Arginine repressor

spinqualitylabelsall models E. coli structure of arginine repressor C terminal hexamer complex with arginine (PDB entry 1xxb) Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Function Arginine repressor (ArgR) is a prokaryotic repressor which regulates the arginine deiminase pathway. In this pathway, arginine is metabolized to form ammonia, CO2 and ATP. The ArgR releases the expression of the arginine deiminase pathway in the presence of arginine. The genes controlled by ArgR are not found in a single operon. While repressors are usually active as dimers, ArgR is a hexamer and binds to 2 palindromic DNA sites called ARG box in its N terminal domain. Structural highlights The structure of ArgR shows a DNA-binding domain at the acidic N-terminal and a basic C-terminal domain which contains the intersubunit interaction sites and the Arg binding site. Every Arg ligand interacts with residues from 3 subunits. 3D structures of arginine repressor Arginine repressor 3D structures

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