Probable corepressor protein, which probably participates in the transcriptional repression of the presenilin protein hop-1 (PubMed:12381669). Probably acts via the formation of a multiprotein complex that deacetylates and demethylates specific sites on histones (PubMed:12381669). Acts redundantly with the transcriptional repressor lin-35 to play a role in vulval morphogenesis and promote germline proliferation (PubMed:17070797). Probably part of a large repressor complex. Interacts with histone demethylase spr-5/lsd-1. Loss of function results in a suppression of sel-12 mutant phenotypes, possibly by up-regulating hop-1 expression (PubMed:12411496). Double knockout with lin-35 results in defects in growth, vulval morphogenesis, somatic gonad development and fertility (PubMed:17070797). Belongs to the CoREST family.