SETMAR Knockout HAP1 Cell Line

The choice depends on whether you are studying SETMAR (Metnase)'s role as a histone H3K36 methyltransferase fused to a transposase-derived domain or its functions in DNA double-strand break repair. The Knockout line is the standard tool for asking whether SETMAR is required for these activities — SETMAR is a primate-specific gene formed by fusion of a SET histone methyltransferase domain with a Mariner transposase-derived domain, functioning in non-homologous end joining and HR repair pathway regulation. Overexpression is useful for studying SETMAR's reported roles in chemotherapy resistance. For DNA repair research, the EDITGENE SETMAR Knockout in HAP1 enables study of this unique fusion enzyme's contributions to genome stability. Rescue with wild-type, catalytically-dead (SET domain), or transposase-domain-mutated SETMAR enables dissection of the dual functional domains. SETMAR has emerging interest as a chemotherapy resistance modifier and potential cancer target.

Primary applications: • H3K36me2 deposition: histone H3K36 di-methylation analysis by Western blot and ChIP-seq at DSB sites and gene bodies. • DNA repair efficiency: γH2AX foci kinetics, DSB repair efficiency (NHEJ/HR reporter assays) following damage induction. • Chemotherapy sensitivity: dose-response analysis for topoisomerase inhibitors (etoposide, doxorubicin) and other DNA damaging agents given SETMAR's reported chemoresistance role. • Transposase activity: in vitro 5'-flap endonuclease and DNA strand transfer activity assays for the Mariner-derived domain. EDITGENE recommends this model for researchers investigating SETMAR biology, DNA damage repair, and chemotherapy resistance mechanisms.

Yes. SETMAR rescue experiments require attention to its bipartite functional architecture: • Construct design: use a codon-modified SETMAR sequence with a small C-terminal tag (FLAG, HA). SETMAR contains an N-terminal SET methyltransferase domain and C-terminal Mariner transposase-derived domain — both are functional. • SET-dead rescue: catalytic SET domain mutations abolish methyltransferase activity and serve as specificity control for H3K36 methylation function. • Transposase-dead rescue: catalytic residue mutations in the Mariner domain abolish DNA cleavage/strand transfer activity, enabling dissection of DNA-processing functions. • Functional readout: rescue should restore H3K36me2 deposition at DSB sites and DNA repair efficiency. HAP1-specific considerations: • Diploidization: HAP1 cells gradually diploidize during extended culture — confirm ploidy by flow cytometry at the time of phenotypic assay. • Integration site sensitivity: position effects on transgene expression are more pronounced in near-haploid backgrounds; generating multiple independent rescue clones is strongly recommended. • Transduction efficiency: HAP1 transduces with lentivirus at moderate efficiency — increase MOI compared to standard immortalized lines.