1je8
Two-Component response regulator NarL/DNA Complex: DNA Bending Found in a High Affinity Site
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OverviewOverview
Two-component signal transduction systems are modular phosphorelay, regulatory pathways common in prokaryotes. In the co-crystal structure of, the Escherichia coli NarL signal output domain bound to DNA, we observe, how the NarL family of two-component response regulators can bind DNA. DNA, recognition is accompanied by the formation of a new dimerization, interface, which could occur only in the full-length protein via a large, intramolecular domain rearrangement. The DNA is recognized by the, concerted effects of solvation, van der Waals forces and inherent DNA, deformability, rather than determined primarily by major groove hydrogen, bonding. These subtle forces permit a small DNA-binding domain to perturb, the DNA helix, leading to major DNA curvature and a transition from B- to, A-form DNA at the binding site, where valine on the recognition helix, interacts unexpectedly with the polar major groove floor.
About this StructureAbout this Structure
1JE8 is a Single protein structure of sequence from Escherichia coli with SO4 as ligand. Full crystallographic information is available from OCA.
ReferenceReference
Dimerization allows DNA target site recognition by the NarL response regulator., Maris AE, Sawaya MR, Kaczor-Grzeskowiak M, Jarvis MR, Bearson SM, Kopka ML, Schroder I, Gunsalus RP, Dickerson RE, Nat Struct Biol. 2002 Oct;9(10):771-8. PMID:12352954
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