Revision 2

#99253Store at -20C

1 Kit

(7 x 20 microliters)

Cell Signaling Technology

Orders: 877-616-CELL (2355) [email protected]

Support: 877-678-TECH (8324)

Web: [email protected] cellsignal.com

3 Trask LaneDanversMassachusetts01923USA
For Research Use Only. Not for Use in Diagnostic Procedures.
Product Includes Product # Quantity Mol. Wt Isotype/Source
CRBN (D8H3S) Rabbit mAb 71810 20 µl 55 kDa Rabbit IgG
VHL Antibody 68547 20 µl 18-22 kDa Rabbit 
c-IAP1 (D5G9) Rabbit mAb 7065 20 µl 62 kDa Rabbit IgG
KEAP1 (D6B12) Rabbit mAb 8047 20 µl 60-64 kDa Rabbit IgG
MDM2 (D1V2Z) Rabbit mAb 86934 20 µl 90 kDa Rabbit IgG
β-TrCP (D13F10) Rabbit mAb 4394 20 µl 62 kDa Rabbit IgG
XIAP (D2Z8W) Rabbit mAb 14334 20 µl 53 kDa Rabbit IgG
Anti-rabbit IgG, HRP-linked Antibody 7074 100 µl Goat 

Please visit cellsignal.com for individual component applications, species cross-reactivity, dilutions, protocols, and additional product information.

Description

The PROTAC E3 Ligase Profiling Antibody Sampler Kit provides an economical means of detecting selected PROTAC E3 ligases. The kit includes enough antibodies to perform two western blot experiments with each primary antibody.

Storage

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/mL BSA, 50% glycerol, and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

Background

PROTAC (proteolysis-targeting chimera) is a technique that uses a class of small molecules to target specific proteins for degradation (1). The small molecules are heterobifunctional, consisting of two protein binding parts joined by a linker. One part of the molecule binds a protein of interest (POI), while the other part binds to an E3 ubiquitin ligase, bringing the E3 ligase close to the POI for ubiquitination coupled protein degradation (2). The first successful PROTAC study used the chimeric PROTAC-1 molecule to recruit the β-TrCP E3 ligase to dictate the ubiquitination and degradation of MetAP2 (3). There are over 600 E3 ligases, and only a few have been successfully developed by PROTAC to degrade target proteins (4). Among them, CRBN- and VHL-based PROTAC have been extensively explored and successfully applied for multiple disease treatments (5,6). The E3 ligased MDM2, c-IAP, and XIAP are fruitful in using PROTAC strategy for cancer treatment (7-9). PROTAC design using the KEAP1 E3 ligase has been developed for degradation of BRD3, BRD4, and Tau. KEAP1 is another promising member of the PROTAC team (10,11).

  1. Békés, M. et al. (2022) Nat Rev Drug Discov 21, 181-200.
  2. Li, X. and Song, Y. (2020) J Hematol Oncol 13, 50.
  3. Sakamoto, K.M. et al. (2001) Proc Natl Acad Sci USA 98, 8554-9.
  4. Zou, Y. et al. (2019) Cell Biochem Funct 37, 21-30.
  5. Wang, C. et al. (2021) Eur J Med Chem 225, 113749.
  6. Wang, C. et al. (2022) Eur J Med Chem 227, 113906.
  7. Naito, M. et al. (2019) Drug Discov Today Technol 31, 35-42.
  8. Vicente, A.T.S. and Salvador, J.A.R. (2022) Int J Mol Sci 23, 11068. doi: 10.3390/ijms231911068.
  9. Park, S. et al. (2023) Eur J Med Chem 245, 114910.
  10. Wei, J. et al. (2021) J Am Chem Soc 143, 15073-15083.
  11. Lu, M. et al. (2018) Eur J Med Chem 146, 251-259.

Background References

    Trademarks and Patents

    Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
    All other trademarks are the property of their respective owners. Visit cellsignal.com/trademarks for more information.

    Limited Uses

    Except as otherwise expressly agreed in a writing signed by a legally authorized representative of CST, the following terms apply to Products provided by CST, its affiliates or its distributors. Any Customer's terms and conditions that are in addition to, or different from, those contained herein, unless separately accepted in writing by a legally authorized representative of CST, are rejected and are of no force or effect.

