Transcriptional corepressor which facilitates transcriptional repression via its association with DNA-binding transcription factors and recruitment of other corepressors and histone-modifying enzymes (PubMed:12559562, PubMed:15203199, PubMed:10688654). Can repress the expression of MMP7 in a ZBTB33-dependent manner (PubMed:23251453). Can repress transactivation mediated by TCF12 (PubMed:16803958). Acts as a negative regulator of adipogenesis (By similarity). The AML1-MTG8/ETO fusion protein frequently found in leukemic cells is involved in leukemogenesis and contributes to hematopoietic stem/progenitor cell self-renewal (PubMed:23812588). Homooligomer. Homotetramerization is mediated by nervy homology region 2 (NRH2). Can interact with CBFA2T2 and CBFA2T3; heterotetramerization between members of the CBFA2T family is proposed. Interacts with TCF12, SIN3A, HDAC1, HDAC2, HDAC3, NCOR1, NCOR2. Interacts with ATN1 (via its N-terminus); the interaction enhances the transcriptional repression. Interacts (via its N-terminus) with ZBTB16; the interaction increases the transcription repression activity of ZBTB16 (PubMed:10688654). AML1-MTG8/ETO fusion protein interacts with CBFB. AML1-MTG8/ETO is part of a stable transcription factor complex AETFC in leukemic cells; AETFC formation seems to be involved in recruitment of EP300. AML1-MTG8/ETO nervy homology region 2-mediated oligomerization is proposed to be homotypic, required for AML1-MTG8/ETO-mediated transformation of primary hematopoietic cells and is required for AML1-MTG8/ETO interaction with TCF12. Colocalizes with ATN1 in discrete nuclear dots. Most abundantly expressed in brain. Lower levels in lung, heart, testis and ovary. The TAFH domain mediates interaction with transcription regulators. Nervy homology region 2 (NHR2) mediates homo- and possibly heterotypic oligomerization by forming a four-helix bundle tetrameric structure. A chromosomal aberration involving RUNX1T1 is a cause of acute myeloid leukemia (AML-M2). Translocation t(8;21)(q22;q22) with RUNX1/AML1. Belongs to the CBFA2T family. Truncated N-terminus. Truncated N-terminus.