Convergent evolution in the mechanisms of ACBD3 recruitment to picornavirus replication sites

PLoS Pathog. 2019 Aug 5;15(8):e1007962. doi: 10.1371/journal.ppat.1007962. eCollection 2019 Aug.

Abstract

Enteroviruses, members of the family of picornaviruses, are the most common viral infectious agents in humans causing a broad spectrum of diseases ranging from mild respiratory illnesses to life-threatening infections. To efficiently replicate within the host cell, enteroviruses hijack several host factors, such as ACBD3. ACBD3 facilitates replication of various enterovirus species, however, structural determinants of ACBD3 recruitment to the viral replication sites are poorly understood. Here, we present a structural characterization of the interaction between ACBD3 and the non-structural 3A proteins of four representative enteroviruses (poliovirus, enterovirus A71, enterovirus D68, and rhinovirus B14). In addition, we describe the details of the 3A-3A interaction causing the assembly of the ACBD3-3A heterotetramers and the interaction between the ACBD3-3A complex and the lipid bilayer. Using structure-guided identification of the point mutations disrupting these interactions, we demonstrate their roles in the intracellular localization of these proteins, recruitment of downstream effectors of ACBD3, and facilitation of enterovirus replication. These structures uncovered a striking convergence in the mechanisms of how enteroviruses and kobuviruses, members of a distinct group of picornaviruses that also rely on ACBD3, recruit ACBD3 and its downstream effectors to the sites of viral replication.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adaptor Proteins, Signal Transducing / chemistry
  • Adaptor Proteins, Signal Transducing / genetics
  • Adaptor Proteins, Signal Transducing / metabolism*
  • Amino Acid Sequence
  • Crystallization
  • Crystallography, X-Ray
  • HEK293 Cells
  • Host-Pathogen Interactions*
  • Humans
  • Membrane Proteins / chemistry
  • Membrane Proteins / genetics
  • Membrane Proteins / metabolism*
  • Models, Molecular
  • Mutation
  • Phosphotransferases (Alcohol Group Acceptor) / genetics
  • Phosphotransferases (Alcohol Group Acceptor) / metabolism*
  • Picornaviridae / physiology*
  • Protein Binding
  • Protein Conformation
  • Sequence Homology
  • Viral Proteins / chemistry
  • Viral Proteins / genetics
  • Viral Proteins / metabolism*
  • Virus Replication*

Substances

  • ACBD3 protein, human
  • Adaptor Proteins, Signal Transducing
  • Membrane Proteins
  • Viral Proteins
  • Phosphotransferases (Alcohol Group Acceptor)

Grants and funding

The project was supported by the Czech Science Foundation (http://www.gacr.cz, grant number 17-07058Y, to MK), Academy of Sciences of the Czech Republic (http://www.avcr.cz, RVO: 61388963), European Regional Development Fund (https://ec.europa.eu/regional_policy/en/funding/erdf/, ERDF/ESF project "Chemical biology for drugging undruggable targets - ChemBioDrug", number CZ.02.1.01/0.0/0.0/16_019/0000729), National Science Centre, Poland (http://ncn.gov.pl, grant number 2016/21/B/NZ1/00006, to BR), Netherlands Organisation for Scientific Research (https://www.nwo.nl, NWO-ECHO-711.017.002 to FJMvK and JRPMS, NWO-VICI-91812628 to FJMvK), and by the European Union (https://ec.europa.eu/programmes/horizon2020/en/h2020-section/marie-sklodowska-curie-actions, Horizon 2020 Marie Skłodowska-Curie ETN ‘ANTIVIRALS’, grant agreement number 642434 to FJMvK). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.