Document 0477 DOCN M9440477 TI Secondary structure and signal assignments of human-immunodeficiency-virus-1 protease complexed to a novel, structure-based inhibitor. DT 9404 AU Yamazaki T; Nicholson LK; Torchia DA; Stahl SJ; Kaufman JD; Wingfield PT; Domaille PJ; Campbell-Burk S; Bone Research Branch, National Institute of Dental Research, NIH,; Bethesda, MD 20892. SO Eur J Biochem. 1994 Jan 15;219(1-2):707-12. Unique Identifier : AIDSLINE MED/94139754 AB We report comprehensive NMR studies in solution of the human-immunodeficiency-virus (HIV)-1 protease. Stable solutions of the protease were obtained by complexing the protein to a designed cyclic urea inhibitor DMP 323. A variety of triple-resonance experiments provided essentially complete 1H, 13C and 15N NMR signal assignments of the protease. These assignments, together with short-range NOE constraints, coupling constants and hydrogen-exchange data, yielded the secondary structure of the protease in solution. The results reported herein open the way to the determination of the high-resolution three-dimensional solution structures of protease/inhibitor complexes, as well as to studies of protease dynamics and solvent interactions. DE Amino Acid Sequence Cloning, Molecular Escherichia coli HIV Protease/*CHEMISTRY/*METABOLISM HIV Protease Inhibitors/*METABOLISM Molecular Sequence Data Mutagenesis, Site-Directed Nuclear Magnetic Resonance/METHODS Point Mutation Protein Binding *Protein Structure, Secondary Recombinant Proteins/CHEMISTRY/METABOLISM Support, U.S. Gov't, P.H.S. Urea/*ANALOGS & DERIVATIVES/METABOLISM JOURNAL ARTICLE SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).