|Immunohistochemistry (Paraffin) (IHC (P))||Assay-Dependent|
|Western Blot (WB)||2 µg/ml|
|Tested Species reactivity||Human, Mouse|
|Host / Isotype||Mouse / IgG1|
|Immunogen||Human Chk2 protein.|
|Storage buffer||PBS with 0.2% gelatin|
|Contains||0.05% sodium azide|
|Storage conditions||Store at 4°C short term. For long term storage, store at -20°C, avoiding freeze/thaw cycles.|
Suggested positive control: antigen standard for CHEK2 (transient overexpression lysate), human spleen.
Chk2 (checkpoint kinase 2) is the mammalian homolog of the Saccharomyces cerevisiae Rad53 and is required for the DNA damage and replication checkpoints (1). In response to low-dose ionizing radiation (IR), which occurs in an ataxia telangiectasia mutated (ATM)-dependent manner, Chk2 can phosphorylate the mitosis-inducing phosphatase Cdc25C on an inhibitory site, blocking entry into mitosis, and p53 on a regulatory site, causing G1 arrest (2,3). In human tissues, Chk2 is homogeneously expressed in renewing cell populations such as epidermis or intestine, heterogeneous in conditionally renewing tissues, and absent or at low level in static tissues such as muscle or brain (4). Mutations in Chk2 inactivates DNA damage checkpoint pathway involving Chk2 in lung cancer suggesting that reduced expression of Chk2 may be responsible for the development of lung cancer (5). The Chk2-/- knockout cells are resistant to DNA damage-induced apoptosis, defective for p53 stabilization and for induction of p53-dependent transcripts such as p21 in response to gamma irradiation (6).
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Protein Aliases: Cds1 homolog; Checkpoint kinase 2; checkpoint-like protein CHK2; CHK2; CHK2 checkpoint homolog; HuCds1; LFS2; PP1425; protein kinase Chk2; RAD53; Rad53 homolog; RP11-436C9.1; Serine/threonine-protein kinase Chk2
Gene Aliases: CDS1; CHEK2; CHK2; hCds1; HUCDS1; LFS2; PP1425; RAD53
Molecular Function: non-receptor serine/threonine protein kinase
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