Cited by 138Escherichia coli research studiesBacterial Genetics and BiotechnologyClostridium difficile and Clostridium perfringens research

The StcE Protease Contributes to Intimate Adherence of Enterohemorrhagic Escherichia coli O157:H7 to Host Cells

Open access
Grys, Thomas E., Siegel, Matthew B., Lathem, Wyndham W., Welch, Rodney A.·2005·Infection and Immunity

Abstract

Enterohemorrhagic Escherichia coli(EHEC) O157:H7 is a diarrheal pathogen that causes attaching and effacing (A/E) lesions on intestinal epithelial cells. Strains of the O157 serogroup carry the large virulence plasmid pO157, which encodes the etp type II secretion system that secretes the genetically linked zinc metalloprotease StcE. The Ler regulator controls expression of many genes involved in A/E lesion formation, as well as StcE, suggesting StcE may be important at a similar time during colonization. Our laboratory has previously demonstrated that StcE cleaves C1-esterase inhibitor, a regulator of multiple inflammation pathways. Here we report two new substrates for StcE, mucin 7 and glycoprotein 340, and that purified StcE reduces the viscosity of human saliva. We tested the hypothesis that StcE contributes to intimate adherence of EHEC to host cells by cleavage of glycoproteins from the cell surface. The fluorescent actin stain (FAS) test was used to observe the intimate adherence represented by fluorescently stained bacteria colocalized with regions of bundled actin formed on HEp-2 cells. An E. coli O157:H7 strain with a stcE gene deletion was not affected in its ability to generally adhere to HEp-2 cells, but it did score threefold lower on the FAS test than wild-type or complemented strains. Addition of exogenous recombinant StcE increased intimate adherence of the mutant to wild-type levels. Thus, StcE may help block host clearance of E. coli O157:H7 by destruction of some classes of glycoproteins, and it contributes to intimate adherence of E. coli O157:H7 to the HEp-2 cell surface.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1128/iai.73.3.1295-1303.2005

Cites

72 of 72 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • StcE and SslE, metalloproteases from diarrheagenic E. coli strains, cleave mucin glycoproteins, which may help the pathogen to reach the epithelium.

    “StcE and SslE, metalloproteases from diarrheagenic E. coli strains, also cleave mucin glycoproteins, which may help the pathogen to reach the epithelium.74–76”
  • The zinc metalloproteases StcE and SslE secreted by E. coli EHEC and EPEC/ETEC respectively contribute to intimate adherence of these bacteria to host cells, a process essential for colonization.

    “Finally, the zinc metalloproteases StcE and SslE secreted by E. coli EHEC and EPEC/ETEC respectively, contribute to intimate adherence of these bacteria to host cells, a process that is essential for colonization.73–78”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 1

  1. Editor: A. D. O'Brien VOL. 73, 2005 StcE PROTEASE AND INTIMATE ADHERENCE 1303

Cited by

Sorted by citations

Authors
Grys, T. E., Siegel, M. B., Lathem, W. W., & Welch, R. A.
Affiliations
University of Wisconsin–Madison (US)
Venue
Infection and Immunity
Published
2005-03
Volume
73
Issue
3
Pages
1295-1303
ISSN
  • 0019-9567 (ISSN-L)
  • 1098-5522
OpenAlex
W2097638901
Cited by
138
References
72
Citations by year
2026: 8 · 2025: 7 · 2024: 2 · 2023: 3 · 2022: 12 · 2021: 7 · 2020: 6 · 2019: 5 · 2018: 6 · 2017: 5 · 2016: 6 · 2015: 4 · 2014: 6 · 2013: 9 · 2012: 7
FWCI
4.02
Type
journal article
Language
en
Open access
Locations
  • Infection and Immunity (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Digital Commons@Becker (Washington University School of Medicine) (submittedVersion)
Funders
  • National Institutes of Health
  • National Institute of General Medical Sciences (5T32GM08349, T32GM008349)
  • National Institute of Allergy and Infectious Diseases (R01AI051735)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK063250)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Endocrinology › Escherichia coli research studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Health Sciences › Medicine › Infectious Diseases › Clostridium difficile and Clostridium perfringens research
Keywords
Escherichia coli O157:H7, zinc metalloprotease, type II secretion system, C1 inhibitor, actin cytoskeleton, HEp-2 cells, saliva viscosity, attaching and effacing lesions
MeSH terms
Bacterial Adhesion, Cell Line, Humans, Metalloendopeptidases, Molecular Sequence Data, Mucins, Receptors, Immunologic, Saliva, Salivary Proteins and Peptides, Virulence, Sequence Analysis, DNA, Escherichia coli O157, Escherichia coli Proteins

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review