Structural highlights
Function
DOSP_ECOLI Heme-based oxygen sensor protein displaying phosphodiesterase (PDE) activity toward c-di-GMP in response to oxygen availability. Involved in the modulation of intracellular c-di-GMP levels, in association with DosC which catalyzes the biosynthesis of c-di-GMP (diguanylate cyclase activity). Cyclic-di-GMP is a second messenger which controls cell surface-associated traits in bacteria. Has very poor PDE activity on cAMP (PubMed:15995192) but is not active with cGMP, bis(p-nitrophenyl) phosphate or p-nitrophenyl phosphate (PubMed:11970957). Via its PDE activity on c-di-GMP, DosP regulates biofilm formation through the repression of transcription of the csgBAC operon, which encodes curli structural subunits.[1]
References
- ↑ Tagliabue L, Maciag A, Antoniani D, Landini P. The yddV-dos operon controls biofilm formation through the regulation of genes encoding curli fibers' subunits in aerobically growing Escherichia coli. FEMS Immunol Med Microbiol. 2010 Aug;59(3):477-84. doi:, 10.1111/j.1574-695X.2010.00702.x. Epub 2010 May 20. PMID:20553324 doi:10.1111/j.1574-695X.2010.00702.x
