KEAP1 Antibody – Rabbit

The nuclear factor-like 2 (NRF2) transcriptional activator binds antioxidant response elements (ARE) of target gene promoter regions to regulate expression of oxidative stress response genes. Under basal conditions, the NRF2 inhibitor INrf2 (also called KEAP1) binds and retains NRF2 in the cytoplasm where it can be targeted for ubiquitin-mediated degradation (1). Small amounts of constitutive nuclear NRF2 maintains cellular homeostasis through regulation of basal expression of antioxidant response genes. Following oxidative or electrophilic stress, KEAP1 releases NRF2, thereby allowing the activator to translocate to the nucleus and bind to ARE-containing genes (2). The coordinated action of NRF2 and other transcription factors mediates the response to oxidative stress (3). Altered expression of NRF2 is associated with chronic obstructive pulmonary disease (COPD) (4). NRF2 activity in lung cancer cell lines directly correlates with cell proliferation rates, and inhibition of NRF2 expression by siRNA enhances anti-cancer drug-induced apoptosis (5). The NRF2 repressor KEAP1 contains an amino terminal BTB/POZ domain and a carboxyl terminal KELCH domain (6, 7). The KELCH domain is required for interacting with NRF2 and the BTB/POZ domain functions in binding Cul3 E3 ubiquitin ligase (8-10). Under normal conditions, the complex leads to the cytoplasmic sequestration and ubiquitin-mediated proteasomal degradation of NRF2. Electrophilic modification of KEAP1 leads to disassociation of the NRF2/KEAP1 complex. KEAP1 also targets the down regulation of NF-kappaB activity by targeting IKKbeta degradation (11).

1. Cullinan, S.B. et al. (2004) Mol Cell Biol 24, 8477-86. 2. Nguyen, T. et al. (2005) J BiolChem 280, 32485-92. 3. Jaiswal, A.K. (2004) Free RadicBiol Med 36, 1199-207. 4. Suzuki, M. et al. (2008) Am J Respir Cell MolBiol 39, 673-82. 5. Homma, S. et al. (2009) Clin Cancer Res 15, 3423-32. 6. Itoh, K. et al. (1999) Genes Dev 13, 76-86. 7. Dhakshinamoorthy, S. and Jaiswal, A.K. (2001) Oncogene 20, 3906-17. 8. Furukawa, M. and Xiong, Y. (2005) Mol Cell Biol 25, 162-71. 9. Zhang, D.D. et al. (2004) Mol Cell Biol 24, 10941-53. 10. Kobayashi, A. et al. (2004) Mol Cell Biol 24, 7130-9. 11. Lee, D.F. et al. (2009) Mol Cell 36, 131-40.

Small volumes of anti-KEAP1 antibody vial(s) may occasionally become entrapped in the seal of the product vial during shipment and storage. If necessary, briefly centrifuge the vial on a tabletop centrifuge to dislodge any liquid in the container`s cap. Certain products may require to ship with dry ice and additional dry ice fee may apply.

MBS8501631 is an antibody targeting KEAP1. Also known as KEAP1 Antibody. Reactive in Human, Mouse, Rat. Host: Rabbit.