Evidence map›Paper›PMID 29653838›Full record

ArticleBiophysical journal2018

A Multicolor Split-Fluorescent Protein Approach to Visualize Listeria Protein Secretion in Infection.

Dilara Batan, Esther Braselmann, Michael Minson, Dieu My Thanh Nguyen, Pascale Cossart, Amy E Palmer

Open access · bronzeAbstract read
In one paragraph

Article in Biophysical journal, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
2.0field-weighted citation impact, top 16% 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

7 citing papers in PubMed, 13 citations in OpenAlex.

  1. Experimental Approaches to Visualize Effector Protein Translocation During Host-Pathogen Interactions.BioEssays : news and reviews in molecular, cellular and developmental biology · 2025
    Review
  2. CRISPR-Cas9-Mediated Knock-In Approach to Insert the GFPMethods in molecular biology (Clifton, N.J.) · 2023
    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

6 authors at 2 institutions in 2 countries.

Dilara BatanDepartment of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado.
Esther BraselmannDepartment of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado; BioFrontiers Institute, University of Colorado, Boulder, Colorado.
Michael MinsonDepartment of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado; BioFrontiers Institute, University of Colorado, Boulder, Colorado.
Dieu My Thanh NguyenBioFrontiers Institute, University of Colorado, Boulder, Colorado.
Pascale CossartUnité des Interactions Bactéries-Cellules, Département de Biologie Cellulaire et Infection, Institut Pasteur, Paris, France; Inserm U604, Paris, France; French National Institute for Agricultural Research, Unité Sous-Contrat 2020, Paris, France.
Amy E PalmerDepartment of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado; BioFrontiers Institute, University of Colorado, Boulder, Colorado. Electronic address: amy.palmer@colorado.edu.
University of Colorado Boulder · USInserm · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Listeria monocytogenes is an intracellular food-borne pathogen that has evolved to enter mammalian host cells, survive within them, spread from cell to cell, and disseminate throughout the body. A series of secreted virulence proteins from Listeria are responsible for manipulation of host-cell defense mechanisms and adaptation to the intracellular lifestyle. Identifying when and where these virulence proteins are located in live cells over the course of Listeria infection can provide valuable information on the roles these proteins play in defining the host-pathogen interface. These dynamics and protein levels may vary from cell to cell, as bacterial infection is a heterogeneous process both temporally and spatially. No assay to visualize virulence proteins over time in infection with Listeria or other Gram-positive bacteria has been developed. Therefore, we adapted a live, long-term tagging system to visualize a model Listeria protein by fluorescence microscopy on a single-cell level in infection. This system leverages split-fluorescent proteins, in which the last strand of a fluorescent protein (a 16-amino-acid peptide) is genetically fused to the virulence protein of interest. The remainder of the fluorescent protein is produced in the mammalian host cell. Both individual components are nonfluorescent and will bind together and reconstitute fluorescence upon virulence-protein secretion into the host cell. We demonstrate accumulation and distribution within the host cell of the model virulence protein InlC in infection over time. A modular expression platform for InlC visualization was developed. We visualized InlC by tagging it with red and green split-fluorescent proteins and compared usage of a strong constitutive promoter versus the endogenous promoter for InlC production. This split-fluorescent protein approach is versatile and may be used to investigate other Listeria virulence proteins for unique mechanistic insights in infection progression.

Indexed as

Bacterial ProteinsHeLa CellsHumansListeria monocytogenesLuminescent ProteinsModels, MolecularMolecular ImagingProtein ConformationBacterial ProteinsLuminescent Proteins

Identifiers

PMID29653838
PMCPMC6050711
OpenAlexW2796583255

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.