Genetic Manipulation of Staphylococcal Species
Summary
Genetic manipulation of Staphylococcus species underpins our understanding of these versatile bacteria, ranging from innocuous skin commensals to formidable pathogens such as Methicillin-resistant Staphylococcus aureus (MRSA). The establishment of robust tools to introduce, delete or modify chromosomal loci has transformed the study of virulence, antibiotic resistance and metabolic pathways. Early efforts relied upon temperature-sensitive allelic exchange vectors and natural or phage-mediated transduction, but these approaches were impeded by lineage-specific restriction-modification barriers. Recent years have seen the advent of tailored plasmid backbones, counter-selectable markers and host-adapted DNA methylation strategies, complemented by electroporation protocols optimised for clinical isolates. Moreover, CRISPR-Cas-based methods have emerged as precise, markerless approaches for gene disruption, repression or base editing, broadening the scope for functional genomics in both model and recalcitrant strains. Non-pathogenic species such as Staphylococcus carnosus have been harnessed as protein-expression platforms, enabling surface display and library screening applications. These advances carry global significance, facilitating the identification of novel therapeutic targets, informing vaccine design and guiding epidemiological surveillance of antibiotic resistance. Through iterative refinement of genetic tools, researchers are poised to interrogate staphylococcal biology with unprecedented resolution, thereby expediting translation to clinical and industrial contexts.
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Genetic Manipulation of Staphylococcal Species publication trend
The graph below shows the total number of articles in genetic manipulation of staphylococcal species across all publications each year (not limited to Nature Index journals).
Technical terms
Restriction-Modification (RM) system: A bacterial defence comprising restriction endonucleases and matching methyltransferases that degrade unmodified foreign DNA.
Allelic exchange: A homologous recombination strategy that replaces a chromosomal segment with a mutated or marked allele via a two-step plasmid integration and resolution process.
Counter-selectable marker: A genetic element whose expression becomes lethal or growth-inhibitory under specific conditions, allowing selection against undesired genotypes.
Plasmid Artificial Modification (PAM): Pre-methylation of plasmid DNA in a surrogate host to mimic recipient methylation patterns and evade restriction barriers.
Electroporation: A physical method that applies an electrical pulse to transiently permeabilise the bacterial cell envelope, facilitating uptake of exogenous DNA.
References
- Staphylococcus carnosus: from starter culture to protein engineering platform. Applied Microbiology and Biotechnology (2017).
- Mining the Methylome Reveals Extensive Diversity in Staphylococcus epidermidis Restriction Modification. mBio (2019).
- Use of the counter selectable marker PheS* for genome engineering in Staphylococcus aureus. Microbiology (2019).
- Genetic manipulation of Staphylococci—breaking through the barrier. Frontiers in Cellular and Infection Microbiology (2012).
- Improving Transformation of Staphylococcus aureus Belonging to the CC1, CC5 and CC8 Clonal Complexes. PLOS ONE (2015).
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