Evidence map›Paper›PMID 25016018›Full record

ArticleThe Journal of biological chemistry2014

Differential regulation of endosomal GPCR/β-arrestin complexes and trafficking by MAPK.

Etienne Khoury, Ljiljana Nikolajev, May Simaan, Yoon Namkung, Stéphane A Laporte

Abstract read
In one paragraph

Article in The Journal of biological chemistry, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

25 citing papers in PubMed.

  1. Review
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  9. Review
  10. Biochemical and physiological insights into TRH receptor-mediated signaling.Frontiers in cell and developmental biology · 2022
    Review
  11. Article
  12. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Etienne KhouryFrom the Departments of Medicine.
Ljiljana NikolajevPharmacology and Therapeutics, and.
May SimaanFrom the Departments of Medicine.
Yoon NamkungFrom the Departments of Medicine.
Stéphane A LaporteFrom the Departments of Medicine, Pharmacology and Therapeutics, and Anatomy and Cell Biology, McGill University Health Center Research Institute, McGill University, Strathcona Anatomy & Dentistry Bldg., Quebec H3A 2B2, Canada stephane.laporte@mcgill.ca.

Funding

Canadian Institutes of Health Research MOP-74603
6 · The paper itself

Abstract

β-Arrestins are signaling adaptors that bind to agonist-occupied G protein-coupled receptors (GPCRs) and target them for endocytosis; however, the mechanisms regulating receptor/β-arrestin complexes and trafficking in endosomes, remain ill defined. Here we show, in live cells, differential dynamic regulation of endosomal bradykinin B2 receptor (B2R) complexes with either β-arrestin-1 or -2. We find a novel role for MAPK in the B2R/β-arrestin-2 complex formation, receptor trafficking and signaling mediated by an ERK1/2 regulatory motif in the hinge domain of the rat β-arrestin-2 (PET(178)P), but not rat β-arrestin-1 (PER(177)P). While the ERK1/2 regulatory motif is conserved between rat and mouse β-arrestin-2, it is surprisingly not conserved in human β-arrestin-2 (PEK(178)P). However, mutation of lysine 178 to threonine is sufficient to confer MAPK sensitivity to the human β-arrestin-2. Furthermore, substitution for a phosphomimetic residue in both the rat and the human β-arrestin-2 (T/K178D) significantly stabilizes B2R/β-arrestin complexes in endosomes, delays receptor recycling to the plasma membrane and maintains intracellular MAPK signaling. Similarly, the endosomal trafficking of β2-adrenergic, angiotensin II type 1 and vasopressin V2 receptors was altered by the β-arrestin-2 T178D mutant. Our findings unveil a novel subtype specific mode of MAPK-dependent regulation of β-arrestins in intracellular trafficking and signaling of GPCRs, and suggest differential endosomal receptor/β-arrestin-2 signaling roles among species.

Indexed as

Amino Acid SequenceAnimalsArrestinsbeta-Arrestin 1beta-Arrestin 2beta-ArrestinsChlorocebus aethiopsCOS CellsEndocytosisEndosomesHEK293 CellsHumansMitogen-Activated Protein KinasesMolecular Sequence DataProtein TransportRatsARRB1 protein, humanArrb1 protein, mouseArrb1 protein, ratARRB2 protein, humanArrb2 protein, mouseArrb2 protein, ratArrestinsbeta-Arrestin 1beta-Arrestin 2beta-ArrestinsMitogen-Activated Protein KinasesReceptors, G-Protein-CoupledArrestinBradykinin B2 ReceptorCell SignalingG Protein-coupled Receptor (GPCR)Mitogen-activated Protein Kinase (MAPK)Trafficking

Identifiers

PMID25016018
PMCPMC4156072

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.