>gnl|CDD|29475 cd00383, trans_reg_C, Effector domain of response regulator. Bacteria and certain eukaryotes like protozoa and higher plants use two-component signal transduction systems to detect and respond to changes in the environment. The system consists of a sensor histidine kinase and a response regulator. The former autophosphorylates in a histidine residue on detecting an external stimulus. The phosphate is then transferred to an invariant aspartate residue in a highly conserved receiver domain of the response regulator. Phosphorylation activates a variable effector domain of the response regulator, which triggers the cellular response. The C-terminal effector domain contains DNA and RNA polymerase binding sites. Several dimers or monomers bind head to tail to small tandem repeats upstream of the genes. The RNA polymerase binding sites interact with the alpha or sigma subunite of RNA polymerase.. Length = 95

 Score = 65.9 bits (161), Expect = 7e-12
 Identities = 28/91 (30%), Positives = 48/91 (52%), Gaps = 2/91 (2%)

Query: 129 GPIRVFSDGRDPEVQGEVFPLPRRERRILEYLMANRGKRVAKTQIFSAIYGLFDEAVEEN 188
           G + +    R+    GE   L  +E  +LE L  N G+ +++ Q+  A++G  D  V++ 
Sbjct: 4   GDLVLDPARREVTRDGEPVELTPKEFELLELLARNPGRVLSREQLLEAVWG-DDYDVDDR 62

Query: 189 VVESHISKLRKKLR-NKLGFDPVDSKRFLGY 218
            V+ HIS+LRKKL  +      + + R +GY
Sbjct: 63  TVDVHISRLRKKLEDDPSNPRLIKTVRGVGY 93