14-741-M

CHK2 (I157T), active

• UNSPSC Code: 12352204
• NACRES: NA.32
• eCl@ss: 32160405
• Biological source: human

Propiedades

• biological source: human
• Quality Segment: 100
• mol wt: M_w 89.6 kDa
• manufacturer/tradename: Upstate^®
• technique(s): activity assay: suitable (kinase)
• NCBI accession no.: NM_007194
• UniProt accession no.: O96017
• Gene Information: human ... CHEK2(11200)

Descripción

General description

Product Source: N-terminal GST and C-terminal 6His-tagged,.recombinant human CHK2, residues 5 - end, containing the I157T mutation. Expressed in E. coli cells

Serine/threonine-protein kinase which is required for checkpoint-mediated cell cycle arrest, activation of DNA repair and apoptosis in response to the presence of DNA double-strand breaks. May also negatively regulate cell cycle progression during unperturbed cell cycles. Following activation, phosphorylates numerous effectors preferentially at the consensus sequence [L-X-R-X-X-S/T]. Regulates cell cycle checkpoint arrest through
phosphorylation of CDC25A, CDC25B and CDC25C, inhibiting their activity. Inhibition of CDC25 phosphatase activity leads to increased inhibitory tyrosine phosphorylation of CDK-cyclin complexes and blocks cell cycle progression. May also phosphorylate NEK6 which is involved in G2/M cell cycle arrest. Regulates DNA repair through phosphorylation of BRCA2, enhancing the association of RAD51 with chromatin which promotes DNA repair by homologous recombination. Also stimulates the transcription of genes involved in DNA repair (including BRCA2) through the phosphorylation and activation of the transcription factor FOXM1. Regulates apoptosis through the phosphorylation of p53/TP53, MDM4 and PML. Phosphorylation of p53/TP53 at ′Ser-20′ by CHEK2 may alleviate inhibition by MDM2, leading to accumulation of active p53/TP53. Phosphorylation of MDM4 may also reduce degradation of p53/TP53. Also controls the transcription of pro-apoptotic genes through phosphorylation of the transcription factor E2F1. Tumor suppressor, it may also have a DNA damage-independent function in mitotic spindle assembly by phosphorylating BRCA1. Its absence may be a cause of the chromosomal instability observed in some cancer cells

Biochem/physiol Actions

Protein Target: CHK2

Target Sub-Family: CAMK

Packaging

Also available in 250μg size as catalog # 14-741M and in bulk as catalog # 14-741-K.

Physical form

Protein in in 50mM Tris/HCl pH7.5, 300mM NaCl, 0.1mM EGTA, 0.03% Brij-35, 270mM sucrose, 1mM benzamidine, 0.2mM PMSF, 0.1% 2-mercaptoethanol. Frozen solution.

Purified using glutathione-agarose and Ni2+/NTA-agarose.

Preparation Note

12 months at -70°C

Analysis Note

Routinely evaluated by phosphorylation of CHKtide (KKKVSRSGLYRSPSMPENLNRPR)

Other Notes

For Specific Activity data, refer to the Certificate of Analysis for individual lots of this enzyme.

Legal Information

UPSTATE is a registered trademark of Merck KGaA, Darmstadt, Germany

Disclaimer

Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

Información de seguridad

• pictograms: GHS07
• signalword: Warning
• hcodes: H317
• pcodes: P261 - P272 - P280 - P302 + P352 - P333 + P313 - P362 + P364
• Hazard Classifications: Skin Sens. 1
• Clase de almacenamiento: 12 - Non Combustible Liquids
• wgk: WGK 2
• flash_point_f: Not applicable
• flash_point_c: Not applicable