Revision 4

#2360Store at -20C

Cell Signaling Technology

Orders: 877-616-CELL (2355) [email protected]

Support: 877-678-TECH (8324)

Web: [email protected] cellsignal.com

3 Trask LaneDanversMassachusetts01923USA
For Research Use Only. Not for Use in Diagnostic Procedures.
Applications:

WB, W-S, IHC-P

REACTIVITY:

H M R Mk

SENSITIVITY:

Endogenous

MW (kDa):

56

Source/Isotype:

Mouse IgG1

UniProt ID:

#O14757

Entrez-Gene Id:

1111

Product Information

Product Usage Information

Application Dilution
Western Blotting 1:1000
Simple Western™ 1:10 - 1:50
Immunohistochemistry (Paraffin) 1:50 - 1:200

Storage

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

Specificity / Sensitivity

Chk1 (2G1D5) Mouse mAb recognizes endogenous levels of total Chk1 protein.

Species Reactivity:

Human, Mouse, Rat, Monkey

Source / Purification

Monoclonal antibody is produced by immunizing animals with purified recombinant Chk1 protein.

Background

Chk1 kinase acts downstream of ATM/ATR kinase and plays an important role in DNA damage checkpoint control, embryonic development, and tumor suppression (1). Activation of Chk1 involves phosphorylation at Ser317 and Ser345 by ATM/ATR, followed by autophosphorylation of Ser296. Activation occurs in response to blocked DNA replication and certain forms of genotoxic stress (2). While phosphorylation at Ser345 serves to localize Chk1 to the nucleus following checkpoint activation (3), phosphorylation at Ser317 along with site-specific phosphorylation of PTEN allows for re-entry into the cell cycle following stalled DNA replication (4). Chk1 exerts its checkpoint mechanism on the cell cycle, in part, by regulating the cdc25 family of phosphatases. Chk1 phosphorylation of cdc25A targets it for proteolysis and inhibits its activity through 14-3-3 binding (5). Activated Chk1 can inactivate cdc25C via phosphorylation at Ser216, blocking the activation of cdc2 and transition into mitosis (6). Centrosomal Chk1 has been shown to phosphorylate cdc25B and inhibit its activation of CDK1-cyclin B1, thereby abrogating mitotic spindle formation and chromatin condensation (7). Furthermore, Chk1 plays a role in spindle checkpoint function through regulation of aurora B and BubR1 (8). Research studies have implicated Chk1 as a drug target for cancer therapy as its inhibition leads to cell death in many cancer cell lines (9).

  1. Liu, Q. et al. (2000) Genes Dev 14, 1448-59.
  2. Zhao, H. and Piwnica-Worms, H. (2001) Mol Cell Biol 21, 4129-39.
  3. Jiang, K. et al. (2003) J Biol Chem 278, 25207-17.
  4. Martin, S.A. and Ouchi, T. (2008) Mol Cancer Ther 7, 2509-16.
  5. Chen, M.S. et al. (2003) Mol Cell Biol 23, 7488-97.
  6. Zeng, Y. et al. (1998) Nature 395, 507-10.
  7. Löffler, H. et al. (2006) Cell Cycle 5, 2543-7.
  8. Zachos, G. et al. (2007) Dev Cell 12, 247-60.
  9. Garber, K. (2005) J Natl Cancer Inst 97, 1026-8.

Species Reactivity

Species reactivity is determined by testing in at least one approved application (e.g., western blot).

Western Blot Buffer

IMPORTANT: For western blots, incubate membrane with diluted primary antibody in 5% w/v nonfat dry milk, 1X TBS, 0.1% Tween® 20 at 4°C with gentle shaking, overnight.

Applications Key

WB: Western Blotting W-S: Simple Western™ IHC-P: Immunohistochemistry (Paraffin)

Cross-Reactivity Key

H: human M: mouse R: rat Hm: hamster Mk: monkey Vir: virus Mi: mink C: chicken Dm: D. melanogaster X: Xenopus Z: zebrafish B: bovine Dg: dog Pg: pig Sc: S. cerevisiae Ce: C. elegans Hr: horse GP: Guinea Pig Rab: rabbit All: all species expected

Trademarks and Patents

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
All other trademarks are the property of their respective owners. Visit cellsignal.com/trademarks for more information.

