1jgg
Even-skipped Homeodomain Complexed to AT-rich DNAEven-skipped Homeodomain Complexed to AT-rich DNA
Structural highlights
Function[EVE_DROME] May play a role in determining neuronal identity. May be directly involved in specifying identity of individual neurons. Pair-rule protein required for segmentation; involved in transforming the broad, spatial, aperiodic expression patterns of the gap genes into a system of precise periodic expression patterns of the pair-rule and segmentary polarity genes. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedeven-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. 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[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References |
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