INPP5E Knockout HAP1 Cell Line

The choice depends on whether you are studying INPP5E (inositol polyphosphate-5-phosphatase E)'s role as a ciliary phosphoinositide phosphatase or modeling Joubert syndrome and MORM syndrome. The Knockout line is the standard tool for asking whether INPP5E is required for these processes — INPP5E is a phosphoinositide 5-phosphatase that hydrolyzes PI(4,5)P2 to PI(4)P and PI(3,4,5)P3 to PI(3,4)P2; INPP5E is uniquely localized to the primary cilium membrane via prenylation, where it maintains the ciliary phosphoinositide composition (low PI(4,5)P2, high PI(4)P). Overexpression is useful for studying INPP5E in heterologous expression contexts. For ciliopathy research, the EDITGENE INPP5E Knockout in HAP1 is highly informative — INPP5E mutations cause Joubert syndrome type 1 (JBTS1, cerebellar vermis hypoplasia, retinal dystrophy) and MORM syndrome (mental retardation, truncal obesity, retinal dystrophy, micropenis). Rescue with wild-type or phosphatase-dead INPP5E enables disease genotype-function studies. The knockout is valuable for studying ciliary phosphoinositide biology, Hedgehog signaling (ciliary phosphoinositides regulate Hedgehog pathway), and emerging Joubert syndrome therapeutic strategies.

Primary applications: • Ciliary phosphoinositide composition: PI(4,5)P2 and PI(4)P imaging in primary cilia using phosphoinositide-specific biosensors (TUBBY-PH, GFP-2xPH-PLCδ). • Hedgehog signaling: SMO ciliary localization and GLI target gene (PTCH1, GLI1) expression analysis following SHH stimulation given ciliary phosphoinositide regulation of Hedgehog pathway. • Joubert syndrome modeling: rescue with patient-derived INPP5E mutations for genotype-function studies of cerebellar vermis hypoplasia ciliopathy. • Ciliary biology: cilium length, frequency, and trafficking analysis given INPP5E's ciliary localization. EDITGENE recommends this model for researchers investigating ciliary phosphoinositide biology, Joubert syndrome mechanisms, and Hedgehog pathway-ciliopathy interactions.

Yes. INPP5E rescue experiments require attention to ciliary targeting: • Construct design: use a codon-modified INPP5E sequence with a small N-terminal tag (FLAG, HA) — INPP5E has C-terminal CaaX prenylation motif (farnesylation) for membrane attachment, so C-terminal tags will disrupt prenylation and ciliary localization. • Ciliary localization validation: confirm primary cilium localization by co-staining with cilium markers (acetylated tubulin, ARL13B) before functional assays. • Phosphatase-dead rescue: catalytic residue mutations in the phosphatase domain abolish PI(4,5)P2 hydrolysis and serve as the standard specificity control. • Joubert mutation rescue: patient-derived INPP5E mutations enable disease genotype-function studies of ciliopathy. • Functional readout: rescue should restore ciliary PI(4,5)P2 hydrolysis and SHH-induced Hedgehog pathway activation. 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.