使用に関する制限

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Revision 4
#2360

Chk1 (2G1D5) Mouse mAb

Western Blotting Image 1: Chk1 (2G1D5) Mouse mAb Expand Image
Western blot analysis of extracts from various cell lines using Chk1 (2G1D5) Mouse mAb.
Western Blotting Image 2: Chk1 (2G1D5) Mouse mAb Expand Image
Western blot analysis of extracts from HeLa cells, transfected with 100 nM SignalSilence® Control siRNA (Fluorescein Conjugate) #6201 (-) or SignalSilence® Chk1 siRNA I #6241 or SignalSilence® Chk1 siRNA II (+), using Chk1 (2G1D5) Mouse mAb #2360 and β-Actin (13E5) Rabbit mAb #4970. Chk1 (2G1D5) Mouse mAb confirms silencing of Chk1 expression and β-Actin (13E5) Rabbit mAb is used to control for loading and specificity of Chk1 siRNA.
Western Blotting Image 1: Chk1 (2G1D5) Mouse mAb Expand Image
Simple Western™ analysis of lysates (1.0 mg/mL) from HeLa cells using Chk1 (2G1D5) Mouse mAb #2360. The virtual lane view (left) shows a single target band (as indicated) at 1:10 and 1:50 dilutions of primary antibody. The corresponding electropherogram view (right) plots chemiluminescence by molecular weight along the capillary at 1:10 (blue line) and 1:50 (green line) dilutions of primary antibody. This experiment was performed under reducing conditions on the Jess™ Simple Western instrument from ProteinSimple, a BioTechne brand, using the 12-230 kDa separation module.
Immunohistochemistry Image 1: Chk1 (2G1D5) Mouse mAb Expand Image

Immunohistochemical analysis of paraffin-embedded human oropharyngeal squamous cell carcinoma using Chk1 (2G1D5) Mouse mAb.

Immunohistochemistry Image 2: Chk1 (2G1D5) Mouse mAb Expand Image

Immunohistochemical analysis of paraffin-embedded human thymoma using Chk1 (2G1D5) Mouse mAb.

Immunohistochemistry Image 3: Chk1 (2G1D5) Mouse mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human squamous cell lung carcinoma using Chk1 (2G1D5) Mouse mAb.
Immunohistochemistry Image 4: Chk1 (2G1D5) Mouse mAb Expand Image

Immunohistochemical analysis of paraffin-embedded human esophageal adenocarcinoma using Chk1 (2G1D5) Mouse mAb.

Immunohistochemistry Image 5: Chk1 (2G1D5) Mouse mAb Expand Image

Immunohistochemical analysis of paraffin-embedded human Non-Hodgkin lymphoma using Chk1 (2G1D5) Mouse mAb.

Immunohistochemistry Image 6: Chk1 (2G1D5) Mouse mAb Expand Image

Immunohistochemical analysis of paraffin-embedded human urothelial carcinoma using Chk1 (2G1D5) Mouse mAb.

Immunohistochemistry Image 7: Chk1 (2G1D5) Mouse mAb Expand Image

Immunohistochemical analysis of paraffin-embedded human gastric adenocarcinoma using Chk1 (2G1D5) Mouse mAb.

Immunohistochemistry Image 8: Chk1 (2G1D5) Mouse mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human endometrial cancer using Chk1 (2G1D5) Mouse mAb.
Immunohistochemistry Image 9: Chk1 (2G1D5) Mouse mAb Expand Image

Immunohistochemical analysis of paraffin-embedded normal human uterus using Chk1 (2G1D5) Mouse mAb.

Immunohistochemistry Image 10: Chk1 (2G1D5) Mouse mAb Expand Image

Immunohistochemical analysis of paraffin-embedded human tonsil using Chk1 (2G1D5) Mouse mAb.

Immunohistochemistry Image 11: Chk1 (2G1D5) Mouse mAb Expand Image

Immunohistochemical analysis of paraffin-embedded normal human esophagus using Chk1 (2G1D5) Mouse mAb.

Immunohistochemistry Image 12: Chk1 (2G1D5) Mouse mAb Expand Image

Immunohistochemical analysis of paraffin-embedded normal human testis using Chk1 (2G1D5) Mouse mAb.

Immunohistochemistry Image 13: Chk1 (2G1D5) Mouse mAb Expand Image
Immunohistochemical analysis of paraffin-embedded normal human small intestine using Chk1 (2G1D5) Mouse mAb (left) compared to concentration-matched Mouse (G3A1) mAb IgG1 Isotype Control #5415 (right). 
Immunohistochemistry Image 14: Chk1 (2G1D5) Mouse mAb Expand Image
Immunohistochemical analysis of paraffin-embedded 293T cell pellet (left, high-expressing) or SK-MEL-28 cell pellet (right, low-expressing) using Chk1 (2G1D5) Mouse mAb.