TASOR (transcription activation suppressor) is the central scaffold component of the HUSH (human silencing hub) complex, a multiprotein assembly that mediates epigenetic repression of mobile genetic elements 1. TASOR recruits MPHOSPH8 and PPHLN1 to target loci while coordinating association with SETDB1 (histone methyltransferase) and MORC2 (chr3 remodeler) to establish and maintain transcriptional silencing 2. The HUSH complex specifically represses LINE-1 retrotransposons and exogenous retroviruses by promoting H3K9me3 deposition and heterochromatin formation 3. Notably, HUSH-mediated silencing of L1 elements within introns of transcriptionally active genes can downregulate host gene expression 3. TASOR also mediates silencing of unintegrated retroviral DNA following recruitment by ZNF638 4. During DNA replication, TASOR interacts with DNA polymerase ε to establish asymmetric H3K9me3 distribution at head-on L1 elements, suppressing their expression in S phase 5. TASOR dysfunction impairs early embryonic development by compromising epiblast cell fitness and LINE-1 silencing 6. A paralogous HUSH2 complex containing TASOR2 demonstrates functional specialization, with TASOR-containing HUSH complexes competing with TASOR2-based HUSH2 for shared subunits to coordinate retroelement silencing with immune regulation 7.