HELLS Knockout Cell Line (HEK293)

The choice depends on whether you are studying HELLS (LSH, lymphoid-specific helicase)'s role as a chromatin remodeler supporting DNA methylation or modeling ICF syndrome 4 (immunodeficiency-centromeric instability-facial anomalies). The Knockout line is the standard tool for asking whether HELLS is required for these processes — HELLS is a SNF2-family ATP-dependent chromatin remodeler that cooperates with DNMT3A/3B to establish DNA methylation at pericentric heterochromatin, transposable elements, and other target loci. HELLS loss results in genome-wide DNA hypomethylation. Overexpression is useful for studying HELLS in heterologous expression contexts. For chromatin biology research, the EDITGENE HELLS Knockout in HEK293 is highly informative — HELLS biallelic loss-of-function mutations cause ICF syndrome 4 (immunodeficiency-centromeric instability-facial anomalies, autosomal recessive) characterized by pericentric heterochromatin demethylation. Rescue with wild-type or ATPase-deficient HELLS is the standard specificity control. The knockout is valuable for studying DNA methylation establishment, pericentric heterochromatin biology, and emerging HELLS-related cancer epigenetics — HELLS is overexpressed in multiple cancers and may be a therapeutic target.

Primary applications: • DNA methylation: whole-genome bisulfite sequencing or pericentric heterochromatin methylation analysis in HELLS-null cells. • ICF syndrome modeling: rescue with patient-derived HELLS mutations for genotype-function studies of ICF syndrome 4. • Pericentric heterochromatin: chromocenter morphology and pericentric methylation given HELLS's role in heterochromatin organization. • Cancer epigenetics: HELLS overexpression studies in cancer-relevant contexts given its emerging oncogenic role. EDITGENE recommends this model for researchers investigating DNA methylation establishment, HELLS-DNMT3 cooperation, ICF syndrome mechanisms, and HELLS-related cancer epigenetics.

Yes. HELLS rescue experiments require attention to SNF2 helicase architecture: • Construct design: use a codon-modified HELLS sequence with a small C-terminal tag (FLAG, HA). HELLS has N-terminal coiled-coil, central SNF2 ATPase domain (helicase superfamily II), and C-terminal regulatory region — preserve all elements. • ATPase-deficient rescue: K254R or K237R mutations in the Walker A motif abolish ATP hydrolysis and serve as the standard specificity control. • ICF mutation rescue: patient-derived HELLS mutations enable disease genotype-function studies of ICF syndrome 4. • Functional readout: rescue should restore DNA methylation at pericentric heterochromatin and DNMT3B cooperation. HEK293 transduces efficiently with lentivirus and supports stable rescue line generation.