• Product name
  • Description
    Rabbit polyclonal to COPS4
  • Tested applications
    Suitable for: ICC/IF, WBmore details
  • Species reactivity
    Reacts with: Human
    Predicted to work with: Mouse, Rat, Rabbit, Horse, Chicken, Guinea pig, Cow, Dog, Turkey, Pig, Chimpanzee, Zebrafish, Rhesus monkey, Orangutan
  • Immunogen

    Synthetic peptide, which represented a c-terminal domain of human COP9 signalosome complex subunit 4 (LocusLink ID 51138).

  • Positive control
    • HEK 293T cells.



Our Abpromise guarantee covers the use of ab12322 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.
WB 1/5000 - 1/25000. Predicted molecular weight: 49 kDa.


  • Function
    Component of the COP9 signalosome complex (CSN), a complex involved in various cellular and developmental processes. The CSN complex is an essential regulator of the ubiquitin (Ubl) conjugation pathway by mediating the deneddylation of the cullin subunits of SCF-type E3 ligase complexes, leading to decrease the Ubl ligase activity of SCF-type complexes such as SCF, CSA or DDB2. The complex is also involved in phosphorylation of p53/TP53, c-jun/JUN, IkappaBalpha/NFKBIA, ITPK1 and IRF8/ICSBP, possibly via its association with CK2 and PKD kinases. CSN-dependent phosphorylation of TP53 and JUN promotes and protects degradation by the Ubl system, respectively.
  • Sequence similarities
    Belongs to the CSN4 family.
    Contains 1 PCI domain.
  • Cellular localization
    Cytoplasm. Nucleus.
  • Information by UniProt
  • Database links
  • Alternative names
    • CH4 antibody
    • COP9 (constitutive photomorphogenic) homolog subunit 4 antibody
    • COP9 complex homolog subunit 4 antibody
    • COP9 complex S4 antibody
    • COP9 constitutive photomorphogenic homolog subunit 4 (Arabidopsis) antibody
    • COP9 constitutive photomorphogenic homolog subunit 4 antibody
    • COP9 signalosome complex subunit 4 antibody
    • COP9 signalosome subunit 4 antibody
    • COPS4 antibody
    • CSN complex subunit 4 antibody
    • CSN4 antibody
    • CSN4 SCHPO antibody
    • CSN4_HUMAN antibody
    • DCH4 antibody
    • JAB1 containing signalosome subunit 4 antibody
    • JAB1-containing signalosome subunit 4 antibody
    • MGC94896 antibody
    • SGN4 antibody
    • Signalosome subunit 4 antibody
    see all


  • Predicted band size : 49 kDa

    Detection of Human CSN4 by Western Blot.
    Samples: Whole cell lysate (50 mcg E; 25 mcg T) from HEK 293T cells that were mock transfected (E) or transfected with a CSN4 expression construct (T).
    Antibody: Affinity purified rabbit anti-CSN4 antibody BL1061 used at the indicated concentrations.
    Detection: Chemiluminescence with a 10 second exposure.
  • ICC/IF image of ab12322 stained MCF7 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 (ab12322, 5µg/ml) overnight at +4°C. The secondary antibody (green) was ab96899 Dylight 488 goat anti-rabbit 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.


This product has been referenced in:
  • Füzesi-Levi MG  et al. Dynamic regulation of the COP9 signalosome in response to DNA damage. Mol Cell Biol 34:1066-76 (2014). WB ; Human . Read more (PubMed: 24421388) »
  • Bhansali M & Shemshedini L COP9 subunits 4 and 5 target soluble guanylyl cyclase a1 and p53 in prostate cancer cells. Mol Endocrinol 28:834-45 (2014). Read more (PubMed: 24725084) »

See all 3 Publications for this product

Customer reviews and Q&As

Abcam guarantees this product to work in the species/application used in this Abreview.
Western blot
Human Cell lysate - whole cell (amniotic fluid stem cells)
Loading amount
5 µg
amniotic fluid stem cells
Gel Running Conditions
Reduced Denaturing (12% SDS-PAGE)
Blocking step
Milk as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 5% · Temperature: 25°C

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Submitted Dec 15 2010


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