A novel influenza A virus mitochondrial protein that induces cell death.

Abstract:

:While searching for alternative reading-frame peptides encoded by influenza A virus that are recognized by CD8+ T cells, we found an abundant immunogenic peptide encoded by the +1 reading frame of PB1. This peptide derives from a novel conserved 87-residue protein, PB1-F2, which has several unusual features compared with other influenza gene products in addition to its mode of translation. These include its absence from some animal (particularly swine) influenza virus isolates, variable expression in individual infected cells, rapid proteasome-dependent degradation and mitochondrial localization. Exposure of cells to a synthetic version of PB1-F2 induces apoptosis, and influenza viruses with targeted mutations that interfere with PB1-F2 expression induce less extensive apoptosis in human monocytic cells than those with intact PB1-F2. We propose that PB1-F2 functions to kill host immune cells responding to influenza virus infection.

journal_name

Nat Med

journal_title

Nature medicine

authors

Chen W,Calvo PA,Malide D,Gibbs J,Schubert U,Bacik I,Basta S,O'Neill R,Schickli J,Palese P,Henklein P,Bennink JR,Yewdell JW

doi

10.1038/nm1201-1306

keywords:

subject

Has Abstract

pub_date

2001-12-01 00:00:00

pages

1306-12

issue

12

eissn

1078-8956

issn

1546-170X

pii

nm1201-1306

journal_volume

7

pub_type

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