Herbaspirillum seropedicae signal transduction protein PII is structurally similar to the enteric GlnK.
Machado Benelli, E., Buck, M., Polikarpov, I., Maltempi de Souza, E., Cruz, L.M., Pedrosa, F.O.(2002) Eur.J.Biochem. 269: 3296-3303
- PubMed: 12084071 
- PubMed Abstract: 
PII-like proteins are signal transduction proteins found in bacteria, archaea and eukaryotes. They mediate a variety of cellular responses. A second PII-like protein, called GlnK, has been found in several organisms. In the diazotroph Herbaspirillum ...