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Peptides released from reovirus outer capsid form membrane pores that recruit virus particles
Author(s) -
Ivanovic Tijana,
Agosto Melina A,
Zhang Lan,
Chandran Kartik,
Harrison Stephen C,
Nibert Max L
Publication year - 2008
Publication title -
the embo journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.484
H-Index - 392
eISSN - 1460-2075
pISSN - 0261-4189
DOI - 10.1038/emboj.2008.60
Subject(s) - capsid , membrane , biophysics , biology , myristoylation , cell membrane , microbiology and biotechnology , virus , mutant , biochemistry , virology , gene
Nonenveloped animal viruses must disrupt or perforate a cell membrane during entry. Recent work with reovirus has shown formation of size‐selective pores in RBC membranes in concert with structural changes in capsid protein μ1. Here, we demonstrate that μ1 fragments released from reovirus particles are sufficient for pore formation. Both myristoylated N‐terminal fragment μ1N and C‐terminal fragment ϕ are released from particles. Both also associate with RBC membranes and contribute to pore formation in the absence of particles, but μ1N has the primary and sufficient role. Particles with a mutant form of μ1, unable to release μ1N or form pores, lack the ability to associate with membranes. They are, however, recruited by pores preformed with peptides released from wild‐type particles or with synthetic μ1N. The results provide evidence that docking to membrane pores by virus particles may be a next step in membrane penetration after pore formation by released peptides.