Phospho-JUN (Ser63) antibodies are polyclonal, rabbit-derived IgG antibodies designed to recognize c-Jun exclusively when phosphorylated at Ser63. Key features include:
These antibodies exhibit specificity validated through peptide-blocking assays, ensuring recognition only when Ser63 is phosphorylated .
c-Jun, encoded by the JUN gene (UniProt: P05412), is a proto-oncoprotein forming AP-1 transcription factor dimers. Phosphorylation at Ser63 enhances its transcriptional activity, influencing processes like:
Ser63 phosphorylation is mediated by JNK isoforms (e.g., in response to anisomycin or TNFα) and ERK1/2 (e.g., in response to TPA or EGF) .
Post-translational modifications (e.g., phosphorylation by GSK3β or PLK3) regulate c-Jun’s DNA-binding affinity and stability .
Signaling Pathway Analysis:
Functional Studies:
The Meso Scale Discovery (MSD) platform employs this antibody for quantitative phospho-c-Jun detection, offering advantages over traditional Western blotting:
Dynamic Range: Linear detection across lysate titrations (0.63–10 µg) .
Specificity: Minimal cross-reactivity with non-phosphorylated c-Jun .