YY1 and neoplasm: Analysis of curated PPI databases such as STRING (https://string-db.org/), GPS-Prot (http://gpsprot.org/), BIOGRID (https://thebiogrid.org/), MINT (https://mint.bio.uniroma2.it/) and HINT (http://hint.yulab.org/) revealed that YY1 interacts with several proteins and cofactors and reported to regulate transcription, chromatin organization, histone acetylation & deacetylation, epigenetic modification, DNA repair, ubiquitination, apoptosis, cell proliferation and tumor suppression/promotion.