Characterization of the MPN229 Gene in Mycoplasma pneumoniae
Author Information
Author(s): Marcel Sluijter, Theo Hoogenboezem, Nico G Hartwig, Cornelis Vink
Primary Institution: Erasmus MC, Laboratory of Pediatrics, Pediatric Infectious Diseases, Rotterdam, the Netherlands
Hypothesis
The MPN229 gene encodes a protein that is involved in homologous DNA recombination in Mycoplasma pneumoniae.
Conclusion
The MPN229 gene encodes a protein that binds single-stranded DNA and stimulates DNA recombination, suggesting its role in antigenic variation of Mycoplasma pneumoniae.
Supporting Evidence
- The MPN229 ORF encodes a 166-amino acid protein with a molecular mass of 18.4 kDa.
- Mpn SSB binds single-stranded DNA with higher affinity for longer substrates.
- Mpn SSB stimulates E. coli RecA-mediated DNA strand exchange.
Takeaway
The MPN229 gene makes a protein that helps the bacteria stick to and change its DNA, which might help it avoid our immune system.
Methodology
The MPN229 gene was cloned, expressed in E. coli, and the resulting protein was purified and analyzed for its DNA-binding and recombination-stimulating activities.
Digital Object Identifier (DOI)
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