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Immunofluorescent analysis of Proteasome 11S REG beta (green) showing staining in the cytoplasm and nucleus of Neuro-2a cells. Formalin-fixed cells were permeabilized with 0.1% Triton X-100 in TBS for 5-10 minutes and blocked with 3% BSA-PBS for 30 minutes at room temperature. Cells were probed with a Proteasome 11S REG beta polyclonal antibody (Product # PA1-976) in 3% BSA-PBS at a dilution of 1:50 and incubated overnight at 4 °C in a humidified chamber. Cells were washed with PBST and incubated with a DyLight-conjugated secondary antibody in PBS at room temperature in the dark. F-actin (red) was stained with a flourescent red phalloidin and nuclei (blue) were stained with Hoechst or DAPI. Images were taken at a magnification of 60x.
|Tested species reactivity||Human, Mouse|
|Host / Isotype||Rabbit / IgG|
|Immunogen||Synthetic Peptide: M(1) A K P C G V R L S G E A R(14)|
|Purification||Ammonium sulfate precipitation|
|Contains||0.05% sodium azide|
|Storage Conditions||-20° C, Avoid Freeze/Thaw Cycles|
|Tested Applications||Dilution *|
|Western Blot (WB)||1:1,000|
* Suggested working dilutions are given as a guide only. It is recommended that the user titrate the product for use in their own experiment using appropriate negative and positive controls.
PA1-976 detects recombinant human and mouse proteasome 11S REG beta. This antibody does not detect endogenous levels of proteasome 11S REG beta nor does it detect other 11S REG subunits.
PA1-976 has been successfully used in Western blot and ICC/IF procedures. By Western blot, this antibody detects an ~28 kDa protein representing recombinant human proteasome 11S REG beta.
PA1-976 immunizing peptide corresponds to amino acid residues 1-14 from human proteasome 11S REG beta protein. This peptide (PEP-158) is available for use in neutralization and control experiments.
Proteolytic degradation is critical to the maintenance of appropriate levels of short-lived and regulatory proteins as important and diverse as those involved in cellular metabolism, heat shock and stress response, antigen presentation, modulation of cell surface receptors and ion channels, cell cycle regulation, transcription, and signalling factors. The ubiquitin-proteasome pathway deconstructs most proteins in the eukaryotic cell cytosol and nucleus. Others are degraded via the vacuolar pathway which includes endosomes, lysosomes, and the endoplasmic reticulum.
The 26S proteasome is an ATP-dependent, multisubunit (~31), barrel-shaped molecular machine with an apparent molecular weight of ~2.5 MDa. It consists of a 20S proteolytic core complex which is crowned at one or both ends by 19S regulatory subunit complexes. The 19S regulatory subunits recognize ubiquitinated proteins and play an essential role in unfolding and translocating targets into the lumen of the 20S subunit. An enzymatic cascade is responsible for the attachment of multiple ubiquitin molecules to lysine residues of proteins targeted for degradation. Several genetic diseases are associated with defects in the ubiquitin-proteasome pathway. Some examples of affected proteins include those linked to cystic fibrosis, Angelman"e;s syndrome, and Liddle syndrome.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
11S regulator complex beta subunit; 11S regulator complex subunit beta; activator of multicatalytic protease subunit 2; cell migration-inducing protein 22; MCP activator, 31-kD subunit; PA28B; PA28beta; protease (prosome, macropain) 28 subunit, beta; proteasome (prosome, macropain) 28 subunit, beta; proteasome (prosome, macropain) activator subunit 2 (PA28 beta); proteasome activator 28 subunit beta; proteasome activator 28-beta; proteasome activator complex subunit 2; proteasome activator hPA28 subunit beta; REG-beta; REGbeta
AA589371; AI788882; PA28B; Pa28b1; PA28beta; PSME2; REGbeta