Evidence map›Paper›PMID 23470778›Full record

ArticleProtein expression and purification2013

Application of HaloTag technology to expression and purification of cannabinoid receptor CB2.

Silvia Locatelli-Hoops, Fangmin C Sheen, Lioudmila Zoubak, Klaus Gawrisch, Alexei A Yeliseev

Abstract read
In one paragraph

Article in Protein expression and purification, 2013. 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
3.5field-weighted citation impact, top 9% 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

14 citing papers in PubMed, 27 citations in OpenAlex.

  1. Article
  2. [Establishment and evaluation of haloalkane dehalogenase taggedSe pu = Chinese journal of chromatography · 2024
    Article
  3. Special issue for Klaus Gawrisch.Biophysical journal · 2023
    Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Nanomechanics of HaloTag tethers.Journal of the American Chemical Society · 2013
    Article
  14. Review
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 at 3 institutions in 1 country.

Silvia Locatelli-HoopsLaboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD 20892, USA.
Fangmin C Sheen
Lioudmila Zoubak
Klaus Gawrisch
Alexei A Yeliseev
National Institutes of Health · USNational Institute on Alcohol Abuse and Alcoholism · USPromega (United States) · US

Funding

NMR Investigations Of Cell Membrane StructureZIAAA000003 · NIAAA · NATIONAL INSTITUTE ON ALCOHOL ABUSE AND ALCOHOLISM · PI GAWRISCH, KLAUS · 2009 to 2020
$23.2M
Intramural NIH HHS Z99 AA999999
6 · The paper itself

Abstract

Expression of milligram quantities of functional, stable G protein-coupled receptors (GPCR) for high-resolution structural studies remains a challenging task. The goal of this work was to evaluate the usefulness of the HaloTag system (Promega) for expression and purification of the human cannabinoid receptor CB(2), an important target for development of drugs for treatment of immune disorders, inflammation, and pain. Here we investigated expression in Escherichia coli cells of the integral membrane receptor CB(2) as a fusion with the 34 kDa HaloTag at N- or C-terminal location, either in the presence or in the absence of the N-terminal maltose-binding protein (MBP). The CB(2) was flanked at both ends by the tobacco etch virus (TEV) protease cleavage sites to allow for subsequent removal of expression partners. Expression by induction with either IPTG (in E. coli BL21(DE3) cell cultures) or by auto-induction (in E. coli KRX cells) were compared. While the N-terminal location of the HaloTag resulted in high levels of expression of the fusion CB(2), the recombinant receptor was not functional. However, when the HaloTag was placed in the C-terminal location, a fully active receptor was produced irrespective of induction method or bacterial strain used. For purification, the fusion protein was captured onto HaloLink resin in the presence of detergents. Treatment with specific TEV protease released the CB(2) upon washing. To our knowledge, this study represents the first example of expression, surface immobilization and purification of a functional GPCR using HaloTag technology.

Indexed as

DetergentsEscherichia coliHumansImmune System DiseasesInflammationMaltose-Binding ProteinsReceptor, Cannabinoid, CB2Recombinant Fusion ProteinsDetergentsMaltose-Binding ProteinsReceptor, Cannabinoid, CB2Recombinant Fusion Proteins

Identifiers

PMID23470778
PMCPMC3627748
OpenAlexW2041138601

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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.