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The YmdB Phosphodiesterase Is a Global Regulator of Late Adaptive Responses in Bacillus subtilis

Lookup NU author(s): Dr Joseph Newman, Dr Cecilia Rodrigues, Professor Rick Lewis


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Bacillus subtilis mutants lacking ymdB are unable to form biofilms, exhibit a strong overexpression of the flagellin gene hag, and are deficient in SlrR, a SinR antagonist. Here, we report the functional and structural characterization of YmdB, and we find that YmdB is a phosphodiesterase with activity against 2', 3'- and 3', 5'-cyclic nucleotide monophosphates. The structure of YmdB reveals that the enzyme adopts a conserved phosphodiesterase fold with a binuclear metal center. Mutagenesis of a catalytically crucial residue demonstrates that the enzymatic activity of YmdB is essential for biofilm formation. The deletion of ymdB affects the expression of more than 800 genes; the levels of the sigma(D)-dependent motility regulon and several sporulation genes are increased, and the levels of the SinR-repressed biofilm genes are decreased, confirming the role of YmdB in regulating late adaptive responses of B. subtilis.

Publication metadata

Author(s): Diethmaier C, Newman JA, Kovacs AT, Kaever V, Herzberg C, Rodrigues C, Boonstra M, Kuipers OP, Lewis RJ, Stulke J

Publication type: Article

Publication status: Published

Journal: Journal of Bacteriology

Year: 2014

Volume: 196

Issue: 2

Pages: 265-275

Print publication date: 01/01/2014

ISSN (print): 0021-9193

ISSN (electronic): 1098-5530

Publisher: American Society for Microbiology


DOI: 10.1128/JB.00826-13


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Funder referenceFunder name
BBSRC (United Kingdom)
ERANET SysMO1 initiative
ERANET SysMO2 initiative
ALW-NWO (The Netherlands)
SFB860DFG (Germany)