Evidence map›Paper›PMID 33514946›Full record

ArticleNature protocols2021

Determination of G-protein-coupled receptor oligomerization by molecular brightness analyses in single cells.

Ali Işbilir, Robert Serfling, Jan Möller, Romy Thomas, Chiara De Faveri, Ulrike Zabel, Marco Scarselli, Annette G Beck-Sickinger, Andreas Bock, Irene Coin and 2 more

Abstract read
PubMed Publisher
In one paragraph

Article in Nature protocols, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
2.4field-weighted citation impact, top 11% of its field
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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 38 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Intensity-Based Estimation of Monomeric Brightness for Fluorescent Proteins.International journal of molecular sciences · 2025
    Article
  5. Article
  6. Review
  7. Review
  8. Review
  9. Article
  10. Article
  11. Recent Advances in Single-Molecule Tracking and Imaging Techniques.Annual review of analytical chemistry (Palo Alto, Calif.) · 2023
    Review
  12. Article
  13. Article
  14. Orthogonal Peptide-Templated Labeling Elucidates Lateral ETChembiochem : a European journal of chemical biology · 2022
    Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
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

12 authors at 4 institutions in 3 countries.

Ali IşbilirMax Delbrück Center for Molecular Medicine, Berlin, Germany.ORCID http://orcid.org/0000-0002-9629-1150
Robert SerflingInstitute of Biochemistry, Faculty of Life Sciences, University of Leipzig, Leipzig, Germany.
Jan MöllerMax Delbrück Center for Molecular Medicine, Berlin, Germany.ORCID http://orcid.org/0000-0001-8429-3784
Romy ThomasMax Delbrück Center for Molecular Medicine, Berlin, Germany.ORCID http://orcid.org/0000-0001-8663-3682
Chiara De FaveriInstitute of Biochemistry, Faculty of Life Sciences, University of Leipzig, Leipzig, Germany.
Ulrike ZabelInstitute of Pharmacology and Toxicology, University of Würzburg, Würzburg, Germany.
Marco ScarselliDepartment of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy.
Annette G Beck-SickingerInstitute of Biochemistry, Faculty of Life Sciences, University of Leipzig, Leipzig, Germany.
Andreas BockMax Delbrück Center for Molecular Medicine, Berlin, Germany.
Irene CoinInstitute of Biochemistry, Faculty of Life Sciences, University of Leipzig, Leipzig, Germany.ORCID http://orcid.org/0000-0002-7722-004X
Martin J LohseMax Delbrück Center for Molecular Medicine, Berlin, Germany. m.lohse@mdc-berlin.de.ORCID http://orcid.org/0000-0002-0599-3510
Paolo AnnibaleMax Delbrück Center for Molecular Medicine, Berlin, Germany. paolo.annibale@mdc-berlin.de.ORCID http://orcid.org/0000-0003-3208-5347
Max Delbrück Center · DELeipzig University · DEUniversity of Pisa · ITUniversity of Würzburg · DE

Funding

Biophysical approaches to investigate the biological significance of GPCR dimersR01DA038882 · NIDA · ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI · PI FILIZOLA, MARTA · 2015 to 2019
$1.7M
NIDA NIH HHS R01 DA038882
6 · The paper itself

Abstract

Oligomerization of membrane proteins has received intense research interest because of their importance in cellular signaling and the large pharmacological and clinical potential this offers. Fluorescence imaging methods are emerging as a valid tool to quantify membrane protein oligomerization at high spatial and temporal resolution. Here, we provide a detailed protocol for an image-based method to determine the number and oligomerization state of fluorescently labeled prototypical G-protein-coupled receptors (GPCRs) on the basis of small out-of-equilibrium fluctuations in fluorescence (i.e., molecular brightness) in single cells. The protocol provides a step-by-step procedure that includes instructions for (i) a flexible labeling strategy for the protein of interest (using fluorescent proteins, small self-labeling tags or bio-orthogonal labeling) and the appropriate controls, (ii) performing temporal and spatial brightness image acquisition on a confocal microscope and (iii) analyzing and interpreting the data, excluding clusters and intensity hot-spots commonly observed in receptor distributions. Although specifically tailored for GPCRs, this protocol can be applied to diverse classes of membrane proteins of interest. The complete protocol can be implemented in 1 month.

Indexed as

FluorescenceHEK293 CellsHumansMembrane ProteinsMicroscopy, ConfocalMicroscopy, FluorescenceOptical ImagingProtein MultimerizationReceptors, G-Protein-CoupledSignal TransductionSingle-Cell AnalysisSpectrometry, FluorescenceMembrane ProteinsReceptors, G-Protein-Coupled

Identifiers

PMID33514946
OpenAlexW3121729579

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.