BRCC3 Knockout HAP1 Cell Line

The choice depends on whether you are studying BRCC3 (BRCA1/BRCA2-containing complex subunit 3, BRCC36)'s role as a K63-specific deubiquitinase or modeling its functions in BRCA1-A complex DNA damage response and NLRP3 inflammasome regulation. The Knockout line is the standard tool for asking whether BRCC3 is required for these processes — BRCC3 is a JAMM-family deubiquitinase that specifically cleaves K63-linked ubiquitin chains; BRCC3 functions in two major complexes: (1) the BRCA1-A complex (with BRCA1, BRCC36, ABRAXAS1, BRE, RAP80, NBA1) recruited to DNA damage sites; (2) the cytoplasmic BRISC complex (with ABRO1, BRE, NBA1) for NLRP3 inflammasome deubiquitination. Overexpression is useful for studying BRCC3 in heterologous expression contexts. For DNA repair and inflammasome research, the EDITGENE BRCC3 Knockout in HAP1 enables study of K63-specific deubiquitination biology. Rescue with wild-type or catalytically-dead BRCC3 (H122A in JAMM motif) enables structure-function studies. BRCC3 mutations have been characterized in moyamoya syndrome (intracranial vascular disease). The knockout is valuable for studying BRCA1-A complex biology, NLRP3 inflammasome regulation, and emerging BRCC3-targeted therapeutic approaches.

Primary applications: • K63-Ub deubiquitinase activity: K63-Ub chain processing analysis in BRCC3-null cells. • DNA damage response: BRCA1-A complex assembly and IR-induced foci formation (BRCA1, RAP80, ABRAXAS1 colocalization). • NLRP3 inflammasome: in heterologous inflammasome-relevant contexts, NLRP3 deubiquitination and activation analysis. • Moyamoya syndrome: rescue with patient-derived BRCC3 mutations for disease genotype-function studies. EDITGENE recommends this model for researchers investigating K63-specific deubiquitination, BRCA1-A complex biology, and NLRP3 inflammasome regulation.

Yes. BRCC3 rescue experiments require attention to JAMM deubiquitinase architecture: • Construct design: use a codon-modified BRCC3 sequence with a small C-terminal tag (FLAG, HA). BRCC3 has JAMM/MPN+ domain with catalytic histidine — preserve all elements. • Catalytically-dead rescue: H122A mutation in the JAMM motif abolishes deubiquitinase activity. • BRISC vs BRCA1-A complex rescue: full-length BRCC3 reconstitutes both complexes; complex-specific rescue requires partner expression analysis. • Functional readout: rescue should restore K63-Ub chain processing and BRCA1-A complex IR-induced foci formation. 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.