Rabbit p21 Polyclonal Antibody | anti-CDKN1A antibody
Anti-p21 (pT145) Phospho Antibody
Western Blot (WB)
(Western blot analysis of p21 (pT145) expression in HT1080 EGF-treated (A), HeLa EGF-treated (B) whole cell lysates.)
Immunohistochemistry (IHC)
(Immunohistochemical analysis of p21 (pT145) staining in human prostate cancer formalin fixed paraffin embedded tissue section. The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH 6.0). The section was then incubated with the antibody at room temperature and detected using an HRP conjugated compact polymer system. DAB was used as the chromogen. The section was then counterstained with haematoxylin and mounted with DPX.)
Immunofluorescence (IF)
(Immunofluorescent analysis of p21 (pT145) staining in HeLa cells. Formalin-fixed cells were permeabilized with 0.1% Triton X-100 in TBS for 5-10 minutes and blocked with 3% BSA-PBS for 30 minutes at room temperature. Cells were probed with the primary antibody in 3% BSA-PBS and incubated overnight at 4 °C in a humidified chamber. Cells were washed with PBST and incubated with a DyLight 594-conjugated secondary antibody (red) in PBS at room temperature in the dark.)
NCBI and Uniprot Product Information
NCBI Description
This gene encodes a potent cyclin-dependent kinase inhibitor. The encoded protein binds to and inhibits the activity of cyclin-CDK2 or -CDK4 complexes, and thus functions as a regulator of cell cycle progression at G1. The expression of this gene is tightly controlled by the tumor suppressor protein p53, through which this protein mediates the p53-dependent cell cycle G1 phase arrest in response to a variety of stress stimuli. This protein can interact with proliferating cell nuclear antigen (PCNA), a DNA polymerase accessory factor, and plays a regulatory role in S phase DNA replication and DNA damage repair. This protein was reported to be specifically cleaved by CASP3-like caspases, which thus leads to a dramatic activation of CDK2, and may be instrumental in the execution of apoptosis following caspase activation. Multiple alternatively spliced variants have been found for this gene. [provided by RefSeq, Nov 2010]
Uniprot Description
p21Cip1: a cell-cycle regulatory protein that Interacts with cyclin-CDK2 and -CDK4, inhibiting cell cycle progression at G1. Its expression is tightly controlled by p53, through which this protein mediates the p53-dependent cell cycle arrest at G1 phase.
Protein type: Cell cycle regulation; Inhibitor
Chromosomal Location of Human Ortholog: 6p21.2
Cellular Component: nucleoplasm; intracellular membrane-bound organelle; perinuclear region of cytoplasm; cyclin-dependent protein kinase holoenzyme complex; cytosol; nucleus
Molecular Function: cyclin-dependent protein kinase inhibitor activity; cyclin binding; protein binding; cyclin-dependent protein kinase activating kinase activity; ubiquitin protein ligase binding; metal ion binding; protein complex binding
Biological Process: nerve growth factor receptor signaling pathway; response to arsenic; response to toxin; protein amino acid phosphorylation; DNA damage response, signal transduction by p53 class mediator resulting in cell cycle arrest; negative regulation of cell proliferation; positive regulation of fibroblast proliferation; positive regulation of B cell proliferation; cell cycle arrest; G2/M transition of mitotic cell cycle; DNA damage response, signal transduction by p53 class mediator resulting in induction of apoptosis; response to X-ray; response to corticosterone stimulus; epidermal growth factor receptor signaling pathway; response to drug; organ regeneration; phosphoinositide-mediated signaling; fibroblast growth factor receptor signaling pathway; negative regulation of cyclin-dependent protein kinase activity; response to organic nitrogen; positive regulation of programmed cell death; response to hyperoxia; positive regulation of protein kinase activity; Ras protein signal transduction; cellular response to extracellular stimulus; innate immune response; regulation of protein import into nucleus, translocation; negative regulation of phosphorylation; negative regulation of cell growth; regulation of cyclin-dependent protein kinase activity; mitotic cell cycle; response to DNA damage stimulus; G1/S transition of mitotic cell cycle; negative regulation of apoptosis
