Transcriptional corepressor that mediates the transcriptional repression activity of some nuclear receptors by promoting chromatin condensation, thus preventing access of the basal transcription (PubMed:10077563, PubMed:10097068, PubMed:18212045, PubMed:20812024, PubMed:22230954, PubMed:23911289). Acts by recruiting chromatin modifiers, such as histone deacetylases HDAC1, HDAC2 and HDAC3 (PubMed:22230954). Required to activate the histone deacetylase activity of HDAC3 (PubMed:22230954). Involved in the regulation BCL6- dependent of the germinal center (GC) reactions, mainly through the control of the GC B-cells proliferation and survival (PubMed:18212045, PubMed:23911289). Recruited by ZBTB7A to the androgen response elements/ARE on target genes, negatively regulates androgen receptor signaling and androgen-induced cell proliferation (PubMed:20812024). {ECO:0000269|PubMed:10077563, ECO:0000269|PubMed:10097068, ECO:0000269|PubMed:18212045, ECO:0000269|PubMed:20812024, ECO:0000269|PubMed:22230954, ECO:0000269|PubMed:23911289}. [Isoform 1]: Isoform 1 and isoform 4 have different affinities for different nuclear receptors. . [Isoform 4]: Isoform 1 and isoform 4 have different affinities for different nuclear receptors. . This is the function of Ensembl gene identifier ENSG00000196498 (NCOR2, nuclear receptor corepressor 2).