CASK Knockout HAP1 Cell Line

The choice depends on whether you are studying CASK (calcium/calmodulin-dependent serine protein kinase)'s role as a MAGUK scaffold protein or modeling its functions in MICPCH syndrome and FG syndrome 4. The Knockout line is the standard tool for asking whether CASK is required for these processes — CASK is an unusual MAGUK family member with N-terminal CaMKII-like kinase domain (Mg²⁺-independent kinase activity), L27 domains, PDZ, SH3, and GUK domains; CASK scaffolds synaptic and epithelial junction complexes, binds neurexin and SAP97; CASK has reported atypical kinase activity that does not require Mg²⁺. Overexpression is useful for studying CASK in heterologous expression contexts. For neurodevelopmental disease research, the EDITGENE CASK Knockout in HAP1 is highly informative — CASK X-linked mutations cause microcephaly with pontine and cerebellar hypoplasia (MICPCH; OMIM 300749) and FG syndrome 4 (FGS4; intellectual disability syndrome). Rescue with wild-type or kinase-dead CASK enables structure-function studies. The knockout is valuable for studying MAGUK scaffold biology, synaptic complex assembly, and emerging CASK-related neurodevelopmental disorder mechanisms.

Primary applications: • MAGUK scaffold assembly: SAP97, neurexin partnership analysis in CASK-null cells. • MICPCH/FG syndrome modeling: rescue with patient-derived CASK mutations for genotype-function studies. • Atypical kinase activity: in vitro analysis of CASK's Mg²⁺-independent kinase activity. • Synaptic complex biology: in heterologous synaptic-relevant contexts, CASK-mediated synaptic scaffold assembly. EDITGENE recommends this model for researchers investigating MAGUK scaffold biology and CASK-related neurodevelopmental disorder mechanisms.

Yes. CASK rescue experiments require attention to MAGUK scaffold architecture: • Construct design: use a codon-modified CASK sequence with a small C-terminal tag (FLAG, HA). CASK has N-terminal CaMKII-like kinase domain, two L27 domains, PDZ, SH3, and GUK domains — preserve all elements. • Kinase-dead rescue: D146A or kinase domain catalytic residue mutations abolish CASK's unusual Mg²⁺-independent kinase activity. • PDZ-mutant rescue: PDZ domain mutations disrupt neurexin and other PDZ-binding-motif interactions. • MICPCH/FG syndrome mutation rescue: patient-derived CASK mutations enable disease genotype-function studies. • Functional readout: rescue should restore MAGUK scaffold assembly with neurexin and SAP97. 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.