PSMB10 Knockout HAP1 Cell Line

The choice depends on whether you are studying PSMB10 (MECL-1, β2i)'s role as a catalytic subunit of the immunoproteasome or its specific contributions distinct from LMP7 (β5i) and LMP2 (β1i). The Knockout line is appropriate for asking whether MECL-1 is required for immunoproteasome-mediated antigen processing and inflammatory responses — MECL-1 replaces β2 of the standard proteasome and contributes the trypsin-like catalytic activity of the immunoproteasome. Overexpression is useful for immunoproteasome assembly studies. For immunoproteasome research, the EDITGENE PSMB10 Knockout in HAP1 complements the parallel PSMB8 Knockout (also available) — combined or comparative analyses provide comprehensive immunoproteasome subunit dissection. Note that complete immunoproteasome inactivation requires loss of all three immune subunits (LMP2/β1i, MECL-1/β2i, LMP7/β5i). Rescue with wild-type or catalytically-dead MECL-1 is the standard specificity control.

Primary applications: • Immunoproteasome trypsin-like activity: trypsin-like activity assays using fluorogenic substrates to assess MECL-1-dependent peptide cleavage. • Combined immunoproteasome studies: parallel analysis with the PSMB8 (LMP7) Knockout (also available) for paralog-specific immunoproteasome dissection. • Antigen processing: MHC class I peptide repertoire analysis with IFN-γ-induced immunoproteasome to characterize MECL-1-dependent peptide generation. • Inflammatory disease modeling: cytokine production analysis given immunoproteasome's role in inflammatory responses. EDITGENE recommends this model for researchers investigating MECL-1-specific immunoproteasome biology and antigen processing mechanisms.

Yes. MECL-1 rescue experiments require attention to immunoproteasome assembly: • Construct design: use a codon-modified PSMB10 sequence with a small C-terminal tag (FLAG, HA, very small only). MECL-1 is incorporated as a precursor that undergoes autocatalytic activation. • Catalytically-dead rescue: the T1A mutation abolishes trypsin-like activity and is the standard specificity control. • Combined immunoproteasome analysis: rescue with single subunits in single- versus combined immunoproteasome knockouts dissects subunit-specific functions. • Functional readout: rescue should restore trypsin-like activity (Bz-VGR-AMC or LRR-AMC substrates) and immunoproteasome assembly. 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.