Regulation of ammonium assimilation in Haloferax mediterranei: Interaction between glutamine synthetase and two GlnK proteins

► H. mediterranei has two PII gene copies, both attached to ammonium transporters. ► 2-oxoglutarate as a signal for GlnK interaction with glutamine synthetase. ► Glutamine synthetase activity increase due to formation of complex with GlnK.