SQSTM1 / p62 Antibody

About the Target

SQSTM1/p62, a 62-kDa protein expressed widely across various tissues, is a key autophagy adaptor, binding ubiquitin and autophagy substrates through its ubiquitin-associated domain and LC3-interacting region, respectively. It regulates mitochondrial turnover via mitophagy and serves as a crucial regulator of mtDNA expression machinery, inducing mtDNA expression in renal tubular epithelial cells through p38-dependent upregulation of mitochondrial ribosomal protein L12 (MRPL12). Depending on the literature source, SQSTM1 may also be discussed as SQSTM1 / p62 and p62 (Sequestosome-1).

Reported cellular context includes cytoplasm, cytosol, endosome, and lysosome, which can matter when signal is compared across treatments or changing cell states. Following SQSTM1 across matched perturbations can help separate abundance effects from shifts in localization, complex assembly, or pathway state.

Research Context

SQSTM1 is commonly interpreted in the context of metabolism, autophagy, and cell signaling research, and readouts are often stronger when a study separates expression changes from compartment-level redistribution. When reported signal spans cytoplasm, cytosol, and endosome, a defined reference condition can make comparisons more interpretable across perturbations, passages, or replicate sets.

Consider these angles when interpreting target-level changes:

• apparent redistribution between cytoplasm, cytosol, and endosome across matched conditions
• responses linked to nutrient status, mitochondrial state, or metabolic rewiring
• interpretation alongside flux, cargo handling, or lysosomal context
• signal-dependent shifts after ligand, inhibitor, or growth-factor perturbation

Variant Considerations

If your project spans exploratory questions, the regular version offers a balanced option for establishing baseline signal behavior for SQSTM1. This can help when protocols evolve over time and the goal is to compare experiments using a stable reference workflow.

Standardize sampling time, control choice, and downstream analysis thresholds so apparent differences in SQSTM1 reflect biology rather than handling. When interpreting SQSTM1, it is often useful to decide early whether the main question is overall abundance, compartmental enrichment, or context-dependent redistribution.

For multi-run studies, a shared reference condition can keep SQSTM1 trends easier to compare across datasets. That kind of consistency is especially helpful when follow-up work expands to new perturbations, model systems, or longitudinal collections.