    Products are labeled with For Research Use Only or a similar labeling statement and have not been approved, cleared, or licensed by the FDA or other regulatory foreign or domestic entity, for any purpose. Customer shall not use any Product for any diagnostic or therapeutic purpose, or otherwise in any manner that conflicts with its labeling statement. Products sold or licensed by CST are provided for Customer as the end-user and solely for research and development uses. Any use of Product for diagnostic, prophylactic or therapeutic purposes, or any purchase of Product for resale (alone or as a component) or other commercial purpose, requires a separate license from CST. Customer shall (a) not sell, license, loan, donate or otherwise transfer or make available any Product to any third party, whether alone or in combination with other materials, or use the Products to manufacture any commercial products, (b) not copy, modify, reverse engineer, decompile, disassemble or otherwise attempt to discover the underlying structure or technology of the Products, or use the Products for the purpose of developing any products or services that would compete with CST products or services, (c) not alter or remove from the Products any trademarks, trade names, logos, patent or copyright notices or markings, (d) use the Products solely in accordance with CST Product Terms of Sale and any applicable documentation, and (e) comply with any license, terms of service or similar agreement with respect to any third party products or services used by Customer in connection with the Products.

    Revision 2
    #99253

    PROTAC E3 Ligase Profiling Antibody Sampler Kit

    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 1 Expand Image
    Simple Western™ analysis of lysates (0.1 mg/mL) from U-937 cells using VHL Antibody #68547. The virtual lane view (left) shows the target band (as indicated) at 1:10 and 1:50 dilutions of primary antibody. The corresponding electropherogram view (right) plots chemiluminescence by molecular weight along the capillary at 1:10 (blue line) and 1:50 (green line) dilutions of primary antibody. This experiment was performed under reducing conditions on the Jess™ Simple Western instrument from ProteinSimple, a BioTechne brand, using the 2-40 kDa separation module.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 2 Expand Image
    Simple Western™ analysis of lysates (1 mg/mL) from 3T3 cells using CRBN (D8H3S) Rabbit mAb #71810. The virtual lane view (left) shows the target band (as indicated) at 1:10 and 1:50 dilutions of primary antibody. The corresponding electropherogram view (right) plots chemiluminescence by molecular weight along the capillary at 1:10 (blue line) and 1:50 (green line) dilutions of primary antibody. This experiment was performed under reducing conditions on the Jess™ Simple Western instrument from ProteinSimple, a BioTechne brand, using the 12-230 kDa separation module.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 3 Expand Image
    Western blot analysis of extracts from various cell lines using XIAP (D2Z8W) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 4 Expand Image
    Western blot analysis of extracts from various cell lines using β-TrCP (D13F10) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 5 Expand Image
    Western blot analysis of extracts from various cell lines using VHL Antibody (upper) and β-Actin (D6A8) Rabbit mAb #8457 (lower). Note that 786-O is a VHL-null cell line, demonstrating specificity of the antibody.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 6 Expand Image
    Western blot analysis of extracts from various cell lines using c-IAP1 (D5G9) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 7 Expand Image
    After the primary antibody is bound to the target protein, a complex with HRP-linked secondary antibody is formed. The LumiGLO® is added and emits light during enzyme catalyzed decomposition.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 8 Expand Image
    Western blot analysis of extracts from various cell lines using CRBN (D8H3S) Rabbit mAb (upper) or β-Actin (D6A8) Rabbit mAb #8457 (lower).
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 9 Expand Image
    Immunohistochemical analysis of paraffin-embedded human esophageal adenocarcinoma using CRBN (D8H3S) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 10 Expand Image
    Western blot analysis of extracts from various cell lines using KEAP1 (D6B12) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 11 Expand Image
    Western blot analysis of SJSA-1, U-2 OS, and Saos-2 cells, untreated (-) or treated with Nutlin 3a (10 μM, 24 hr; +), using MDM2 (D1V2Z) Rabbit mAb (upper) or α-Actinin (D6F6) XP® Rabbit mAb #6487 (lower).
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 12 Expand Image
    Western blot analysis of extracts from HT-29 cells, untreated (-) or treated with mithramycin A (200 nM, overnight; +) using XIAP (D2Z8W) Rabbit mAb (upper) or β-Actin (D6A8) Rabbit mAb #8457 (lower).
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 13 Expand Image
