Rabbit anti-Human Chk1 Polyclonal Antibody | anti-Chk1 antibody

Chk1 (Ab-317) Antibody

Cat. Num. AAA9404094

• Gene Names: CHEK1; CHK1
• Reactivity: Human
• Applications: Western Blot, Immunohistochemistry
• Purity: Antibodies were produced by immunizing rabbits with synthetic peptide and KLH conjugates. Antibodies were purified by affinity-chromatography using epitope-specific peptide.
• Synonyms: Chk1; Polyclonal Antibody; Chk1 (Ab-317) Antibody; CHEK1; anti-Chk1 antibody

• Host: Rabbit
• Reactivity: Human
• Clonality: Polyclonal
• Specificity: The antibody detects endogenous level of total Chk1 protein.
• Purity/Purification: Antibodies were produced by immunizing rabbits with synthetic peptide and KLH conjugates. Antibodies were purified by affinity-chromatography using epitope-specific peptide.
• Form/Format: Supplied at 1.0mg/mL in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
• Concentration: 1.0 mg/ml (varies by lot)
• Sequence Length: 476

• Applicable Applications for anti-Chk1 antibody: Western Blot (WB), Immunohistochemistry (IHC)
• Application Notes: Western blotting: 1:500~1:1000; Immunohistochemistry: 1:50~1:100
• Immunogen Type: Peptide-KLH
• Immunogen Description: Peptide sequence around aa.315~319 (S-S-S-Q-P) derived from Human Chk1.
• Target Name: Chk1
• Preparation and Storage: Store at -20 degree C for long term preservation (recommended). Store at 4 degree C for short term use.

Western Blot (WB)

(Western blot analysis of extracts from MDA231,Hela and 293 cells using Chk1(Ab-317) Antibody.)

Immunohistochemistry (IHC)

(Immunohistochemical analysis of paraffin-embedded human breast carcinoma tissue using Chk1(Ab-317) Antibody (left) or the same antibody preincubated with blocking peptide(right).)

Related Product Information for anti-Chk1 antibody

Chek1 is a protein kinase that inhibits mitotic entry after DNA damage, required for the DNA damage checkpoint and is strongly similar to murine Chek1. Checkpoint pathways control the order and timing of cell cycle transitions and ensure that critical events, such as DNA replication and chromosome segregation, are completed with high fidelity. The mouse and human proteins share 90% sequence identity through the protein kinase domains. The sequence of the 476-amino acid human Chek1 protein is 29%, 40%, and 44% identical to those of the fission yeast Chek1, C. elegans Chek1, and Drosophila 'grapes' (Grp) proteins, respectively. Chek1 is expressed ubiquitously as an approximately 2.4-kb mRNA, with the most abundant expression in thymus, testis, small intestine, and colon. The protein has altered mobility when isolated from cells treated with ionizing radiation, indicating that Chek1 is modified in response to DNA damage. In vitro, Chek1 directly phosphorylates a regulator of CDC2 tyrosine phosphorylation, CDC25C. In response to DNA damage, Chek1 phosphorylates and inhibits CDC25C, thus preventing activation of the CDC2-Cyclin-B complex and mitotic entry

Product Categories/Family for anti-Chk1 antibody

Total protein Ab

NCBI and Uniprot Product Information

• NCBI GI #: 166295194
• NCBI GeneID: 1111
• NCBI Accession #: NP_001107593.1
• NCBI GenBank Nucleotide #: NM_001114121.2
• UniProt Accession #: O14757; A8K934; B4DDD0; B4DSK3; B5BTY6; F5H7S4; H2BI51
• Molecular Weight: 50,415 Da
• NCBI Official Full Name: serine/threonine-protein kinase Chk1 isoform 1
• NCBI Official Synonym Full Names: checkpoint kinase 1
• NCBI Official Symbol: CHEK1
• NCBI Official Synonym Symbols: CHK1
• NCBI Protein Information: serine/threonine-protein kinase Chk1
• UniProt Protein Name: Serine/threonine-protein kinase Chk1
• Protein Family: Histidine protein kinase
• UniProt Gene Name: CHEK1
• UniProt Synonym Gene Names: CHK1
• UniProt Entry Name: CHK1_HUMAN

NCBI Description

The protein encoded by this gene belongs to the Ser/Thr protein kinase family. It is required for checkpoint mediated cell cycle arrest in response to DNA damage or the presence of unreplicated DNA. This protein acts to integrate signals from ATM and ATR, two cell cycle proteins involved in DNA damage responses, that also associate with chromatin in meiotic prophase I. Phosphorylation of CDC25A protein phosphatase by this protein is required for cells to delay cell cycle progression in response to double-strand DNA breaks. Several alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Oct 2011]

Uniprot Description

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.