1yui: Difference between revisions
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'''SOLUTION NMR STRUCTURE OF THE GAGA FACTOR/DNA COMPLEX, REGULARIZED MEAN STRUCTURE''' | '''SOLUTION NMR STRUCTURE OF THE GAGA FACTOR/DNA COMPLEX, REGULARIZED MEAN STRUCTURE''' | ||
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[[Category: Gronenborn, A M.]] | [[Category: Gronenborn, A M.]] | ||
[[Category: Omichinski, J G.]] | [[Category: Omichinski, J G.]] | ||
[[Category: | [[Category: Chromatin remodeling]] | ||
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Revision as of 13:48, 3 May 2008
SOLUTION NMR STRUCTURE OF THE GAGA FACTOR/DNA COMPLEX, REGULARIZED MEAN STRUCTURE
Overview
The structure of a complex between the DNA binding domain of the GAGA factor (GAGA-DBD) and an oligonucleotide containing its GAGAG consensus binding site has been determined by nuclear magnetic resonance spectroscopy. The GAGA-DBD comprises a single classical Cys2-His2 zinc finger core, and an N-terminal extension containing two highly basic regions, BR1 and BR2. The zinc finger core binds in the major groove and recognizes the first three GAG bases of the consensus in a manner similar to that seen in other classical zinc finger-DNA complexes. Unlike the latter, which require tandem zinc finger repeats with a minimum of two units for high affinity binding, the GAGA-DBD makes use of only a single finger complemented by BR1 and BR2. BR2 forms a helix that interacts in the major groove recognizing the last G of the consensus, while BR1 wraps around the DNA in the minor groove and recognizes the A in the fourth position of the consensus. The implications of the structure of the GAGA-DBD-DNA complex for chromatin remodelling are discussed.
About this Structure
1YUI is a Single protein structure of sequence from Drosophila melanogaster. Full crystallographic information is available from OCA.
Reference
The solution structure of a specific GAGA factor-DNA complex reveals a modular binding mode., Omichinski JG, Pedone PV, Felsenfeld G, Gronenborn AM, Clore GM, Nat Struct Biol. 1997 Feb;4(2):122-32. PMID:9033593 Page seeded by OCA on Sat May 3 16:48:31 2008