    Western blot analysis of extracts from HeLa cells, mock transfected (-) or transfected with human c-IAP1 (+), using c-IAP1 (D5G9) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 14 Expand Image
    Immunohistochemical analysis of paraffin-embedded human prostate adenocarcinoma using CRBN (D8H3S) Rabbit mAb
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 15 Expand Image
    Western blot analysis of extracts from OVCAR8 cells, transfected with 100 nM SignalSilence® Control siRNA (Unconjugated) #6568 (-), SignalSilence® KEAP1 siRNA I #5285 (+) or SignalSilence® KEAP1 siRNA II #5289 (+), using KEAP1 (D6B12) Rabbit mAb (upper) or α-Tubulin (11H10) Rabbit mAb #2125 (lower). The KEAP1 (D6B12) Rabbit mAb confirms silencing of KEAP1 expression, while the α-Tubulin (11H10) Rabbit mAb is used as a loading control.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 16 Expand Image
    Confocal immunofluorescent analysis of U-2 OS cells, untreated (left) or treated with Nutlin 3a (10 μM, 24 hr; right), using MDM2 (D1V2Z) Rabbit mAb (green). Actin filaments were labeled with DyLight 554 Phalloidin #13054 (red).
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 17 Expand Image
    Immunoprecipitation of XIAP from MCF7 cell extracts using Rabbit (DA1E) mAb IgG XP® Isotype Control #3900 (lane 2) or XIAP (D2Z8W) Rabbit mAb (lane 3). Lane 1 represents 10% input. Western blot was performed using XIAP (D2Z8W) Rabbit mAb. The conformation specific secondary antibody Mouse Anti-Rabbit IgG (Conformation Specific) (L27A9) mAb #3678 was using to avoid cross reactivity with the IgG heavy chain.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 18 Expand Image
    Immunoprecipitation of CRBN protein from TF-1 extracts. Lane 1 is CRBN (D8H3S) Rabbit mAb #71810, lane 2 is Rabbit (DA1E) mAb IgG XP® Isotype Control#3900, and lane 3 is 10% input. Western blot analysis was performed using CRBN (D8H3S) Rabbit mAb #71810. Mouse Anti-rabbit IgG (Conformation Specific) (L27A9) mAb #3678 was used as the secondary antibody.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 19 Expand Image
    Immunohistochemical analysis of paraffin-embedded human adenoid cystic carcinoma of the salivary gland using CRBN (D8H3S) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 20 Expand Image
    Confocal immunofluorescent analysis of OVCAR8 cells using KEAP1 (D6B12) Rabbit mAb (green). Blue pseudocolor = DRAQ5® #4084 (fluorescent DNA dye).
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 21 Expand Image
    Immunohistochemical analysis of paraffin-embedded human breast carcinoma using XIAP (D2Z8W) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 22 Expand Image
    Immunohistochemical analysis of paraffin-embedded human squamous cell lung carcinoma using CRBN D8H3S) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 23 Expand Image
    Immunohistochemical analysis of paraffin-embedded HT-29 cells, untreated (left) or mithramycin A-treated (right), using XIAP (D2Z8W) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 24 Expand Image
    Immunohistochemical analysis of paraffin-embedded human renal cell carcinoma using CRBN (D8H3S) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 25 Expand Image
    Immunohistochemical analysis of paraffin-embedded human non-small cell lung carcinoma using XIAP (D2Z8W) Rabbit mAb in the presence of control peptide (left) or antigen-specific peptide (right).
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 26 Expand Image
    Immunohistochemical analysis of paraffin-embedded normal human colon using CRBN (D8H3S) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 27 Expand Image
    Immunohistochemical analysis of paraffin-embedded normal human spleen using CRBN (D8H3S) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 28 Expand Image
    Immunohistochemical analysis of paraffin-embedded normal human testis using CRBN D8H3S) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 29 Expand Image
    Immunohistochemical analysis of paraffin-embedded 4T1 syngeneic tumor using CRBN (D8H3S) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 30 Expand Image
    Immunohistochemical analysis of paraffin-embedded LL/2 syngeneic tumor using CRBN (D8H3S) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 31 Expand Image
    Immunohistochemical analysis of paraffin-embedded Renca syngeneic tumor using CRBN (D8H3S) Rabbit mAb.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 32 Expand Image
    Immunohistochemical analysis of paraffin-embedded human normal testis (left), prostate adenocarcinoma (middle), and colon carcinoma (right) using CRBN (D8H3S) Rabbit mAb (top) or a CRBN rabbit mAb (bottom). These two antibodies detect unique, non-overlapping epitopes on CRBN protein. The similar staining patterns obtained with both antibodies to help to confirm the specificity of the staining.
    PROTAC E3 Ligase Profiling Antibody Sampler Kit: Image 33 Expand Image
    Immunohistochemical analysis of paraffin-embedded human colon carcinoma using CRBN (D8H3S) Rabbit mAb (left) compared to concentration-matched Rabbit (DA1E) mAb IgG XP® Isotype Control #3900 (right).