Potent Anti-HIV Chemokine Analogs Direct Post-Endocytic Sorting of CCR5

PLoS One. 2015 Apr 29;10(4):e0125396. doi: 10.1371/journal.pone.0125396. eCollection 2015.

Abstract

G protein-coupled receptors (GPCRs) are desensitized and internalized following activation. They are then subjected to post-endocytic sorting (degradation, slow recycling or fast recycling). The majority of research on post-endocytic sorting has focused on the role of sequence-encoded address structures on receptors. This study focuses on trafficking of CCR5, a GPCR chemokine receptor and the principal entry coreceptor for HIV. Using Chinese Hamster Ovary cells stably expressing CCR5 we show that two different anti-HIV chemokine analogs, PSC-RANTES and 5P14-RANTES, direct receptor trafficking into two distinct subcellular compartments: the trans-Golgi network and the endosome recycling compartment, respectively. Our results indicate that a likely mechanism for ligand-directed sorting of CCR5 involves capacity of the chemokine analogs to elicit the formation of durable complexes of CCR5 and arrestin2 (beta-arrestin-1), with PSC-RANTES eliciting durable association in contrast to 5P14-RANTES, which elicits only transient association.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Arrestins / genetics
  • Arrestins / metabolism*
  • CHO Cells
  • Chemokine CCL5 / administration & dosage
  • Chemokines / genetics
  • Chemokines / metabolism*
  • Cricetinae
  • Cricetulus
  • Endosomes / genetics
  • Endosomes / metabolism
  • HIV Infections / genetics*
  • HIV Infections / metabolism
  • HIV Infections / pathology
  • Humans
  • Ligands
  • Receptors, CCR5 / biosynthesis*
  • Receptors, CCR5 / genetics
  • beta-Arrestin 1
  • beta-Arrestins
  • trans-Golgi Network / genetics
  • trans-Golgi Network / metabolism

Substances

  • ARRB1 protein, human
  • Arrestins
  • Chemokine CCL5
  • Chemokines
  • Ligands
  • Receptors, CCR5
  • beta-Arrestin 1
  • beta-Arrestins