Evidence map›Paper›PMID 32553128›Full record

ArticleBiophysical journal2020

Determining the Stoichiometry of Small Protein Oligomers Using Steady-State Fluorescence Anisotropy.

Philipp J Heckmeier, Ganesh Agam, Mark G Teese, Maria Hoyer, Ralf Stehle, Don C Lamb, Dieter Langosch

Abstract read
In one paragraph

Article in Biophysical journal, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing 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

14 citing papers in PubMed.

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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

7 authors.

Philipp J HeckmeierCenter for Integrated Protein Science Munich (CIPSM), Lehrstuhl für Chemie der Biopolymere, Technische Universität München, Freising, Germany.
Ganesh AgamPhysical Chemistry, Department of Chemistry, Center for Nano Science (CENS), Center for Integrated Protein Science (CIPSM) and Nanosystems Initiative München (NIM), Ludwig-Maximilians-Universität Munich, Munich, Germany.
Mark G TeeseCenter for Integrated Protein Science Munich (CIPSM), Lehrstuhl für Chemie der Biopolymere, Technische Universität München, Freising, Germany.
Maria HoyerPhysical Chemistry, Department of Chemistry, Center for Nano Science (CENS), Center for Integrated Protein Science (CIPSM) and Nanosystems Initiative München (NIM), Ludwig-Maximilians-Universität Munich, Munich, Germany.
Ralf StehleInstitute of Structural Biology, Helmholtz Zentrum München, Neuherberg, Germany; Center for Integrated Protein Science Munich (CIPSM), Chair Biomolecular NMR Spectroscopy, Department Chemie, Technische Universität München, Garching, Germany.
Don C LambPhysical Chemistry, Department of Chemistry, Center for Nano Science (CENS), Center for Integrated Protein Science (CIPSM) and Nanosystems Initiative München (NIM), Ludwig-Maximilians-Universität Munich, Munich, Germany. Electronic address: d.lamb@lmu.de.
Dieter LangoschCenter for Integrated Protein Science Munich (CIPSM), Lehrstuhl für Chemie der Biopolymere, Technische Universität München, Freising, Germany. Electronic address: langosch@tum.de.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

A large fraction of soluble and membrane-bound proteins exists as non-covalent dimers, trimers, and higher-order oligomers. The experimental determination of the oligomeric state or stoichiometry of proteins remains a nontrivial challenge. In one approach, the protein of interest is genetically fused to green fluorescent protein (GFP). If a fusion protein assembles into a non-covalent oligomeric complex, exciting their GFP moiety with polarized fluorescent light elicits homotypic Förster resonance energy transfer (homo-FRET), in which the emitted radiation is partially depolarized. Fluorescence depolarization is associated with a decrease in fluorescence anisotropy that can be exploited to calculate the oligomeric state. In a classical approach, several parameters obtained through time-resolved and steady-state anisotropy measurements are required for determining the stoichiometry of the oligomers. Here, we examined novel approaches in which time-resolved measurements of reference proteins provide the parameters that can be used to interpret the less expensive steady-state anisotropy data of candidates. In one approach, we find that using average homo-FRET rates (k

Indexed as

Fluorescence Resonance Energy TransferAnisotropyFluorescence PolarizationGreen Fluorescent ProteinsPhotobleachingGreen Fluorescent Proteins

Identifiers

PMID32553128
PMCPMC7335908

What OpenQuestion holds

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Registered trials

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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.