• Product nameAnti-OTUB1 antibody
    See all OTUB1 primary antibodies
  • Description
    Mouse monoclonal to OTUB1
  • Tested applicationsSuitable for: ICC/IF, ELISA, WBmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Tagged recombinant full length Human protein

  • Positive control
    • Nuclear extract from HeLa cells



Our Abpromise guarantee covers the use of ab76648 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
ICC/IF Use a concentration of 5 µg/ml.
ELISA Use at an assay dependent dilution.
WB Use a concentration of 1 - 5 µg/ml. Predicted molecular weight: 31 kDa.


  • FunctionHydrolase that can remove conjugated ubiquitin from proteins and plays an important regulatory role at the level of protein turnover by preventing degradation. Regulator of T-cell anergy, a phenomenon that occurs when T-cells are rendered unresponsive to antigen rechallenge and no longer respond to their cognate antigen. Acts via its interaction with RNF128/GRAIL, a crucial inductor of CD4 T-cell anergy. Isoform 1 destabilizes RNF128, leading to prevent anergy. In contrast, isoform 2 stabilizes RNF128 and promotes anergy. Surprisingly, it regulates RNF128-mediated ubiquitination, but does not deubiquitinate polyubiquitinated RNF128. Deubiquitinates estrogen receptor alpha (ESR1). Mediates deubiquitination of 'Lys-48'-linked polyubiquitin chains, but not 'Lys-63'-linked polyubiquitin chains. Not able to cleave di-ubiquitin. Also capable of removing NEDD8 from NEDD8 conjugates, but with a nuch lower preference compared to 'Lys-48'-linked ubiquitin.
  • Tissue specificityIsoform 1 is ubiquitous. Isoform 2 is expressed only in lymphoid tissues such as tonsils, lymph nodes and spleen, as well as peripheral blood mononuclear cells.
  • Sequence similaritiesBelongs to the peptidase C65 family.
    Contains 1 OTU domain.
  • DomainIn addition to ubiquitin-binding at the Cys-91 active site, a proximal ubiquitin-binding site is also present at Cys-23 Occupancy of the active site is needed to enable tight binding to the second site. Distinct binding sites for the ubiquitins may allow to discriminate among different isopeptide linkages (i.e. 'Lys-48'-, 'Lys-63'-linked polyubiquitin) in polyubiquitin substrates and achieve linkage-specific deubiquitination.
  • Cellular localizationCytoplasm.
  • Information by UniProt
  • Database links
  • Alternative names
    • Deubiquitinating enzyme OTUB1 antibody
    • hOTU1 antibody
    • HSPC263 antibody
    • OTB1 antibody
    • OTU domain containing ubiquitin aldehyde binding protein 1 antibody
    • OTU domain, ubiquitin aldehyde binding 1 antibody
    • OTU domain-containing Ubal-binding protein 1 antibody
    • OTU domain-containing ubiquitin aldehyde-binding protein 1 antibody
    • OTU-domain Ubal-binding 1 antibody
    • OTU1 antibody
    • Otub1 antibody
    • OTUB1_HUMAN antibody
    • Otubain 1 antibody
    • Otubain-1 antibody
    • Ubiquitin specific processing protease OTUB1 antibody
    • Ubiquitin thioesterase OTUB1 antibody
    • ubiquitin-specific protease otubain 1 antibody
    • Ubiquitin-specific-processing protease OTUB1 antibody
    see all

Anti-OTUB1 antibody images

  • Anti-OTUB1 antibody (ab76648) at 5 µg + HeLa cells nuclear extract at 25 µg

    Goat Anti-Mouse IgG (H&L) HRP-conjugated at 1/2500 dilution

    Predicted band size : 31 kDa
    Observed band size : 33 kDa (why is the actual band size different from the predicted?)
  • ICC/IF image of ab76648 stained HepG2 cells. The cells were 4% PFA fixed (10mins) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody (ab76648, 5µg/ml) overnight at +4°C. The secondary antibody (green) was ab96879 Dylight 488 goat anti-mouse IgG (H+L) used at a 1/250 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red) at a 1/200 dilution for 1h. DAPI was used to stain the cell nuclei (blue) at a concentration of 1.43µM.

References for Anti-OTUB1 antibody (ab76648)

ab76648 has not yet been referenced specifically in any publications.

Product Wall

Application Western blot
Loading amount 20 µg
Gel Running Conditions Reduced Denaturing
Sample Human Cell lysate - whole cell (HaCaT)
Specification HaCaT
Treatment control or OTUB1 siRNA treated
Blocking step Milk as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 5% · Temperature: 21°C

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Submitted Oct 14 2013