Convergent evolution involving dimeric and trimeric dUTPases in pathogenicity island mobilization

Area of Science:

• Molecular Biology
• Microbiology
• Virology

Background:

• dUTPase (Dut) enzymes prevent uracil incorporation into DNA.
• Trimeric Duts are known regulatory proteins involved in pathogenicity island transfer.
• Dimeric Duts from phage ϕNM1 also mobilize the Staphylococcus aureus pathogenicity island SaPIbov1.

Purpose of the Study:

• To elucidate the signaling mechanism of dimeric Duts in inducing the SaPIbov1 cycle.
• To investigate the regulatory role of dimeric Duts in pathogenicity island transfer.
• To compare the regulatory mechanisms of dimeric and trimeric Duts.

Main Methods:

• In vivo studies
• Biochemical assays
• Structural analyses

Main Results:

• Dimeric Duts utilize a signaling mechanism to induce SaPIbov1 transfer.
• A variable region, domain VI, is crucial for the regulatory function of dimeric Duts.
• The signaling mechanism of dimeric Duts is modulated by dUTP.
• Dimeric and trimeric Duts share analogous regulatory mechanisms for SaPI transfer.

Conclusions:

• Dimeric Duts are regulatory molecules that control SaPI transfer.
• The analogous mechanisms of dimeric and trimeric Duts in SaPI transfer exemplify convergent evolution.
• Duts play a significant conserved role as regulatory molecules in cellular processes.