CTBP/BARS in ternary complex with NAD(H) and RRTGAPPAL peptide
[CTBP1_RAT] Involved in controlling the equilibrium between tubular and stacked structures in the Golgi complex. Corepressor targeting diverse transcription regulators such as GLIS2. Has dehydrogenase activity. Functions in brown adipose tissue (BAT) differentiation.   [ZN217_HUMAN] Binds to the promoters of target genes and functions as repressor. Promotes cell proliferation and antagonizes cell death. Promotes phosphorylation of AKT1 at 'Ser-473'.   
Publication Abstract from PubMed
Numerous transcription factors recruit C-terminal binding protein (CtBP) corepressors. We show that the large zinc finger protein ZNF217 contacts CtBP. ZNF217 is encoded by an oncogene frequently amplified in tumors. ZNF217 contains a typical Pro-X-Asp-Leu-Ser (PXDLS) motif that binds in CtBP's PXDLS-binding cleft. However, ZNF217 also contains a second motif, Arg-Arg-Thr (RRT), that binds a separate surface on CtBP. The crystal structure of CtBP bound to an RRTGAPPAL peptide shows that it contacts a surface crevice distinct from the PXDLS binding cleft. Interestingly, both PXDLS and RRT motifs are also found in other zinc finger proteins, such as RIZ. Finally, we show that ZNF217 represses several promoters, including one from a known CtBP target gene, and mutations preventing ZNF217's contact with CtBP reduce repression. These results identify a new CtBP interaction motif and establish ZNF217 as a transcriptional repressor protein that functions, at least in part, by associating with CtBP.
Specific recognition of ZNF217 and other zinc finger proteins at a surface groove of C-terminal binding proteins.,Quinlan KG, Nardini M, Verger A, Francescato P, Yaswen P, Corda D, Bolognesi M, Crossley M Mol Cell Biol. 2006 Nov;26(21):8159-72. Epub 2006 Aug 28. PMID:16940172
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.