Structure and functional analysis of the MYND domain

Journal of Molecular Biology
Roberta SpadacciniMichael Sattler

Abstract

The MYND domain (named after myeloid translocation protein 8, Nervy, and DEAF-1) is a conserved zinc binding domain. It is defined by seven conserved cysteine residues and a single histidine residue that are arranged in a C4-C2HC consensus. MYND domains exist in a large number of proteins that play important roles in development or are associated with cancers and have been shown to mediate protein-protein interactions, mainly in the context of transcriptional regulation. We have determined the three-dimensional structure of the MYND domain from human deformed epidermal autoregulatory factor-1 (DEAF-1). The structure reveals a novel zinc binding fold, in which the C4-C2HC motif forms two sequential zinc binding sites. The first and second zinc binding modules comprise a small beta hairpin and two short alpha helices, respectively. The sequential topology of the two zinc binding sites is distinct from the cross-brace PHD and RING finger folds but has some resemblance to LIM domains. The structure reveals that the MYND domain is a novel member of the treble-clef family of zinc binding domains. The MYND domains of BS69 and BOP bind ligands comprising a PXLXP peptide motif. On the basis of the solution structure of the DEAF-1 MYND d...Continue Reading

Citations

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