PHKG2 Knockout HAP1 Cell Line

The choice depends on whether you are studying PHKG2 (phosphorylase b kinase γ2 catalytic subunit)'s role in glycogen phosphorylase activation or modeling glycogen storage disease type IXc (autosomal recessive liver phosphorylase kinase deficiency). The Knockout line is the standard tool for asking whether PHKG2 is required for phosphorylase kinase activity — PHKG2 is the liver-testis catalytic subunit of phosphorylase kinase (in contrast to muscle-specific PHKG1), which phosphorylates and activates glycogen phosphorylase. Overexpression is useful for studying PHKG2 in heterologous expression contexts or for testing disease-associated mutations. For glycogen metabolism research, the EDITGENE PHKG2 Knockout in HAP1 enables study of liver-type phosphorylase kinase activity. PHKG2 mutations cause autosomal recessive GSD IXc — disease variant rescue enables genotype-function studies. Rescue with wild-type or kinase-dead PHKG2 is the standard specificity control.

Primary applications: • Phosphorylase kinase activity: in vitro phosphorylase kinase activity assays using glycogen phosphorylase substrate to characterize PHKG2-dependent kinase activity. • Glycogen metabolism: cellular glycogen content, phospho-glycogen phosphorylase, and glycogenolysis assays in the PHKG2-null context. • GSD IXc disease modeling: rescue with patient-derived PHKG2 mutations for genotype-function correlation studies. • Liver-specific phosphorylase kinase biology: characterization of liver-type phosphorylase kinase functions distinct from muscle PHKG1. EDITGENE recommends this model for researchers investigating glycogen storage disease type IXc mechanisms and liver-type phosphorylase kinase biology.

Yes. PHKG2 rescue experiments require attention to phosphorylase kinase architecture: • Construct design: use a codon-modified PHKG2 sequence with a small C-terminal tag (FLAG, HA). PHKG2 has N-terminal kinase domain and C-terminal regulatory CaM-binding region — preserve both elements. • Kinase-dead rescue: ATP-binding lysine mutation abolishes catalytic activity and serves as the standard specificity control. • GSD IXc mutation rescue: patient-derived PHKG2 mutations enable disease genotype-function studies. • Functional readout: rescue should restore glycogen phosphorylase activation and glycogenolysis. 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.