TTBK2 Knockout HAP1 Cell Line

The choice depends on whether you are studying TTBK2's role in ciliogenesis or modeling spinocerebellar ataxia type 11. The Knockout line is the standard tool for both — TTBK2 mutations cause SCA11 through impaired ciliogenesis, and TTBK2 KO recapitulates the cilia assembly defect. Overexpression is useful for testing whether elevated TTBK2 activity is sufficient to drive enhanced cilia formation or for in vitro kinase assays. For ciliogenesis research, the EDITGENE Knockout line in HAP1 is highly informative — TTBK2 functions at the distal centriole to initiate ciliogenesis, and its complete loss prevents cilia formation. Rescue with wild-type, kinase-dead, or SCA11 truncation-mutant TTBK2 is essential for distinguishing kinase activity from scaffolding functions and modeling disease genetics.

Primary applications: • Ciliogenesis assays: serum starvation-induced primary cilia formation measured by Arl13b, acetylated tubulin, or IFT88 immunofluorescence. • CP110 removal: imaging-based analysis of CP110 displacement from the mother centriole — TTBK2's principal characterized molecular function in ciliogenesis initiation. • SCA11 disease modeling: rescue with SCA11-associated TTBK2 truncation mutants to study dominant-negative or haploinsufficiency mechanisms. • Hedgehog signaling: GLI activity and Hedgehog pathway responsiveness, given primary cilia's role in Hedgehog signal transduction. EDITGENE recommends this model for researchers investigating ciliogenesis, spinocerebellar ataxia type 11, and cilium-dependent signaling pathways.

Yes. TTBK2 rescue experiments require attention to kinase activity and centriolar targeting: • Construct design: use a codon-modified TTBK2 sequence with a C-terminal tag (FLAG, HA). TTBK2 is a large kinase (~1,244 amino acids); full-length cloning requires careful vector selection. • Kinase-dead rescue: the D163A mutation abolishes kinase activity and is the standard specificity control for distinguishing catalytic from scaffolding functions in ciliogenesis. • SCA11 truncation rescue: SCA11-associated truncation mutants (typically C-terminal truncations) can be introduced to study dominant-negative or haploinsufficiency mechanisms. • Functional readout: rescue should restore primary cilia formation (Arl13b/acetylated tubulin staining) and CP110 removal from the mother centriole. 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.