Evidence map›Paper›PMID 29717999›Full record

ArticleActa crystallographica. Section F, Structural biology communications2018

Improved protein-crystal identification by using 2,2,2-trichloroethanol as a fluorescence enhancer.

Christian Pichlo, Christine Toelzer, Konrad Chojnacki, Sinan Öcal, Matthias Uthoff, Sabine Ruegenberg, Thomas Hermanns, Magdalena Schacherl, Martin S Denzel, Kay Hofmann and 2 more

Abstract read
In one paragraph

Article in Acta crystallographica. Section F, Structural biology communications, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing 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

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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

2 citing papers in PubMed.

  1. 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

12 authors.

Christian PichloInstitute of Biochemistry, University of Cologne, Zülpicher Strasse 47, 50674 Cologne, Germany.ORCID 0000-0002-3156-5667
Christine ToelzerInstitute of Biochemistry, University of Cologne, Zülpicher Strasse 47, 50674 Cologne, Germany.ORCID 0000-0001-9984-5940
Konrad ChojnackiInstitute of Biochemistry, University of Cologne, Zülpicher Strasse 47, 50674 Cologne, Germany.ORCID 0000-0002-9285-0904
Sinan ÖcalInstitute of Biochemistry, University of Cologne, Zülpicher Strasse 47, 50674 Cologne, Germany.
Matthias UthoffInstitute of Biochemistry, University of Cologne, Zülpicher Strasse 47, 50674 Cologne, Germany.
Sabine RuegenbergMax Planck Institute for Biology of Ageing, Research Institute, Joseph-Stelzmann-Strasse 9b, 50931 Cologne, Germany.
Thomas HermannsInstitute for Genetics, University of Cologne, Zülpicher Strasse 47a, 50674 Cologne, Germany.ORCID 0000-0001-5350-7479
Magdalena SchacherlStructural Dynamics of Proteins, Center of Advanced European Studies and Research, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany.
Martin S DenzelMax Planck Institute for Biology of Ageing, Research Institute, Joseph-Stelzmann-Strasse 9b, 50931 Cologne, Germany.ORCID 0000-0002-5691-3349
Kay HofmannInstitute for Genetics, University of Cologne, Zülpicher Strasse 47a, 50674 Cologne, Germany.
Karsten NiefindInstitute of Biochemistry, University of Cologne, Zülpicher Strasse 47, 50674 Cologne, Germany.ORCID 0000-0002-0183-6315
Ulrich BaumannInstitute of Biochemistry, University of Cologne, Zülpicher Strasse 47, 50674 Cologne, Germany.

Funding

Narodowe Centrum Nauki 2014/13/B/NZ7/02273
6 · The paper itself

Abstract

The identification of initial lead conditions for successful protein crystallization is crucial for structural studies using X-ray crystallography. In order to reduce the number of false-negative conditions, an emerging number of fluorescence-based methods have been developed which allow more efficient identification of protein crystals and help to distinguish them from salt crystals. Detection of the native tryptophan fluorescence of protein crystals is one of the most widely used methods. However, this method can fail owing to the properties of the crystallized protein or the chemical composition of the crystallization trials. Here, a simple, fast and cost-efficient method employing 2,2,2-trichloroethanol (TCE) has been developed. It can be performed with a standard UV-light microscope and can be applied to cases in which detection of native tryptophan fluorescence fails. In four test cases this method had no effect on the diffraction properties of the crystals and no structural changes were observed. Further evidence is provided that TCE can be added to crystallization trials during their preparation, making this method compatible with high-throughput approaches.

Indexed as

Ethylene ChlorohydrinMicroscopy, FluorescenceProtein Structure, SecondaryRecombinant Proteins2,2,2-trichloroethanolEthylene ChlorohydrinRecombinant Proteins2,2,2-trichloroethanolPPEP-1protein-crystal identificationtryptophan fluorescence

Identifiers

PMID29717999
PMCPMC5931144

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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.