The cell biology of receptor-mediated virus entry

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Abstract

The cell imposes multiple barriers to virus entry. However, viruses exploit fundamental cellular processes to gain entry to cells and deliver their genetic cargo. Virus entry pathways are largely defined by the interactions between virus particles and their receptors at the cell surface. These interactions determine the mechanisms of virus attachment, uptake, intracellular trafficking, and, ultimately, penetration to the cytosol. Elucidating the complex interplay between viruses and their receptors is necessary for a full understanding of how these remarkable agents invade their cellular hosts.

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Angiotensin-converting enzyme 2 is a functional receptor for the SARS coronavirus

Wenhui Li, Michael Moore, Natalya Vasilieva … (2003)

Spike (S) proteins of coronaviruses, including the coronavirus that causes severe acute respiratory syndrome (SARS), associate with cellular receptors to mediate infection of their target cells 1,2 . Here we identify a metallopeptidase, angiotensin-converting enzyme 2 (ACE2) 3,4 , isolated from SARS coronavirus (SARS-CoV)-permissive Vero E6 cells, that efficiently binds the S1 domain of the SARS-CoV S protein. We found that a soluble form of ACE2, but not of the related enzyme ACE1, blocked association of the S1 domain with Vero E6 cells. 293T cells transfected with ACE2, but not those transfected with human immunodeficiency virus-1 receptors, formed multinucleated syncytia with cells expressing S protein. Furthermore, SARS-CoV replicated efficiently on ACE2-transfected but not mock-transfected 293T cells. Finally, anti-ACE2 but not anti-ACE1 antibody blocked viral replication on Vero E6 cells. Together our data indicate that ACE2 is a functional receptor for SARS-CoV. Supplementary information The online version of this article (doi:10.1038/nature02145) contains supplementary material, which is available to authorized users.

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Isolation of a common receptor for Coxsackie B viruses and adenoviruses 2 and 5.

J M Bergelson, J A Cunningham, G Droguett … (1997)

A complementary DNA clone has been isolated that encodes a coxsackievirus and adenovirus receptor (CAR). When transfected with CAR complementary DNA, nonpermissive hamster cells became susceptible to coxsackie B virus attachment and infection. Furthermore, consistent with previous studies demonstrating that adenovirus infection depends on attachment of a viral fiber to the target cell, CAR-transfected hamster cells bound adenovirus in a fiber-dependent fashion and showed a 100-fold increase in susceptibility to virus-mediated gene transfer. Identification of CAR as a receptor for these two unrelated and structurally distinct viral pathogens is important for understanding viral pathogenesis and has implications for therapeutic gene delivery with adenovirus vectors.

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Virus entry by endocytosis.

Jason Mercer, Mario Schelhaas, Ari Helenius (2010)

Although viruses are simple in structure and composition, their interactions with host cells are complex. Merely to gain entry, animal viruses make use of a repertoire of cellular processes that involve hundreds of cellular proteins. Although some viruses have the capacity to penetrate into the cytosol directly through the plasma membrane, most depend on endocytic uptake, vesicular transport through the cytoplasm, and delivery to endosomes and other intracellular organelles. The internalization may involve clathrin-mediated endocytosis (CME), macropinocytosis, caveolar/lipid raft-mediated endocytosis, or a variety of other still poorly characterized mechanisms. This review focuses on the cell biology of virus entry and the different strategies and endocytic mechanisms used by animal viruses.

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Author and article information

Journal

Journal ID (nlm-ta): J Cell Biol

Journal ID (iso-abbrev): J. Cell Biol

Journal ID (hwp): jcb

Title: The Journal of Cell Biology

Publisher: The Rockefeller University Press

ISSN (Print): 0021-9525

ISSN (Electronic): 1540-8140

Publication date (Print): 26 December 2011

Volume: 195

Issue: 7

Pages: 1071-1082

Affiliations

Cell Biology Unit, Medical Research Council Laboratory for Molecular Cell Biology, University College London, London WC1E 6BT, England, UK

Author notes

Correspondence to Joe Grove: j.grove@ 123456ucl.ac.uk

Article

Publisher ID: 201108131

DOI: 10.1083/jcb.201108131

PMC ID: 3246895

PubMed ID: 22123832

SO-VID: 014b1daf-e3ac-49af-8d9f-8c21f88660c1

License:

This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 3.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/3.0/).

History

Date received : 22 August 2011

Date accepted : 19 October 2011

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