Solution structure of the DNA binding domain of a nucleoid-associated protein, H-NS, from Escherichia coli

Abstract

The three-dimensional structure of the C-terminal domain (47 residues) obtained from the hydrolysis of H-NS protein with bovine trypsin was determined by NMR measurements and distance geometry calculations. It is composed of an antiparallel β-sheet, an α-helix and a 3 10-helix which form a hydrophobic core, stabilizing the whole structure. This domain has been found to bind to DNA. Possible DNA binding sites are discussed on the basis of the solution structure of the C-terminal domain of H-NS.