landscapes across viral genomes with in silico prediction of viral peptides, we demonstrate the presence of significantly more coding substitutions within predicted cognate HLA-C-bound viral peptides than outside. This finding suggests a role for HLA-C in antiviral immunity, perhaps through the action of killer cell immunoglobulin-like receptors. The present study provides a comprehensive view of viral evolution and immune escape in a DNA virus.
Full text:
1
Database:
MEDLINE
Main subject:
Peptide Fragments
/
HLA-C Antigens
/
Organ Transplantation
/
BK Virus
/
Polyomavirus Infections
/
Mutation
Type of study:
Prognostic_studies
/
Risk_factors_studies
Limits:
Humans
Language:
En
Journal:
PLoS Pathog
Year:
2018
Type:
Article
Affiliation country:
France