Solution structure of the orphan nuclear receptor Rev-erb beta response element by H-1, P-31 NMR and molecular simulation

Rev-erb beta is an orphan receptor that binds as a homodimer or as a monome r to DNA. The solution structure of the non-palindromic 15 bp DNA duplex d( TAGAATGTAGGTCAG), the response element of Rev-erb beta for monomeric bindin g, was determined by H-1 and P-31 NMR, energy minimization with NMR-derived restraints for distances and NOE back-calculation methods. The refined fin al structures have the typical overall features of B-type DNA. However, tit ration of this 15 bp duplex with ReDBD, the DNA binding domain of Rev-erb b eta, showed large shifts of imino protons and P-31 signals, suggesting majo r conformational changes. (C) 2000 Societe francaise de biochimie et biolog ie moleculaire / Editions scientifiques et medicales Elsevier SAS.