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Updated: May 17, 2025
Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
Antibacterial Activity of the p53 Tumor Suppressor Protein-How Strong Is the Evidence?
Agnieszka Gdowicz-Kłosok1, Małgorzata Krześniak1, Barbara Łasut-Szyszka1
1Center for Translational Research and Molecular Biology of Cancer, Maria Skłodowska-Curie National Research Institute of Oncology, Gliwice Branch, 44-101 Gliwice, Poland.
Abstract:
The p53 tumor suppressor is best known for controlling the cell cycle, apoptosis, DNA repair, and metabolism, but it also regulates immunity and is able to impede the live cycle of viruses. For this reason, these infectious agents encode proteins which inactivate p53. However, what is less known is that p53 can also be inactivated by human pathogenic bacteria. It is probably not due to collateral damage, but specific targeting, because p53 could interfere with their multiplication. The mechanisms of the antibacterial activity of p53 are poorly known. However, they can be inferred from the results of high-throughput studies, which have identified more than a thousand p53-activated genes. As it turns out, many of these genes code proteins which have proven or plausible antibacterial functions like the efficient detection of bacteria by pattern recognition receptors, the induction of pro-inflammatory pyroptosis, the recruitment of immune cells, direct bactericidal activity, and the presentation of bacterial metabolites to lymphocytes. Probably there are more antibacterial, p53-regulated functions which were overlooked because laboratory animals are kept in sterile conditions. In this review, we present the outlines of some intriguing antibacterial mechanisms of p53 which await further exploration. Definitely, this area of research deserves more attention, especially in light of the appearance of antibiotic-resistant bacterial strains.
Insights
The p53 tumor suppressor protein, known for its roles in cancer suppression, also fights bacterial infections. This review explores p53
Area of Science:
- Molecular Biology
- Immunology
- Microbiology
Background:
- The p53 tumor suppressor is a critical regulator of cell cycle, apoptosis, DNA repair, and metabolism.
- While p53's antiviral roles are recognized, its function in combating bacterial pathogens is less understood.
- Viruses and pathogenic bacteria encode proteins that inactivate p53, suggesting its interference with their life cycles.
Purpose of the Study:
- To review and highlight the emerging understanding of p53's antibacterial activities.
- To explore the mechanisms by which p53 may directly or indirectly inhibit bacterial multiplication.
- To emphasize the need for further research into p53's role in host defense against bacteria.
Main Methods:
- Review of existing literature, focusing on high-throughput studies identifying p53-activated genes.
- Inference of p53's antibacterial mechanisms based on the functions of its target genes.
- Analysis of potential overlooked antibacterial functions of p53 in non-sterile environments.
Main Results:
- High-throughput studies reveal over a thousand p53-activated genes.
- Many p53-activated genes encode proteins with known or plausible antibacterial functions.
- These functions include bacterial detection, pyroptosis induction, immune cell recruitment, direct killing, and antigen presentation.
Conclusions:
- p53 possesses significant, yet underexplored, antibacterial activities.
- The mechanisms involve a broad range of host defense pathways.
- Further investigation is crucial, particularly given the rise of antibiotic resistance.
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