PLCB4 Knockout HAP1 Cell Line

The choice depends on whether you are studying PLCB4's role as a Gq-coupled GPCR-activated phospholipase C-β isoform or modeling auriculocondylar syndrome type 2 (ACS2). The Knockout line is the standard tool for asking whether PLCβ4 is required for Gαq-coupled receptor signaling — PLCβ family members (PLCβ1-4) hydrolyze PIP2 downstream of Gq-coupled GPCRs through Gαq direct binding. Overexpression is useful for studying PLCβ4 in heterologous expression contexts or for testing disease-associated mutations. For Gq-GPCR signaling research, the EDITGENE PLCB4 Knockout in HAP1 enables study of PLCβ4-specific Gq-coupled receptor downstream signaling. PLCB4 mutations cause auriculocondylar syndrome type 2, characterized by craniofacial abnormalities — disease variant rescue enables genotype-function studies. PLCβ1-3 paralog expression analysis aids interpretation. Rescue with wild-type, lipase-dead, or ACS2-associated mutant PLCβ4 enables comprehensive structure-function studies.

Primary applications: • Gq-GPCR downstream signaling: PIP2 hydrolysis, IP3 generation, and intracellular Ca²⁺ mobilization following Gq-coupled receptor stimulation (e.g., M1 muscarinic, α1-adrenergic, ET1 receptors) in PLCB4-null cells. • Auriculocondylar syndrome modeling: rescue with patient-derived PLCB4 mutations for genotype-function correlation studies of this craniofacial development disorder. • PLCβ paralog studies: PLCB1, PLCB2, PLCB3 expression analysis to interpret PLCβ4-specific functions. • Endothelin signaling: ET-1 receptor downstream signaling given PLCB4's documented role in ET1-mediated craniofacial development. EDITGENE recommends this model for researchers investigating Gq-GPCR signaling, craniofacial development biology, and auriculocondylar syndrome mechanisms.

Yes. PLCβ4 rescue experiments require attention to Gαq coupling: • Construct design: use a codon-modified PLCB4 sequence with a small C-terminal tag (FLAG, HA). PLCβ4 has PH domain, EF hands, X-Y catalytic core, C2 domain, and C-terminal Gαq-binding region — preserve all elements (particularly the C-terminal extension required for Gαq interaction). • Lipase-dead rescue: catalytic residue mutations in the X-Y core abolish phospholipase activity and serve as the standard specificity control. • Gαq-binding-deficient rescue: C-terminal region mutations disrupt Gαq interaction without affecting intrinsic catalysis. • ACS2 mutation rescue: patient-derived PLCB4 mutations enable disease genotype-function studies. • Functional readout: rescue should restore Gq-coupled GPCR-stimulated PIP2 hydrolysis and downstream Ca²⁺ signaling. 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.