Evidence map›Paper›PMID 25833378›Full record

ArticleOpen biology2015

Increased efficiency of Campylobacter jejuni N-oligosaccharyltransferase PglB by structure-guided engineering.

Julian Ihssen, Jürgen Haas, Michael Kowarik, Luzia Wiesli, Michael Wacker, Torsten Schwede, Linda Thöny-Meyer

Open access · goldAbstract read
In one paragraph

Article in Open biology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
9.0field-weighted citation impact, top 2% 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

25 citing papers in PubMed, 70 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Production of Vaccines Using Biological Conjugation.Methods in molecular biology (Clifton, N.J.) · 2022
    Article
  8. Article
  9. Review
  10. Review
  11. Bacterial Glycoengineering as a Biosynthetic Route to Customized Glycomolecules.Advances in biochemical engineering/biotechnology · 2021
    Article
  12. Interplay of Carbohydrate and Carrier in Antibacterial Glycoconjugate Vaccines.Advances in biochemical engineering/biotechnology · 2021
    Article
  13. Cell-free systems for accelerating glycoprotein expression and biomanufacturing.Journal of industrial microbiology & biotechnology · 2020
    Review
  14. Article
  15. Review
  16. Review
  17. Article
  18. Review
  19. Article
  20. 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

7 authors at 3 institutions in 1 country.

Julian IhssenLaboratory for Biointerfaces, Empa, Swiss Federal Laboratories for Materials Science and Technology, St Gallen 9014, Switzerland julian.ihssen@empa.ch.
Jürgen HaasBiozentrum, University of Basel, Klingelbergstrasse 50/70, Basel 4056, Switzerland SIB Swiss Institute of Bioinformatics, Klingelbergstrasse 50/70, Basel 4056, Switzerland.
Michael KowarikGlycoVaxyn AG, Schlieren 8952, Switzerland.
Luzia WiesliLaboratory for Biointerfaces, Empa, Swiss Federal Laboratories for Materials Science and Technology, St Gallen 9014, Switzerland.
Michael WackerGlycoVaxyn AG, Schlieren 8952, Switzerland.
Torsten SchwedeBiozentrum, University of Basel, Klingelbergstrasse 50/70, Basel 4056, Switzerland SIB Swiss Institute of Bioinformatics, Klingelbergstrasse 50/70, Basel 4056, Switzerland.
Linda Thöny-MeyerLaboratory for Biointerfaces, Empa, Swiss Federal Laboratories for Materials Science and Technology, St Gallen 9014, Switzerland.
Swiss Federal Laboratories for Materials Science and Technology · CHSIB Swiss Institute of Bioinformatics · CHUniversity of Basel · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Conjugate vaccines belong to the most efficient preventive measures against life-threatening bacterial infections. Functional expression of N-oligosaccharyltransferase (N-OST) PglB of Campylobacter jejuni in Escherichia coli enables a simplified production of glycoconjugate vaccines in prokaryotic cells. Polysaccharide antigens of pathogenic bacteria can be covalently coupled to immunogenic acceptor proteins bearing engineered glycosylation sites. Transfer efficiency of PglBCj is low for certain heterologous polysaccharide substrates. In this study, we increased glycosylation rates for Salmonella enterica sv. Typhimurium LT2 O antigen (which lacks N-acetyl sugars) and Staphylococcus aureus CP5 polysaccharides by structure-guided engineering of PglB. A three-dimensional homology model of membrane-associated PglBCj, docked to the natural C. jejuni N-glycan attached to the acceptor peptide, was used to identify potential sugar-interacting residues as targets for mutagenesis. Saturation mutagenesis of an active site residue yielded the enhancing mutation N311V, which facilitated fivefold to 11-fold increased in vivo glycosylation rates as determined by glycoprotein-specific ELISA. Further rounds of in vitro evolution led to a triple mutant S80R-Q287P-N311V enabling a yield improvement of S. enterica LT2 glycoconjugates by a factor of 16. Our results demonstrate that bacterial N-OST can be tailored to specific polysaccharide substrates by structure-guided protein engineering.

Indexed as

Amino Acid SequenceBacterial ProteinsBinding SitesBlotting, WesternCampylobacter jejuniCarbohydrate ConformationComputer SimulationEnzyme-Linked Immunosorbent AssayGlycosylationHexosyltransferasesMembrane ProteinsModels, MolecularMolecular Sequence DataMutagenesisMutationOligosaccharidesBacterial Proteinsdolichyl-diphosphooligosaccharide - protein glycotransferaseHexosyltransferasesMembrane ProteinsOligosaccharidesPolysaccharidesCampylobacter jejunidirected evolutionN-glycosylationoligosaccharyltransferasePglBprotein modelling

Identifiers

PMID25833378
PMCPMC4422122
OpenAlexW2102073086

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.