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Key Documents

C9358

Sigma-Aldrich

Anti-Chk1 antibody, Mouse monoclonal

~2 mg/mL, clone DCS-310, purified from hybridoma cell culture

Synonym(s):

Anti-CHK1

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About This Item

MDL number:
UNSPSC Code:
12352203
NACRES:
NA.41

biological source

mouse

conjugate

unconjugated

antibody form

purified from hybridoma cell culture

antibody product type

primary antibodies

clone

DCS-310, monoclonal

form

buffered aqueous solution

mol wt

antigen 54 kDa

species reactivity

human

concentration

~2 mg/mL

technique(s)

immunohistochemistry (formalin-fixed, paraffin-embedded sections): suitable
immunoprecipitation (IP): suitable
microarray: suitable
western blot: 1-2 μg/mL using whole extract of cultured 293T (human embryonal kidney) cells

isotype

IgG2b

UniProt accession no.

shipped in

dry ice

storage temp.

−20°C

target post-translational modification

unmodified

Gene Information

human ... CHEK1(1111)

General description

Checkpoint kinase 1 (Chk1) protein is a serine/threonine-protein kinase with a molar mass of 54 kDa. Monoclonal Anti-Chk1 (mouse IgG2b isotype) is derived from the DCS-310 hybridoma produced by the fusion of mouse myeloma cells and splenocytes from a BALB/c mouse immunized with a recombinant human Chk1.

Immunogen

recombinant human Chk1.

Application

Monoclonal Anti-Chk1 antibody produced in mouse has been used in:
  • immunoprecipitation
  • immunohistochemistry
  • immunoblotting

Monoclonal Anti-Chk1 antibody produced in mouse is suitable for immunohistochemistry (formalin-fixed, paraffin-embedded sections), immunoprecipitation, microarray and western blot at a working concentration of 1-2 μg/mL using whole extract of cultured 293T (human embryonal kidney) cells. It was used for immunohistochemistry in a study to investigate the specific role of Chk1 phosphorylations in cell survival and checkpoint activation. It was used for immunohistochemistry at a working dilution of 1:4000 in a study to explore Chk1 knockdown as a novel therapeutic approach to arrest cell-cycle progression in MM cells, thus increasing the rate of cell death. It was used for the immunoprecipitation and detection of total Chk1 by western blot to study a possible regulatory relationship between Chk1 and CK1, a member of the casein kinase 1 family.

Biochem/physiol Actions

Checkpoint kinase 1 (Chk1) protein acts as a cell cycle checkpoint regulator.
The protein propagates signals from damaged or unreplicated DNA. It is expressed and active only in S-G2 phases of the cell cycle. In response to DNA damage, it phosphorylates CDC25C at Ser 216, thus preventing activation of the Cdc2-cyclin B complex and mitotic entry, blocking cell cycle progression. 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. Chk1 can phosphorylate Wee1, a negative regulator of G2 to M transition.

Physical form

Solution in 0.01 M phosphate buffered saline, pH 7.4, containing 15 mM sodium azide.

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.

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Storage Class Code

10 - Combustible liquids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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C Lukas et al.
Cancer research, 61(13), 4990-4993 (2001-06-30)
The Chk2 kinase is a tumor suppressor and key transducer of DNA-damage checkpoints. We show that the human Chk2 protein is relatively stable, nuclear, and responding to gamma-radiation throughout the cell cycle. Contrary to the retinoblastoma protein-regulated, labile Chk1 kinase
Identification of potential therapeutic targets in malignant mesothelioma using cell-cycle gene expression analysis
Romagnoli S, et al.
The American Journal of Pathology, 174(3), 762-770 (2009)
Solange Romagnoli et al.
The American journal of pathology, 174(3), 762-770 (2009-02-17)
Cell-cycle defects are responsible for cancer onset and growth. We studied the expression profile of 60 genes involved in cell cycle in a series of malignant mesotheliomas (MMs), normal pleural tissues, and MM cell cultures using a quantitative polymerase chain
A Blasina et al.
Current biology : CB, 9(1), 1-10 (1999-01-16)
In human cells, the mitosis-inducing kinase Cdc2 is inhibited by phosphorylation on Thr14 and Tyr15. Disruption of these phosphorylation sites abrogates checkpoint-mediated regulation of Cdc2 and renders cells highly sensitive to agents that damage DNA. Phosphorylation of these sites is
Joachim Bischof et al.
PloS one, 8(7), e68803-e68803 (2013-07-19)
CK1δ, a member of the casein kinase 1 family, is involved in the regulation of various cellular processes and has been associated with the pathophysiology of neurodegenerative diseases and cancer. Therefore recently, interest in generating highly specific inhibitors for personalized

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