Product nameAnti-KAP1 antibody [EPR5217]
See all KAP1 primary antibodies
DescriptionRabbit monoclonal [EPR5217] to KAP1
Tested applicationsSuitable for: WB, IHC-P, ICC/IFmore details
Unsuitable for: Flow Cyt or IP
Species reactivityReacts with: Mouse, Rat, Human
Synthetic peptide corresponding to residues on the C-terminus in Human KAP1.
- Purchase matching WB positive control:Recombinant Human KAP1 protein
- A431, HeLa, PC-3, and F9 cell lysates, Human spleen tissue, HeLa cells
Storage instructionsShipped at 4°C. Store at -20°C. Stable for 12 months at -20°C.
Storage bufferpH: 7.20
Preservative: 0.05% Sodium azide
Constituents: 0.1% BSA, 40% Glycerol, 9.85% Tris glycine, 50% Tissue culture supernatant
PurityTissue culture supernatant
- Cell Biology
- Proteolysis / Ubiquitin
- Proteasome / Ubiquitin
- Ubiquitin E3 Enzymes
- RING Finger E3 Ligase
Our Abpromise guarantee covers the use of ab109289 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
|WB||1/1000 - 1/10000. Detects a band of approximately 110 kDa (predicted molecular weight: 89 kDa).|
|IHC-P||1/250 - 1/500. Perform heat mediated antigen retrieval before commencing with IHC staining protocol.|
|ICC/IF||1/100 - 1/250.|
FunctionNuclear corepressor for KRAB domain-containing zinc finger proteins (KRAB-ZFPs). Mediates gene silencing by recruiting CHD3, a subunit of the nucleosome remodeling and deacetylation (NuRD) complex, and SETDB1 (which specifically methylates histone H3 at 'Lys-9' (H3K9me)) to the promoter regions of KRAB target genes. Enhances transcriptional repression by coordinating the increase in H3K9me, the decrease in histone H3 'Lys-9 and 'Lys-14' acetylation (H3K9ac and H3K14ac, respectively) and the disposition of HP1 proteins to silence gene expression. Recruitment of SETDB1 induces heterochromatinization. May play a role as a coactivator for CEBPB and NR3C1 in the transcriptional activation of ORM1. Also corepressor for ERBB4. Inhibits E2F1 activity by stimulating E2F1-HDAC1 complex formation and inhibiting E2F1 acetylation. May serve as a partial backup to prevent E2F1-mediated apoptosis in the absence of RB1. Important regulator of CDKN1A/p21(CIP1). Has E3 SUMO-protein ligase activity toward itself via its PHD-type zinc finger.
Tissue specificityExpressed in all tissues tested including spleen, thymus, prostate, testis, ovary, small intestine, colon and peripheral blood leukocytes.
PathwayProtein modification; protein sumoylation.
Sequence similaritiesBelongs to the TRIM/RBCC family.
Contains 2 B box-type zinc fingers.
Contains 1 bromo domain.
Contains 1 PHD-type zinc finger.
Contains 1 RING-type zinc finger.
DomainThe HP1 box is both necessary and sufficient for HP1 binding.
The PHD-type zinc finger enhances CEBPB transcriptional activity. The PHD-type zinc finger, the HP1 box and the bromo domain, function together to assemble the machinery required for repression of KRAB domain-containing proteins. Acts as an intramolecular SUMO E3 ligase for autosumoylation of bromodomain.
The RING-finger-B Box-coiled-coil/tripartite motif (RBCC/TRIM motif) is required for interaction with the KRAB domain of KRAB-zinc finger proteins. Binds four zinc ions per molecule. The RING finger and the N-terminal of the leucine zipper alpha helical coiled-coil region of RBCC are required for oligomerization.
Contains one Pro-Xaa-Val-Xaa-Leu (PxVxL) motif, which is required for interaction with chromoshadow domains. This motif requires additional residues -7, -6, +4 and +5 of the central Val which contact the chromoshadow domain.
modificationsPhosphorylated upon DNA damage, probably by ATM or ATR. ATM-induced phosphorylation on Ser-824 represses sumoylation leading to the de-repression of expression of a subset of genes involved in cell cycle control and apoptosis in response to genotoxic stress. Dephosphorylation by the phosphatases, PPP1CA and PP1CB forms, allows sumoylation and expression of TRIM28 target genes.
Sumoylation/desumoylation events regulate TRIM28-mediated transcriptional repression. Sumoylation is required for interaction with CHD3 and SETDB1 and the corepressor activity. Represses and is repressed by Ser-824 phosphorylation. Enhances the TRIM28 corepressor activity, inhibiting transcriptional activity of a number of genes including GADD45A and CDKN1A/p21. Lys-554, Lys-779 and Lys-804 are the major sites of sumoylation. In response to Dox-induced DNA damage, enhanced phosphorylation on Ser-824 prevents sumoylation and allows de-repression of CDKN1A/p21.
Cellular localizationNucleus. Associated with centromeric heterochromatin during cell differentiation through CBX1.
- Information by UniProt
- E3 SUMO protein ligase TRIM28 antibody
- E3 SUMO-protein ligase TRIM28 antibody
- FLJ29029 antibody
Lane 1: Wild type HAP1 whole cell lysate (20 µg)
Lane 2: Wild type HAP1 + DMSO whole cell lysate (20 µg)
Lane 3: Wild type HAP1 + Blaomycin whole cell lysate (20 µg)
Lane 4: TRIM28 knockout HAP1 whole cell lysate (20 µg)
Lane 5: TRIM28 knockout HAP1 + DMSO whole cell lysate (20 µg)
Lane 6: TRIM28 knockout HAP1 + Blaomycin whole cell lysate (20 µg)
Lane 7: HeLa + DMSO whole cell lysate (20 µg)
Lane 8: Hela + Blaomycin whole cell lysate (20 µg)
Lanes 1 - 8: Merged signal (red and green). Green - ab109289 observed at 110 kDa. Red - loading control, ab8245, observed at 37 kDa.
ab109289 was shown to specifically react with KAP1 in wild type cells as signal was lost in KAP1 knockout cells. Wild-type and KAP1 knockout samples were subjected to SDS-PAGE. Ab109289 and ab8245 (Mouse anti GAPDH loading control) were incubated overnight at 4°C at 1000 dilution and 1/20000 dilution respectively. Blots were developed with Goat anti-Rabbit IgG H&L (IRDye® 800CW) preabsorbed ab216773 and Goat anti-Mouse IgG H&L (IRDye® 680RD) preabsorbed ab216776 secondary antibodies at 1/20000 dilution for 1 hour at room temperature before imaging.
All lanes : Anti-KAP1 antibody [EPR5217] (ab109289) at 1/1000 dilution
Lane 1 : A431 cell lysate
Lane 2 : HeLa cell lysate
Lane 3 : PC-3 cell lysate
Lane 4 : F9 cell lysate
Lysates/proteins at 10 µg per lane.
Predicted band size: 89 kDa
Immunohistochemical analysis of paraffin-embedded Human spleen tissue using ab109289 at a dilution of 1/250.
Perform heat mediated antigen retrieval before commencing with IHC staining protocol.
Immunofluorescent staining of HeLa cells using ab109289 at a dilution of 1/100.
ab109289 has not yet been referenced specifically in any publications.