TP53 Knockout hTERT-RPE1 Cell Line

The choice depends on whether you are studying p53's tumor suppressor functions or using p53 loss as an enabling tool for studying genes whose loss is poorly tolerated in p53-competent backgrounds. The Knockout line is the standard tool for both — TP53 KO in hTERT-RPE1 generates one of the most widely-used 'p53-null' research tools, where the wild-type karyotype of RPE1 is combined with absence of the p53 stress response. Overexpression is useful for rescue experiments and for studying p53 isoform-specific functions. For research questions where p53 loss is the desired background condition — particularly for studying essential genes, replication stress, mitotic stress, or DNA damage tolerance — the EDITGENE TP53 Knockout in hTERT-RPE1 is an enabling research tool widely cited in functional genomics. Rescue with wild-type or mutant p53 is essential for confirming phenotype specificity and for genotype-function correlation studies of p53 hotspot mutations.

Primary applications: • p53-null background research tool: this line is widely used as an enabling background for studying genes whose loss is poorly tolerated in p53-competent cells — particularly chromosomal instability genes, mitotic regulators, and DNA damage response components. • DNA damage response: γH2AX dynamics, repair kinetics, and survival following ionizing radiation, replication stress, or genotoxic stress in the absence of p53. • p53 target gene analysis: comprehensive comparison of basal and stress-induced gene expression in p53-competent versus p53-null isogenic RPE1 backgrounds. • Therapeutic relevance: studies of how p53 status influences sensitivity to MDM2 inhibitors, DNA damaging agents, and stress-targeting therapeutics. EDITGENE recommends this model for researchers requiring a p53-null isogenic background for functional genomics, DNA damage response studies, and therapeutic sensitivity research.

Yes. p53 rescue experiments in hTERT-RPE1 are well-established as a fundamental research tool: • Construct design: use a codon-modified TP53 sequence with a small C-terminal tag (FLAG, HA). TP53 is sensitive to N-terminal modifications — the transactivation domain at the N-terminus must be preserved. • Hotspot mutation rescue: rescue with cancer-associated p53 mutations (R175H, R248W, R273H, R282W) is the standard approach for genotype-function correlation studies of dominant-negative and gain-of-function p53 mutants. • Transactivation-dead rescue: the L22Q/W23S mutation abolishes p53 transcriptional activity and serves as a specificity control for transcription-dependent versus transcription-independent functions. • Expression level: p53 levels are tightly regulated — overexpression beyond physiological levels triggers stress responses. Use inducible (Tet-On) systems titrated to endogenous levels for clean phenotypic interpretation. hTERT-RPE1 cells transduce efficiently with lentivirus and support both polyclonal and clonal rescue line generation; the diploid, near-normal karyotype is preserved through standard rescue protocols.