Along with seryl-phosphorylated HPr, phosphorylated Crh is implicated in carbon catabolite repression (CCR) of levanase, inositol dehydrogenase, and beta-xylosidase. Exerts its effect on CCR by interacting with CcpA. Mixture of monomers and homodimers. Interacts with CcpA as a monomer. Not phosphorylated by PEP and by enzyme I. Belongs to the HPr family.