Peptide name : Ant-p53pep

Source/Organism : Not found

Linear/Cyclic : Linear

Chirality : L

Peptide length: 37

C-terminal modification: Linear

N-terminal modification : Not found

Non-natural peptide information: None

Assay type : Annexin V-FITC Binding assay

Assay time : 72h

Activity : IC50 : 30 µM

Cell line : MDA-MB-468

Cancer type : Breast cancer

Other activity : Not found

Amino acid composition bar chart :

Molecular mass : 4434.0667 Dalton

Aliphatic index : 0.289

Instability index : 55.7946

Hydrophobicity (GRAVY) : -1.708

Isoelectric point : 12

Charge (pH 7) : 12.0146

Aromaticity : 0.081

Molar extinction coefficient (cysteine, cystine): (11000, 11000)

Hydrophobic/hydrophilic ratio : 0.42307692

hydrophobic moment : 0.0216

Missing amino acid : C,P,I,E,D,Y

Most occurring amino acid : K

Most occurring amino acid frequency : 7

Least occurring amino acid : A

Least occurring amino acid frequency : 1

Secondary structure fraction (Helix, Turn, Sheet): (0.2, 0.2, 0.1)

SMILES Notation: CSCC[C@H](NC(=O)[C@H](CCCCN)NC(=O)[C@H](Cc1c[nH]c2ccccc12)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CCCCN)NC(=O)[C@H](Cc1c[nH]cn1)NC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CO)NC(=O)[C@@H](NC(=O)[C@H](CO)NC(=O)[C@H](CCC(N)=O)NC(=O)CNC(=O)[C@H](CCCCN)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CO)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](Cc1c[nH]cn1)NC(=O)[C@H](CO)NC(=O)[C@H](CO)NC(=O)[C@H](Cc1c[nH]cn1)NC(=O)[C@H](C)NC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CO)NC(=O)CN)[C@@H](C)O)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](Cc1ccccc1)C(=O)N[C@@H](Cc1c[nH]c2ccccc12)C(=O)N[C@H](C(=O)N[C@@H](CCCCN)C(=O)N[C@H](C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(=N)N)C(=O)NCC(=O)O)C(C)C)C(C)C

1 : Kim AL, et al. Conformational and molecular basis for induction of apoptosis by a p53 C-terminal peptide in human cancer cells. J Biol Chem. 1999; 274:34924-31. doi: 10.1074/jbc.274.49.34924

Paper title : Conformational and molecular basis for induction of apoptosis by a p53 C-terminal peptide in human cancer cells.

Doi : https://doi.org/10.1074/jbc.274.49.34924

Abstract : A p53-derived C-terminal peptide induced rapid apoptosis in breast cancer cell lines carrying endogenous p53 mutations or overexpressed wild-type (wt) p53 but was not toxic to nonmalignant human cell lines containing wt p53. Apoptosis occurred through a Fas/APO-1 signaling pathway involving increased extracellular levels of Fas/FasL in the absence of protein synthesis, as well as activation of a Fas/APO-1-specific protease, FLICE. The peptide activity was p53-dependent, and it had no effect in three tumor cell lines with null p53. Furthermore, the C-terminal peptide bound to p53 protein in cell extracts. Thus, p53-dependent, Fas/APO-1 mediated apoptosis can be induced in breast cancer cells with mutant p53 similar to the recently described Fas/APO-1 induced apoptosis by wt p53. However, mutant p53 without p53 peptide does not induce a Fas/APO-1 activation or apoptosis. Docking of the computed low energy conformations for the C-terminal peptide with those for a recently defined proline-rich regulatory region from the N-terminal domain of p53 suggests a unique low energy complex between the two peptide domains. The selective and rapid induction of apoptosis in cancer cells carrying p53 abnormalities may lead to a novel therapeutic modality.