HPS1 Knockout Cell Line (A549)

The choice depends on whether you are studying HPS1's role as a BLOC-3 complex subunit or modeling Hermansky-Pudlak syndrome type 1 with its characteristic pulmonary fibrosis. The Knockout line is the standard tool for asking whether HPS1 is required for these processes — HPS1 partners with HPS4 to form the BLOC-3 (biogenesis of lysosome-related organelles complex 3), a GEF for Rab32/Rab38 that controls the formation and maturation of lysosome-related organelles (LROs) including melanosomes, platelet dense granules, and lung lamellar bodies. Overexpression is useful for studying HPS1 in heterologous expression contexts. For pulmonary disease research, the EDITGENE HPS1 Knockout in A-549 is highly relevant — A-549 is an alveolar type II cell-like cancer line, and HPS1 mutations cause Hermansky-Pudlak syndrome type 1 with characteristic pulmonary fibrosis (HPS-related interstitial pneumonia, HPSIP) due to defective alveolar type II cell lamellar body biogenesis and surfactant secretion. Rescue with wild-type or HPS4-binding-deficient HPS1 enables structure-function studies. The knockout is valuable for studying HPS pulmonary fibrosis mechanisms and emerging HPS1-related therapeutic approaches.

Primary applications: • BLOC-3 complex assembly: HPS1-HPS4 heterodimer formation and Rab32/Rab38 GEF activity analysis. • Lung lamellar body biogenesis: in alveolar type II-relevant context, lamellar body morphology and surfactant secretion analysis given A-549's alveolar type II origin. • HPS pulmonary fibrosis modeling: rescue with patient-derived HPS1 mutations for genotype-function studies of Hermansky-Pudlak syndrome interstitial pneumonia. • Lysosome-related organelle biology: in melanocyte- or platelet-relevant contexts, LRO biogenesis studies. EDITGENE recommends this model for researchers investigating HPS1 biology, BLOC-3 complex function, and Hermansky-Pudlak syndrome pulmonary fibrosis mechanisms.

Yes. HPS1 rescue experiments require attention to BLOC-3 complex assembly: • Construct design: use a codon-modified HPS1 sequence with a small C-terminal tag (FLAG, HA). HPS1 has N-terminal HPS4-interaction region and C-terminal Rab32/Rab38 GEF region — preserve all elements. • HPS4-binding-deficient rescue: HPS4-interaction surface mutations disrupt BLOC-3 complex formation. • HPS mutation rescue: patient-derived HPS1 mutations (e.g., founder Puerto Rican 16-bp duplication) enable disease genotype-function studies. • Functional readout: rescue should restore lysosome-related organelle biogenesis (in melanocyte/platelet contexts) and surfactant lamellar body formation in alveolar contexts. A-549 transduces efficiently with lentivirus and supports stable rescue line generation.