The DOI matches its Crossref record; 37 of the 37 references it cites were found in a registry or an index.
Systematic mutagenesis of the Helicobacter pylori cag pathogenicity island: essential genes for CagA translocation in host cells and induction of interleukin‐8
Open accessAbstract
Helicobacter pylori (Hp) carries a type IV secretion system encoded by the cag pathogenicity island (cag‐PAI), which is used to: (i) translocate the bacterial effector protein CagA into different types of eukaryotic cells; and (ii) induce the synthesis and secretion of chemokines, such as interleukin‐8 (IL‐8). The cag‐PAI in Hp 26695 consists of 27 putative genes, six of which were identified as homologues to the basic type IV secretion system represented by the Agrobacterium tumefaciens virB operon. To define the role and contribution of each of the 27 genes, we applied a precise deletion/insertion mutagenesis procedure to knock out each individual gene without causing polar effects on the expression of downstream genes. Seventeen out of 27 genes were found to be absolutely essential for translocation of CagA into host cells and 14 out of 27 for the ability of Hp fully to induce transcription of IL‐8. The products of hp0524 (virD4 homologue), hp0526 and hp0540 are absolutely essential for the translocation of CagA, but not for the induction of IL‐8. In contrast, the products of hp0520, hp0521, hp0534, hp0535, hp0536 and hp0543 are not necessary for either translocation of CagA or for IL‐8 induction. Our data argue against a translocated IL‐8‐inducing effector protein encoded by the cag‐PAI. We isolated a variant of Hp 26695, which spontaneously switched off its capacity for IL‐8 induction and translocation of CagA, but retained the complete cag‐PAI. We identified a point mutation in gene hp0532, causing a premature translational stop in the corresponding polypeptide chain, providing a putative explanation for the defect in the type IV secretion system of the spontaneous mutant.
Overview
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.
Integrity signals
Registry
Cites
Statistics
Verification
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.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Cleavage of Structural Proteins during the Assembly of the Head of Bacteriophage T4
LAEMMLI, U. K. (1970) · Nature · doi:10.1038/227680a0 · Cited by 249,961
Molecular Cloning: A Laboratory Manual
Sambrook, J., Fritsch, E., & Maniatis, T. (1989) · UCLA - Biblioteca de Ciencias de la Salud · Cited by 133,589
Molecular cloning: A laboratory manual
Deininger, P. (1990) · Analytical Biochemistry · doi:10.1016/0003-2697(90)90595-z · Cited by 84,682
A complementation analysis of the restriction and modification of DNA in Escherichia coli
Boyer, H. W., & Roulland-dussoix, D. (1969) · Journal of Molecular Biology · doi:10.1016/0022-2836(69)90288-5 · Cited by 3,823
The complete genome sequence of the gastric pathogen Helicobacter pylori
Tomb, J.-F., White, O., Kerlavage, A. R., Clayton, R. A., Sutton, G. G., Fleischmann, R. D., Ketchum, K. A., Klenk, H. P., Gill, S., Dougherty, B. A., et al. (1997) · Nature · doi:10.1038/41483 · Cited by 3,529
FACS-optimized mutants of the green fluorescent protein (GFP)
Cormack, B. P., Valdivia, R. H., & Falkow, S. (1996) · Gene · doi:10.1016/0378-1119(95)00685-0 · Cited by 2,620
Interleukin-1 polymorphisms associated with increased risk of gastric cancer
El-Omar, E. M., Carrington, M., Chow, W.-H., McColl, K. E. L., Bream, J. H., Young, H. A., Herrera, J., Lissowska, J., Yuan, C.-C., Rothman, N., et al. (2000) · Nature · doi:10.1038/35006081 · Cited by 2,366
Alm, R. A., Ling, L.-S. L., Moir, D. T., King, B. L., Brown, E. D., Doig, P. C., Smith, D. R., Noonan, B., Guild, B. C., deJonge, B. L., et al. (1999) · Nature · doi:10.1038/16495 · Cited by 1,893
Censini, S., Lange, C., Xiang, Z., Crabtree, J. E., Ghiara, P., Borodovsky, M., Rappuoli, R., & Covacci, A. (1996) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.93.25.14648 · Cited by 1,872
Translocation of Helicobacter pylori CagA into Gastric Epithelial Cells by Type IV Secretion
Odenbreit, S., Püls, J., Sedlmaier, B., Gerland, E., Fischer, W., & Haas, R. (2000) · Science · doi:10.1126/science.287.5457.1497 · Cited by 1,286
Self-citation
Cited by
Pathogenesis of Helicobacter pylori Infection
Kusters, J. G., van Vliet, A. H. M., & Kuipers, E. J. (2006) · Clinical Microbiology Reviews · doi:10.1128/cmr.00054-05 · Cited by 2,526
Pathogenicity Islands in BacterialPathogenesis
Schmidt, H., & Hensel, M. (2004) · Clinical Microbiology Reviews · doi:10.1128/cmr.17.1.14-56.2004 · Cited by 776
Helicobacter pylori evolution and phenotypic diversification in a changing host
Suerbaum, S., & Josenhans, C. (2007) · Nature Reviews Microbiology · doi:10.1038/nrmicro1658 · Cited by 384
Blanc, M., Lettl, C., Guérin, J., Vieille, A., Furler, S., Briand-Schumacher, S., Dreier, B., Bergé, C., Plückthun, A., Vadon-Le Goff, S., et al. (2023) · PLOS Pathogens · doi:10.1371/journal.ppat.1011368 · Cited by 9
Self-citation
Metadata
- Authors
- Fischer, W., Püls, J., Buhrdorf, R., Gebert, B., Odenbreit, S., & Haas, R.
- Venue
- Molecular Microbiology
- Publisher
- Wiley
- Published
- 2001-12
- Volume
- 42
- Issue
- 5
- Pages
- 1337-1348
- ISSN
- 0950-382X (ISSN-L)
- 1365-2958
- OpenAlex
- W2087327203
- Cited by
- 508
- References
- 37
- FWCI
- 23.29
- Type
- journal article
- Language
- en
- Open access
- bronze
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
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Systematic mutagenesis of the Helicobacter pylori cag pathogenicity island: essential genes for CagA translocation in host cells and induction of interleukin‐8. https://app.cochat.ai/papers/10.1046/j.1365-2958.2001.02714.x
- The paper
- Fischer, W., Püls, J., Buhrdorf, R., Gebert, B., Odenbreit, S., & Haas, R. (2001). Systematic mutagenesis of the Helicobacter pylori cag pathogenicity island: essential genes for CagA translocation in host cells and induction of interleukin‐8. Molecular Microbiology. https://doi.org/10.1046/j.1365-2958.2001.02714.x
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
