Application
A. Western blot analysis on 293T cell lysates using anti-Phospho-Chk1 (pS296) RabMAb (Cat. #AJ1185d), 1:2000 dilution. Cells were either (A) untreated (B) treated with UV and APApplication
B.Immunofluorescent staining of HeLa cells using anti-Chk1 RabMAb (Cat. #AJ1185d).| Product Name | Chk1 Antibody Phospho (pS296) |
|---|---|
| Antibody Type | Primary Antibodies |
| Antigen Alias | CHEK1, CHK1, Serine/threonine-protein kinase Chk1 |
| Modification | p-S296 |
| Clonality | Monoclonal |
|---|---|
| Clone Number | EPR915 |
| Host Species | Rabbit |
| Tested Applications | WBIF |
| WB:1:1000~2000 |
|
| Species Reactivity | Human |
| Concentration | 1mg/ml |
| Gene Synonyms | CHK1 |
|---|---|
| Alternative Names | CHEK1 CHK1 Serine/threonine-protein kinase Chk1 |
| Molecular Weight(MW) | 54434 Da |
| Function | Serine/threonine-protein kinase which is required for checkpoint-mediated cell cycle arrest and activation of DNA repair in response to the presence of DNA damage or unreplicated DNA. May also negatively regulate cell cycle progression during unperturbed cell cycles. This regulation is achieved by a number of mechanisms that together help to preserve the integrity of the genome Recognizes the substrate consensus sequence [R-X-X-S/T]. Binds to and phosphorylates CDC25A, CDC25B and CDC25C. Phosphorylation of CDC25A at 'Ser-178' and 'Thr-507' and phosphorylation of CDC25C at 'Ser-216' creates binding sites for 14-3-3 proteins which inhibit CDC25A and CDC25C. Phosphorylation of CDC25A at 'Ser-76', 'Ser- 124', 'Ser-178', 'Ser-279' and 'Ser-293' promotes proteolysis of CDC25A. Phosphorylation of CDC25A at 'Ser-76' primes the protein for subsequent phosphorylation at 'Ser-79', 'Ser-82' and 'Ser-88' by NEK11, which is required for polyubiquitination and degradation of CDCD25A. Inhibition of CDC25 leads to increased inhibitory tyrosine phosphorylation of CDK-cyclin complexes and blocks cell cycle progression. Also phosphorylates NEK6. Binds to and phosphorylates RAD51 at 'Thr-309', which promotes the release of RAD51 from BRCA2 and enhances the association of RAD51 with chromatin, thereby promoting DNA repair by homologous recombination. Phosphorylates multiple sites within the C-terminus of TP53, which promotes activation of TP53 by acetylation and promotes cell cycle arrest and suppression of cellular proliferation. Also promotes repair of DNA cross-links through phosphorylation of FANCE. Binds to and phosphorylates TLK1 at 'Ser-743', which prevents the TLK1-dependent phosphorylation of the chromatin assembly factor ASF1A. This may enhance chromatin assembly both in the presence or absence of DNA damage. May also play a role in replication fork maintenance through regulation of PCNA. May regulate the transcription of genes that regulate cell- cycle progression through the phosphorylation of histones Phosphorylates histone H3.1 (to form H3T11ph), which leads to epigenetic inhibition of a subset of genes. May also phosphorylate RB1 to promote its interaction with the E2F family of transcription factors and subsequent cell cycle arrest |
| Tissue Specificity | Expressed ubiquitously with the most abundant expression in thymus, testis, small intestine and colon |
| Cellular Localization | Nucleus. Cytoplasm. Cytoplasm, cytoskeleton, centrosome. Note=Nuclear export is mediated at least in part by XPO1/CRM1. Also localizes to the centrosome specifically during interphase, where it may protect centrosomal CDC2 kinase from inappropriate activation by cytoplasmic CDC25B |
| Entrez Gene | 1111 |
|---|
Application
A. Western blot analysis on 293T cell lysates using anti-Phospho-Chk1 (pS296) RabMAb (Cat. #AJ1185d), 1:2000 dilution. Cells were either (A) untreated (B) treated with UV and AP
Application
B.Immunofluorescent staining of HeLa cells using anti-Chk1 RabMAb (Cat. #AJ1185d).| Application Notes | WB:1:1000~2000 |
|---|
| Form | Liquid |
|---|---|
| Storage Instructions | For short-term storage, store at 4° C. For long-term storage, aliquot and store at -20ºC or below. Avoid multiple freeze-thaw cycles. |
| Storage Buffer | 50 mM Tris-Glycine (pH 7.4), 0.15 M NaCl, 40% Glycerol, 0.01% sodium azide and 0.05% BSA. |
