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J. Virol., Oct 1996, 6576-6588, Vol 70, No. 10
A Schlegel, TH Giddings Jr, MS Ladinsky and K Kirkegaard
Poliovirus RNA replicative complexes are associated with cytoplasmic
membranous structures that accumulate during viral infection. These
membranes were immunoisolated by using a monoclonal antibody against the
viral nonstructural protein 2C. Biochemical analysis of the isolated
membranes revealed that several organelles of the host cell (lysosomes,
trans-Golgi stack and trans-Golgi network, and endoplasmic reticulum)
contributed to the virus-induced membranous structures. Electron microscopy
of infected cells preserved by high-pressure freezing revealed that the
virus-induced membranes contain double lipid bilayers that surround
apparently cytosolic material. Immunolabeling experiments showed that
poliovirus proteins 2C and 3D were localized to the same membranes as the
cellular markers tested. The morphological and biochemical data are
consistent with the hypothesis that autophagy or a similar host process is
involved in the formation of the poliovirus-induced membranes.
Copyright © 1996, American Society for Microbiology
Cellular origin and ultrastructure of membranes induced during poliovirus infection
Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder 80309, USA.
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