Evidence map›Paper›PMID 29964047›Full record

ArticleJournal of molecular biology2018

Protein Engineering Reveals Mechanisms of Functional Amyloid Formation in Pseudomonas aeruginosa Biofilms.

Alissa Bleem, Gunna Christiansen, Daniel J Madsen, Hans Maric, Kristian Strømgaard, James D Bryers, Valerie Daggett, Rikke L Meyer, Daniel E Otzen

Abstract read
In one paragraph

Article in Journal of molecular biology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing 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

22 citing papers in PubMed.

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  18. Journal of diabetes research · 2020
    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

9 authors.

Alissa BleemDepartment of Bioengineering, University of Washington, Seattle, WA 98195, USA.
Gunna ChristiansenDepartment of Biomedicine-Medical Microbiology and Immunology, Aarhus University, 8000 Aarhus C, Denmark.
Daniel J MadsenInterdisciplinary Nanoscience Center (iNANO), Department of Molecular Biology and Genetics, Aarhus University, 8000 Aarhus C, Denmark.
Hans MaricDepartment of Drug Design and Pharmacology, University of Copenhagen, 2100 Copenhagen Ø, Denmark.
Kristian StrømgaardDepartment of Drug Design and Pharmacology, University of Copenhagen, 2100 Copenhagen Ø, Denmark.
James D BryersDepartment of Bioengineering, University of Washington, Seattle, WA 98195, USA.
Valerie DaggettDepartment of Bioengineering, University of Washington, Seattle, WA 98195, USA.
Rikke L MeyerInterdisciplinary Nanoscience Center (iNANO), Department of Molecular Biology and Genetics, Aarhus University, 8000 Aarhus C, Denmark.
Daniel E OtzenInterdisciplinary Nanoscience Center (iNANO), Department of Molecular Biology and Genetics, Aarhus University, 8000 Aarhus C, Denmark. Electronic address: dao@inano.au.dk.

Funding

Anti-infective Biomaterials that Enhance Innate ImmunityR21AI132355 · NIAID · UNIVERSITY OF WASHINGTON · PI BRYERS, JAMES D. · 2017 to 2018
$401k
NIAID NIH HHS R21 AI132355
6 · The paper itself

Abstract

Amyloids are typically associated with neurodegenerative diseases, but recent research demonstrates that several bacteria utilize functional amyloid fibrils to fortify the biofilm extracellular matrix and thereby resist antibiotic treatments. In Pseudomonas aeruginosa, these fibrils are composed predominantly of FapC, a protein with high-sequence conservation among the genera. Previous studies established FapC as the major amyloid subunit, but its mechanism of fibril formation in P. aeruginosa remained largely unexplored. Here, we examine the FapC sequence in greater detail through a combination of bioinformatics and protein engineering, and we identify specific motifs that are implicated in amyloid formation. Sequence regions of high evolutionary conservation tend to coincide with regions of high amyloid propensity, and mutation of amyloidogenic motifs to a designed, non-amyloidogenic motif suppresses fibril formation in a pH-dependent manner. We establish the particular significance of the third repeat motif in promoting fibril formation and also demonstrate emergence of soluble oligomer species early in the aggregation pathway. The insights reported here expand our understanding of the mechanism of amyloid polymerization in P. aeruginosa, laying the foundation for development of new amyloid inhibitors to combat recalcitrant biofilm infections.

Indexed as

BiofilmsProtein EngineeringAmino Acid SequenceAmyloidAmyloidogenic ProteinsBacterial ProteinsConserved SequenceDisulfidesExtracellular MatrixHydrogen-Ion ConcentrationKineticsProtein AggregatesProtein BindingProtein MultimerizationPseudomonas aeruginosaAmyloidAmyloidogenic ProteinsBacterial ProteinsDisulfidesProtein Aggregatesbacterial amyloidextracellular matrixpeptide microarrayprotein aggregationprotein sequence analysis

Identifiers

PMID29964047
PMCPMC6178955

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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.