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1jgg
From Proteopedia
Even-skipped Homeodomain Complexed to AT-rich DNA
Overview
even-skipped is a homeobox gene important in controlling segment patterning in the embryonic fruit fly. Its homeobox encodes a DNA binding domain which binds with similar affinities to two DNA consensus sequences, one AT-rich, the other GC-rich. We describe a crystallographic analysis of the Even-skipped homeodomain complexed to an AT-rich oligonucleotide at 2.0 A resolution. The structure reveals a novel arrangement of two homeodomains bound to one 10 bp DNA sequence in a tandem fashion. This arrangement suggests a mechanism for the homeoproteins' regulatory specificity. In addition, the functionally important residue Gln50 is observed in multiple conformations making direct and water-mediated hydrogen bonds with the DNA bases.
About this Structure
1JGG is a Single protein structure of sequence from Drosophila melanogaster. Full crystallographic information is available from OCA.
Reference
Structure of the even-skipped homeodomain complexed to AT-rich DNA: new perspectives on homeodomain specificity., Hirsch JA, Aggarwal AK, EMBO J. 1995 Dec 15;14(24):6280-91. PMID:8557047 Page seeded by OCA on Fri May 2 21:11:37 2008
