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phospho-CHEK1 (Ser286) Rabbit pAb (bs-13906R)  
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產(chǎn)品編號 bs-13906R
英文名稱 phospho-CHEK1 (Ser286) Rabbit pAb
中文名稱 磷酸化細胞周期檢測點激酶1抗體
別    名 Chk1(phospho S286); p-Chk1(phospho S286); Chk1(phospho-Ser286); CHEK1(phospho Ser286); CHEK1(phospho Ser286); p-CHEK1(Ser286); Cell cycle checkpoint kinase; Checkpoint, S. pombe, homolog of, 1; Checkpoint kinase 1; Checkpoint kinase 1 homolog(S. pombe); CHEK 1; CHEK-1; CHEK1; Chk 1; Chk1; CHK1 checkpoint homolog(S. pombe); EC 2.7.11.1; rad27; Serine/threonine protein kinase Chk1; Serine/threonine-protein kinase CHK1; STT3, subunit of the oligosaccharyltransferase complex, homolog A(S. cerevisiae); C85740; CHK1_HUMAN.  
產(chǎn)品類型 磷酸化抗體 
研究領(lǐng)域 細胞生物  染色質(zhì)和核信號  信號轉(zhuǎn)導(dǎo)  細胞周期蛋白  激酶和磷酸酶  表觀遺傳學  
抗體來源 Rabbit
克隆類型 Polyclonal
克 隆 號
交叉反應(yīng) Mouse (predicted: Human,Pig,Chicken,Dog,Horse)
產(chǎn)品應(yīng)用 WB=1:500-2000
not yet tested in other applications.
optimal dilutions/concentrations should be determined by the end user.
理論分子量 54 kDa
檢測分子量
細胞定位 細胞核 細胞漿 
性    狀 Liquid
濃    度 1mg/ml
免 疫 原 KLH conjugated Synthesised phosphopeptide derived from human CHEK1 around the phosphorylation site of Ser286: SE(p-S)PS 
亞    型 IgG
純化方法 affinity purified by Protein A
緩 沖 液 0.01M TBS (pH7.4) with 1% BSA, 0.02% Proclin300 and 50% Glycerol.
保存條件 Shipped at 4℃. Store at -20℃ for one year. Avoid repeated freeze/thaw cycles.
注意事項 This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
PubMed PubMed
產(chǎn)品介紹 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].

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. Isoform 2: Endogenous repressor of isoform 1, interacts with, and antagonizes CHK1 to promote the S to G2/M phase transition.

Subunit:
Interacts (phosphorylated by ATR) with RAD51. Interacts with and phosphorylates CLSPN, an adapter protein that regulates the ATR-dependent phosphorylation of CHEK1. Interacts with BRCA1. Interacts with and phosphorylates CDC25A, CDC25B and CDC25C. Interacts with FBXO6, which regulates CHEK1. Interacts with PPM1D, which regulates CHEK1 through dephosphorylation. Interacts with TIMELESS; DNA damage-dependent. Interacts with FEM1B; activates CHEK1 in response to stress. Interacts with TLK1. Interacts with XPO1 and YWHAZ. Isoform 1 associates with isoform 2, the interaction is disrupted upon phosphorylation by ATR.

Subcellular Location:
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.

Tissue Specificity:
Expressed ubiquitously with the most abundant expression in thymus, testis, small intestine and colon. Post-translational modifications : Phosphorylated by ATR in a RAD17-dependent manner in response to ultraviolet irradiation and inhibition of DNA replication. Phosphorylated by ATM in response to ionizing irradiation. ATM and ATR can both phosphorylate Ser-317 and Ser-345 and this results in enhanced kinase activity. Phosphorylation at Ser-345 induces a change in the conformation of the protein, activates the kinase activity and is a prerequisite for interaction with FBXO6 and subsequent ubiquitination at Lys-436. Phosphorylation at Ser-345 also increases binding to 14-3-3 proteins and promotes nuclear retention. Conversely, dephosphorylation at Ser-345 by PPM1D may contribute to exit from checkpoint mediated cell cycle arrest. Phosphorylation at Ser-280 by AKT1/PKB, may promote mono and/or diubiquitination. Also phosphorylated at undefined residues during mitotic arrest, resulting in decreased activity.

Similarity:
Belongs to the protein kinase superfamily.
CAMK Ser/Thr protein kinase family. NIM1 subfamily.
Contains 1 protein kinase domain.

SWISS:
O14757

Gene ID:
1111

Database links:

Entrez Gene: 1111 Human

Omim: 603078 Human

SwissProt: O14757 Human

Unigene: 24529 Human



Chk1作為Cdks的調(diào)節(jié)參與細胞周期調(diào)節(jié)過程,是生物進化過程中非常保守的蛋白激酶,在DNA損傷引起的細胞周期檢測點調(diào)節(jié)中有著非常重要的作用.在細胞周期檢測點信號傳導(dǎo)通路中,Chkl和Chk2起著重要作用,主要參與G2/M期細胞周期檢測點信號傳導(dǎo).
產(chǎn)品圖片
Sample: Thymus (Mouse) Lysate at 40 ug Primary: Anti- phospho-CHK1 (Ser286) (bs-13906R) at 1/300 dilution Secondary: IRDye800CW Goat Anti-Rabbit IgG at 1/20000 dilution Predicted band size: 54 kD Observed band size: 54 kD
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