title: Protein engineering of bacterial histidine kinase receptor systems.
abstract: Two-component systems (TCS) involving the His-Asp phosphotransfer are commonly utilized for signal transduction in prokaryotes in which the two essential components are a sensor histidine kinase (HK) receptor and a response regulator (RR). Despite great efforts in structural and functional characterization of signal perception mechanisms, the exact signaling mechanisms remain elusive for many TCSs. Mimicking the natural TCS signaling pathways, chimeric receptor kinases and response regulators have been constructed through the process of swapping modular domains of related TCSs. To design chimeras with new signaling pathways, domains from different proteins that have little relationship at the primary structural level but carrying desirable functional properties can be conjoined to engineer novel TCSs. These chimeras maintain the ability to respond to environmental stimulants by regulating protein phosphorylation to produce downstream output signals. Depending on the nature of external signals, chimeric TCSs can serve as a novel tool not only to examine the natural signaling mechanisms in TCSs, but also for industrial and clinical applications.
authors.affiliation: Structural Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA.
authors.forename: Wei
authors.initials: W
authors.lastname: Xie
authors.forename: Katherine Y
authors.initials: KY
authors.lastname: Blain
authors.forename: Mario Meng-Chiang
authors.initials: MM
authors.lastname: Kuo
authors.forename: Senyon
authors.initials: S
authors.lastname: Choe
mesh_terms: D001425:Bacterial Outer Membrane Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D001426:Bacterial Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D002628:Chemoreceptor Cells / Q000737:chemistry / Q000378:metabolism; D029968:Escherichia coli Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D000071677:Histidine Kinase; D008565:Membrane Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D008958:Models, Molecular; D009097:Multienzyme Complexes / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D015202:Protein Engineering / Q000379:methods*; D011494:Protein Kinases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D011956:Receptors, Cell Surface; D011993:Recombinant Fusion Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D015398:Signal Transduction; D015534:Trans-Activators / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D020798:Two-Hybrid System Techniques
chemical_list: D001425:Bacterial Outer Membrane Proteins; D001426:Bacterial Proteins; D029968:Escherichia coli Proteins; D008565:Membrane Proteins; D009097:Multienzyme Complexes; D011956:Receptors, Cell Surface; D011993:Recombinant Fusion Proteins; C057331:Tar protein, E coli; D015534:Trans-Activators; C041476:Trg protein, E coli; C112177:osmolarity response regulator proteins; D011494:Protein Kinases; D000071677:Histidine Kinase; C065271:arcB protein, E coli; C057843:envZ protein, E coli