Sandbox Reserved 1071

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This Sandbox is Reserved from 02/09/2015, through 05/31/2016 for use in the course "CH462: Biochemistry 2" taught by Geoffrey C. Hoops at the Butler University. This reservation includes Sandbox Reserved 1051 through Sandbox Reserved 1080.
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DgcZ from E. coli

Diguanylate cyclases synthesize cyclic dimeric-GMP (c-di-GMP) from two GTP molecules.

 
cyclic-dimeric-GMP

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.

E. coli Diguanylate cyclase

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Structural Overview

GGDEF Domain

CZB Domain

Mechanism of Action

Zinc Ligand(s)

Other Ligands

References