Product nameAnti-KAP1 (phospho S824) antibody
See all KAP1 primary antibodies
DescriptionRabbit polyclonal to KAP1 (phospho S824)
Tested applicationsSuitable for: ICC, WB, ICC/IF, IPmore details
Species reactivityReacts with: Mouse, Human
Predicted to work with: Chimpanzee, Rhesus monkey, Gorilla, Orangutan
A synthetic phosphorylated peptide, corresponding to a sequence of human KAP1 surrounding Serine 824. NP_005753.1
- Whole cell lysate of asynchronous HeLa cells.
Storage instructionsShipped at 4°C. Upon delivery aliquot and store at -20°C. Avoid freeze / thaw cycles.
Storage bufferPreservative: 0.09% Sodium azide
Constituents: 0.1% BSA, Tris buffered saline
Concentration information loading...
PurityImmunogen affinity purified
- Cell Biology
- Proteolysis / Ubiquitin
- Proteasome / Ubiquitin
- Ubiquitin E3 Enzymes
- RING Finger E3 Ligase
Our Abpromise guarantee covers the use of ab70369 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
|ICC||Use at an assay dependent concentration.|
|WB||1/1000 - 1/5000. Detects a band of approximately 117 kDa (predicted molecular weight: 89 kDa).|
|IP||Use at 2-5 µg/mg of lysate.|
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
Detection of Human KAP1 (phospho S824) by Western Blot of Immunoprecipitates.
Samples: Whole cell lysate (1 mg for IP; 20% of IP loaded) from 293T cells that were mock treated (-) or treated with Etoposide (100 µM, 2h).
Detection: Chemiluminescence with an exposure time of 30 seconds.
Detection of KAP1 (phospho S824) by ab70369 (1:200) in NBF-fixed HeLa cells by Immunocytochemistry.
All lanes : Anti-KAP1 (phospho S824) antibody (ab70369) at 0.1 µg/ml
Lane 1 : Whole cell lysate from asynchronous HeLa cells, treated with neocarzinostatin (NCS; 200 ng/ml, 30 minutes) at 50 µg
Lane 2 : Whole cell lysate from asynchronous HeLa cells at 50 µg
Lane 3 : Whole cell lysate from asynchronous HeLa cells, treated with neocarzinostatin (NCS; 200 ng/ml, 30 minutes) at 200 µg
Lane 4 : Whole cell lysate from asynchronous HeLa cells at 200 µg
Developed using the ECL technique.
Predicted band size: 89 kDa
Observed band size: 117 kDa why is the actual band size different from the predicted?
ab70369 staining KAP1 (phospho S824) (red) in Human U2OS cells by ICC/IF (Immunocytochemistry/immunofluorescence). Cells were treated with 1 µM Etoposide for 3 hours prior to fixing. Cells were fixed with formaldehyde, permeabilized in 0.5% NP40 and blocked with 3% BSA for 2 hours at 21°C. Samples were incubated with primary antibody (1/1000 in PBS + 3% BSA) for 12 hours at 4°C. An Alexa Fluor®594-conjugated Mouse anti-rabbit IgG monoclonal (1/500) was used as the secondary antibody.
This product has been referenced in:
- Ao Y et al. Lamin A buffers CK2 kinase activity to modulate aging in a progeria mouse model. Sci Adv 5:eaav5078 (2019). Read more (PubMed: 30906869) »
- Teloni F et al. Efficient Pre-mRNA Cleavage Prevents Replication-Stress-Associated Genome Instability. Mol Cell 73:670-683.e12 (2019). Read more (PubMed: 30639241) »