1BXD
NMR STRUCTURE OF THE HISTIDINE KINASE DOMAIN OF THE E. COLI OSMOSENSOR ENVZ
Summary for 1BXD
| Entry DOI | 10.2210/pdb1bxd/pdb |
| Descriptor | PROTEIN (OSMOLARITY SENSOR PROTEIN (ENVZ)), PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER (2 entities in total) |
| Functional Keywords | histidine kinase, osmosensor, his-asp phosphorelay system, signal transduction, transferase |
| Biological source | Escherichia coli BL21(DE3) |
| Cellular location | Cell inner membrane; Multi-pass membrane protein: P02933 |
| Total number of polymer chains | 1 |
| Total formula weight | 17923.89 |
| Authors | Tanaka, T.,Saha, S.K.,Tomomori, C.,Ishima, R.,Liu, D.,Tong, K.I.,Park, H.,Dutta, R.,Qin, L.,Swindells, M.B.,Yamazaki, T.,Ono, A.M.,Kainosho, M.,Inouye, M.,Ikura, M. (deposition date: 1998-10-02, release date: 1999-10-02, Last modification date: 2023-12-27) |
| Primary citation | Tanaka, T.,Saha, S.K.,Tomomori, C.,Ishima, R.,Liu, D.,Tong, K.I.,Park, H.,Dutta, R.,Qin, L.,Swindells, M.B.,Yamazaki, T.,Ono, A.M.,Kainosho, M.,Inouye, M.,Ikura, M. NMR structure of the histidine kinase domain of the E. coli osmosensor EnvZ. Nature, 396:88-92, 1998 Cited by PubMed Abstract: Bacteria live in capricious environments, in which they must continuously sense external conditions in order to adjust their shape, motility and physiology. The histidine-aspartate phosphorelay signal-transduction system (also known as the two-component system) is important in cellular adaptation to environmental changes in both prokaryotes and lower eukaryotes. In this system, protein histidine kinases function as sensors and signal transducers. The Escherichia coli osmosensor, EnvZ, is a transmembrane protein with histidine kinase activity in its cytoplasmic region. The cytoplasmic region contains two functional domains: domain A (residues 223-289) contains the conserved histidine residue (H243), a site of autophosphorylation as well as transphosphorylation to the conserved D55 residue of response regulator OmpR, whereas domain B (residues 290-450) encloses several highly conserved regions (G1, G2, F and N boxes) and is able to phosphorylate H243. Here we present the solution structure of domain B, the catalytic core of EnvZ. This core has a novel protein kinase structure, distinct from the serine/threonine/tyrosine kinase fold, with unanticipated similarities to both heatshock protein 90 and DNA gyrase B. PubMed: 9817206DOI: 10.1038/23968 PDB entries with the same primary citation |
| Experimental method | SOLUTION NMR |
Structure validation
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