Abstract
Many bacteria use the second messenger cyclic diguanylate (c-di-GMP) to control motility, biofilm production and virulence. Here, we identify a thermosensory diguanylate cyclase (TdcA) that modulates temperature-dependent motility, biofilm development and virulence in the opportunistic pathogen Pseudomonas aeruginosa. TdcA synthesizes c-di-GMP with catalytic rates that increase more than a hundred-fold over a ten-degree Celsius change. Analyses using protein chimeras indicate that heat-sensing is mediated by a thermosensitive Per-Arnt-SIM (PAS) domain. TdcA homologs are widespread in sequence databases, and a distantly related, heterologously expressed homolog from the Betaproteobacteria order Gallionellales also displayed thermosensitive diguanylate cyclase activity. We propose, therefore, that thermotransduction is a conserved function of c-di-GMP signaling networks, and that thermosensitive catalysis of a second messenger constitutes a mechanism for thermal sensing in bacteria.
| Original language | English |
|---|---|
| Article number | 1986 |
| Journal | Nature Communications |
| Volume | 12 |
| Issue number | 1 |
| DOIs | |
| State | Published - Dec 1 2021 |
Funding
The authors thank Lynne Howell for providing anti-PelC, anti-PelD, and anti-PslG antibodies. T.E.R. and J.D.R. have been supported by a Queen Elizabeth II Scholarship, and H.A. by an Eyes-High Postdoctoral Scholar Award from the University of Calgary. J. J.H. is supported by the Leader’s Opportunity Fund of the Canada Foundation for Innovation (CFI), and a Project Scheme Grant and Canada Research Chair from the Canadian Institutes for Health Research (CIHR).
| Funders | Funder number |
|---|---|
| R01AI077628 | |
| University of Calgary | |
| Canadian Institutes of Health Research | |
| Canada Foundation for Innovation | |
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