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DgcZ from E. coli
Diguanylate cyclases synthesize cyclic dimeric-GMP (c-di-GMP) from two GTP molecules.
C-di-GMP is a second messenger in the production of poly-β-1,6-N-acetylglucosamine (poly-GlcNAc)
poly-β-1,6-N-acetylglucosamine
, a polysaccharide required for
E. coli biofilm production. This biofilm allows
E. coli to adhere to extracellular surfaces. The DgcZ protein is made of two domains: the catalytic GGDEF domain responsible for sythnesizing c-di-GMP and the regulatory CZB domain that binds zinc. When zinc is bound, the CZB and GGDEF domains adopt conformations that inhibit DgcZ function.
Structural Overview
GGDEF Domain
CZB Domain
Mechanism of Action
Zinc Ligand(s)
Other Ligands
References