Product Pathways - Apoptosis
SQSTM1/p62 Antibody #5114
|W||H M R Mk||Endogenous||60||Rabbit|
Reactivity Key: H=Human M=Mouse R=Rat Mk=Monkey
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.
Specificity / Sensitivity
SQSTM1/p62 Antibody detects endogenous levels of total SQSTM1/p62 protein.
Source / Purification
Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Gly410 of human SQSTM1/p62 protein. Antibodies are purified by protein A and peptide affinity chromatography.
Western blot analysis of extracts from various cell lines using SQSTM1/p62 Antibody.
Sequestosome 1 (SQSTM1, p62) is a ubiquitin binding protein involved in cell signaling, oxidative stress, and autophagy (1-4). It was first identified as a protein that binds to the SH2 domain of p56Lck (5), and independently found to interact with PKCζ (6,7). SQSTM1 was subsequently found to interact with ubiquitin, providing a scaffold for several signaling proteins and triggering degradation of proteins through the proteasome or lysosome (8). Interaction between SQSTM1 and TRAF6 leads to the K63-linked polyubiquitination of TRAF6 and subsequent activation of the NF-κB pathway (9). Protein aggregates formed by SQSTM1 can be degraded by the autophagosome (4,10,11). SQSTM1 binds autophagosomal membrane protein LC3/Atg8, bringing SQSTM1-containing protein aggregates to the autophagosome (12). Lysosomal degradation of autophagosomes leads to a decrease in SQSTM1 levels during autophagy; conversely, autophagy inhibitors stabilize SQSTM1 levels. Studies have demonstrated a link between SQSTM1 and oxidative stress. SQSTM1 interacts with KEAP1, which is a cytoplasmic inhibitor of NRF2, a key transcription factor involved in cellular responses to oxidative stress (3). Thus, accumulation of SQSTM1 can lead to an increase in NRF2 activity.
- Kirkin, V. et al. (2009) Mol Cell 34, 259-69.
- Seibenhener, M.L. et al. (2007) FEBS Lett 581, 175-9.
- Komatsu, M. et al. (2010) Nat Cell Biol 12, 213-23.
- Bjørkøy, G. et al. (2006) Autophagy 2, 138-9.
- Joung, I. et al. (1996) Proc Natl Acad Sci USA 93, 5991-5.
- Sanchez, P. et al. (1998) Mol Cell Biol 18, 3069-80.
- Puls, A. et al. (1997) Proc Natl Acad Sci USA 94, 6191-6.
- Vadlamudi, R.K. et al. (1996) J Biol Chem 271, 20235-7.
- Wooten, M.W. et al. (2005) J Biol Chem 280, 35625-9.
- Bjørkøy, G. et al. (2005) J Cell Biol 171, 603-14.
- Komatsu, M. et al. (2007) Cell 131, 1149-63.
- Pankiv, S. et al. (2007) J Biol Chem 282, 24131-45.
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For Research Use Only. Not For Use In Diagnostic Procedures.