Protein
Sensory histidine kinase/phosphatase NtrB
Organism
Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)
Function
Member of the two-component regulatory system NtrB/NtrC, which controls expression of the nitrogen-regulated (ntr) genes in response to nitrogen limitation. Under conditions of nitrogen limitation, NtrB autophosphorylates and transfers the phosphoryl group to NtrC. In the presence of nitrogen, acts as a phosphatase that dephosphorylates and inactivates NtrC.
Sequence
MASGIQPDAGQILNSLINSVLVVDDALAIHYANPAAQQLLAQSSRKLFGTPLPELLSYFSLNIDLMRESLAAGQGFTDNEVTLVIDSRSHILSLTAQRLPDDFILLEMAPMDNQRRLSQEQLQHAQQIAARDLVRGLAHEIKNPLGGLRGAAQLLSKALPDPALTEYTKVIIEQADRLRNLVDRLLGPQHPGMHITESIHKVAERVVALVSMELPDNVRLIRDYDPSLPELPHDPEQIEQVLLNIVRNALQALGPEGGEITLRTRTAFQLTLHGERYRLAARIDVEDNGPGIPPHLQDTLFYPMVSGREGGTGLGLSIARNLIDQHAGKIEFTSWPGHTEFSVYLPIRK