1qgp
From Proteopedia
NMR STRUCTURE OF THE Z-ALPHA DOMAIN OF ADAR1, 15 STRUCTURES
Overview
Double-stranded RNA deaminase I (ADAR1) contains the Z-DNA binding domain Zalpha. Here we report the solution structure of free Zalpha and map the interaction surface with Z-DNA, confirming roles previously assigned to residues by mutagenesis. Comparison with the crystal structure of the (Zalpha)(2)/Z-DNA complex shows that most Z-DNA contacting residues in free Zalpha are prepositioned to bind Z-DNA, thus minimizing the entropic cost of binding. Comparison with homologous (alpha+beta)helix-turn-helix/B-DNA complexes suggests that binding of Zalpha to B-DNA is disfavored by steric hindrance, but does not eliminate the possibility that related domains may bind to both B- and Z-DNA.
About this Structure
1QGP is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
The solution structure of the Zalpha domain of the human RNA editing enzyme ADAR1 reveals a prepositioned binding surface for Z-DNA., Schade M, Turner CJ, Kuhne R, Schmieder P, Lowenhaupt K, Herbert A, Rich A, Oschkinat H, Proc Natl Acad Sci U S A. 1999 Oct 26;96(22):12465-70. PMID:10535945 Page seeded by OCA on Sat May 3 06:14:57 2008
