The nuclear protooncoprotein SKI negatively regulates transforming growth factor-beta (TGF-beta) signaling in cell growth and differentiation. It directly interacts with the Smads and, by various mechanisms, represses the transcription of TGF-beta-responsive genes. SKI is a multidomain protein that includes a domain bearing high sequence similarity with the retinal determination protein Dachshund (the Dachshund homology domain, DHD). The SKI-DHD has been implicated in SMAD-2/3, N-CoR, SKIP, and PML-RARalpha binding. The 1.65 A crystal structure of the Dachshund homology domain of human SKI is reported here. The SKI-DHD adopts a mixed alpha/beta structure which includes features found in the forkhead/winged-helix family of DNA binding proteins, although SKI-DHD is not a DNA binding domain. Residues that form a contiguous surface patch on SKI-DHD are conserved within the Ski/Sno family and with Dachshund, suggesting that this domain may mediate intermolecular interactions common to these proteins.
Crystal structure of the dachshund homology domain of human SKI.,Wilson JJ, Malakhova M, Zhang R, Joachimiak A, Hegde RS Structure. 2004 May;12(5):785-92. PMID:15130471
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
↑ Wilson JJ, Malakhova M, Zhang R, Joachimiak A, Hegde RS. Crystal structure of the dachshund homology domain of human SKI. Structure. 2004 May;12(5):785-92. PMID:15130471 doi:10.1016/j.str.2004.02.035