The poly(A)-binding protein cytoplasmic 1 (PABPC1) is a highly conserved RNA-binding protein critical for post-transcriptional gene regulation. It binds the poly(A) tails of eukaryotic mRNAs, facilitating mRNA stability, translation initiation, and deadenylation. PABPC1 interacts with translation machinery components like eIF4G and the cytoplasmic deadenylase complex, playing a central role in mRNA circularization and translation efficiency. Its expression is ubiquitous across tissues, with elevated levels in cells requiring high protein synthesis, such as neurons and rapidly proliferating cells.
Antibodies targeting PABPC1 are essential tools for studying mRNA metabolism, translational control, and stress granule dynamics. They are widely used in techniques like Western blotting, immunofluorescence, and immunoprecipitation to assess PABPC1 localization, expression changes, or protein-RNA interactions. Dysregulation of PABPC1 has been implicated in cancers, viral infections (e.g., enteroviruses targeting its function), and neurodegenerative diseases like amyotrophic lateral sclerosis (ALS). Research using PABPC1 antibodies has also uncovered its role in cellular stress responses, such as forming cytoplasmic aggregates during oxidative stress or viral-induced translation shutdown. These antibodies are vital for exploring PABPC1’s molecular interactions and validating knockdown/knockout models in disease mechanisms.