The Golgi protein ACBD3 facilitates Enterovirus 71 replication by interacting with 3A

Sci Rep. 2017 Mar 17:7:44592. doi: 10.1038/srep44592.

Abstract

Enterovirus 71 (EV71) is a human pathogen that causes hand, foot, mouth disease and neurological complications. Although EV71, as well as other enteroviruses, initiates a remodeling of intracellular membrane for genomic replication, the regulatory mechanism remains elusive. By screening human cDNA library, we uncover that the Golgi resident protein acyl-coenzyme A binding domain-containing 3 (ACBD3) serves as a target of the 3A protein of EV71. This interaction occurs in cells expressing 3A or infected with EV71. Genetic inhibition or deletion of ACBD3 drastically impairs viral RNA replication and plaque formation. Such defects are corrected upon restoration of ACBD3. In infected cells, EV71 3A redirects ACBD3, to the replication sites. I44A or H54Y substitution in 3A interrupts the binding to ACBD3. As such, viral replication is impeded. These results reveal a mechanism of EV71 replication that involves host ACBD3 for viral replication.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • ADP-Ribosylation Factor 1 / metabolism
  • Adaptor Proteins, Signal Transducing / metabolism*
  • Amino Acid Sequence
  • Amino Acids / metabolism
  • Enterovirus A, Human / genetics
  • Enterovirus A, Human / physiology*
  • Genome, Viral
  • Golgi Apparatus / metabolism*
  • Guanine Nucleotide Exchange Factors / metabolism
  • HeLa Cells
  • Humans
  • Membrane Proteins / metabolism*
  • Protein Binding
  • Protein Transport
  • Viral Proteins / chemistry
  • Viral Proteins / metabolism*
  • Virus Replication*

Substances

  • ACBD3 protein, human
  • Adaptor Proteins, Signal Transducing
  • Amino Acids
  • GBF1 protein, human
  • Guanine Nucleotide Exchange Factors
  • Membrane Proteins
  • Viral Proteins
  • ADP-Ribosylation Factor 1