| Field | Specification |
|---|---|
| Mfr No | |
| Alternative Names | Serine/threonine-protein kinase Chk1;2.7.11.1;CHK1 checkpoint homolog;Cell cycle checkpoint kinase;Checkpoint kinase-1;CHEK1;CHK1; |
| Cellular Localization | |
| Clonality | |
| Concentration | |
| Host | |
| Immunogen | A synthesized peptide derived from human Phospho-Chk1 (S296) |
| Isotype | |
| Molecular Weight | |
| Product Type | |
| Reactivity | |
| Target | |
| UniProt # |
Overview
Anti-Phospho-Chk1 (S296) CHEK1 Rabbit Monoclonal Antibody is an antibody targeting CHEK1. Common applications include WB. Key specifications include host: Rabbit; clonality: Monoclonal; clone: Clone: FEO-3; isotype: Rabbit IgG; reactivity: Human; observed MW: 80 kDa; calculated MW: 54434 MW.
Boster Bio Anti-Phospho-Chk1 (S296) CHEK1 Rabbit Monoclonal Antibody catalog # P01060. Tested in WB application. This antibody reacts with Human.
Key elements and design rationale
- Target: CHEK1 — Serine/threonine-protein kinase Chk1
- Antibody format: Host: Rabbit; Clonality: Monoclonal; Clone: Clone: FEO-3; Isotype: Rabbit IgG
- Species reactivity: Human
- Molecular weight guidance: Observed: 80 kDa; Calculated: 54434 MW
- Phospho site(s): S296
Biological background
Protein function (datasheet): 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.
Cellular localization (datasheet): Nucleus. Cytoplasm. Cytoplasm, cytoskeleton, microtubule organizing center, centrosome. 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.
Tissue details (datasheet): Expressed ubiquitously with the most abundant expression in thymus, testis, small intestine and colon. .
Research relevance and current trends
- Commonly studied in contexts related to Cancer,Cell Cycle,DNA/RNA,DNA Damage & Repair,DNA Damage Response,Epigenetics and Nuclear Signaling,Kinases/Phosphatases.
- Supports comparative expression analysis across conditions, genotypes, or treatments when paired with appropriate controls.
- Useful for confirming target presence and subcellular distribution using orthogonal readouts (e.g., microscopy vs. immunoblotting).
Common research applications
- Western blot (WB): Compare relative target abundance and apparent size/isoforms across samples; interpret bands in light of expected MW and potential PTMs.
Notes for experimental interpretation
- Consider isoforms, post-translational modifications, and processing that can shift apparent molecular weight or localization.
- Use appropriate positive and negative controls (e.g., KO/KD, blocking peptide, or isotype controls) to support specificity interpretation.
As a monoclonal antibody, this reagent is expected to recognize a defined epitope, which can support consistency across lots when epitope accessibility is preserved.
Customization & Add-ons: Can’t find the antibody you need—or require a custom format for your assay? We can help you source the best match or support custom antibody solutions for diverse research needs, including species and isotype selection, conjugations and labeling (e.g., HRP/AP, biotin, fluorophores), purification grade options (Protein A/G, affinity purified), formulation preferences (buffer selection, carrier-free, glycerol-free), custom concentrations and aliquoting, low-endotoxin options for cell-based work, and application-focused QC/validation support (project dependent). Click Talk to a Scientist to submit a request, email us at support@biohippo.com, or explore our Research Services for additional support—our team will follow up with feasibility details and next steps.
