p53 (TP53) Rabbit Polyclonal Antibody

Specifications

Product Data
Applications	WB
Recommend Dilution	WB: 1:1000~1:2000
Reactivity	Human
Host	Rabbit
Clonality	Polyclonal
Immunogen	Synthetic phosphopeptide derived from human p53 around the phosphorylation site of Serine 46.
Specificity	p53 (Phospho-S46) polyclonal antibody detects endogenous levels of p53 protein only when phosphorylated at Ser46.
Formulation	Rabbit IgG, 1mg/ml in PBS with 0.02% sodium azide, 50% glycerol, pH7.2.
Concentration	1mg/ml
Conjugation	Unconjugated
Storage Condition	Store at 4°C short term. Aliquot and store at -20°C long term. Avoid freeze-thaw cycles.
Predicted Protein Size	~ 52 kDa
Gene Name	tumor protein p53
Database Link	Entrez Gene 7157 Human UniProt ID P04637
Background	The p53 tumor suppressor protein plays a major role in cellular response to DNA damage and other genomic aberrations. Activation of p53 can lead to either cell cycle arrest and DNA repair or apoptosis. p53 is phosphorylated at multiple sites in vivo and by several different protein kinases in vitro. DNA damage induces phosphorylation of p53 at Ser15 and Ser20 and leads to a reduced interaction between p53 and its negative regulator, the oncoprotein MDM2. MDM2 inhibits p53 accumulation by targeting it for ubiquitination and proteasomal degradation. p53 can be phosphorylated by ATM, ATR, and DNA-PK at Ser15 and Ser37. Phosphorylation impairs the ability of MDM2 to bind p53, promoting both the accumulation and activation of p53 in response to DNA damage. Chk2 and Chk1 can phosphorylate p53 at Ser20, enhancing its tetramerization, stability, and activity. p53 is phosphorylated at Ser392 in vivo and by CAK in vitro. Phosphorylation of p53 at Ser392 is increased in human tumors and has been reported to influence the growth suppressor function, DNA binding, and transcriptional activation of p53. p53 is phosphorylated at Ser6 and Ser9 by CK1δ and CK1ε both in vitro and in vivo. Phosphorylation of p53 at Ser46 regulates the ability of p53 to induce apoptosis. Acetylation of p53 is mediated by p300 and CBP acetyltransferases. Inhibition of deacetylation suppressing MDM2 from recruiting HDAC1 complex by p19 (ARF) stabilizes p53. Acetylation appears to play a positive role in the accumulation of p53 protein in stress response. Following DNA damage, human p53 becomes acetylated at Lys382 (Lys379 in mouse) in vivo to enhance p53-DNA binding. Deacetylation of p53 occurs through interaction with the SIRT1 protein, a deacetylase that may be involved in cellular aging and the DNA damage response.
Synonyms	Antigen NY-CO-13; Cellular tumor antigen p53; P53; Phosphoprotein p53; TP53; Tumor suppressor p53
Note	For research use only, not for use in diagnostic procedure.
Reference Data

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