SMAR1 (Scaffold/Matrix attachment region-binding protein 1; also known as BANP), a tumour-suppressor MAR-binding protein that down-regulates Cyclin D1 expression by recruiting HDAC1-mSin3A co-repressor complex at Cyclin D1 promoter locus; SMAR1 is the target of prostaglandin A2 (PGA2) induced growth arrest.
NACC1, a novel member of the POZ/BTB (Pox virus and Zinc finger/Bric-a-bracTramtrack Broad complex), but which varies from other proteins of this class in that it lacks the characteristic DNA-binding motif.
This domain is predicted to form an all-alpha fold with four conserved helices. Its conservation pattern revealed several conserved residues, most of which have hydrophobicside-chains and are likely to stabilise the fold through helix-helix packing.
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