Peptide name : N-Ter-TAT

Source/Organism : VDAC1(voltage-dependent anion channel1)

Linear/Cyclic : Linear

Chirality : L

Peptide length: 24

C-terminal modification: Linear

N-terminal modification : Not found

Non-natural peptide information: None

Assay type : SRB assay

Assay time : 1h

Activity : IC50 : > 50.0 μM

Cell line : A375

Cancer type : Human endometrial cancer

Other activity : Not found

Amino acid composition bar chart :

Molecular mass : 2963.4116 Dalton

Aliphatic index : 0.283

Instability index : 108.229

Hydrophobicity (GRAVY) : -1.887

Isoelectric point : 12

Charge (pH 7) : 8.7572

Aromaticity : 0.125

Molar extinction coefficient (cysteine, cystine): (1490, 1490)

Hydrophobic/hydrophilic ratio : 0.6

hydrophobic moment : 0.0024

Missing amino acid : C,W,H,M,I,E,S,N,A

Most occurring amino acid : R

Most occurring amino acid frequency : 7

Least occurring amino acid : D

Least occurring amino acid frequency : 1

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

SMILES Notation: CC(C)C[C@H](NC(=O)CNC(=O)[C@H](Cc1ccccc1)NC(=O)CNC(=O)[C@H](Cc1ccc(O)cc1)NC(=O)CNC(=O)[C@H](CCCCN)NC(=O)[C@@H](NC(=O)[C@H](Cc1ccccc1)NC(=O)[C@@H](NC(=O)[C@H](CC(=O)O)NC(=O)[C@@H](N)CCCNC(=N)N)C(C)C)[C@@H](C)O)C(=O)NCC(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N1CCC[C@H]1C(=O)N[C@@H](CCC(N)=O)C(=O)O

1 : Zhang F, et al. Mitochondrial Voltage-Dependent Anion Channel 1-Hexokinase-II Complex-Targeted Strategy for Melanoma Inhibition Using Designed Multiblock Peptide Amphiphiles. ACS Appl Mater Interfaces. 2021; 13:35281-35293. doi: 10.1021/acsami.1c04385

Paper title : Mitochondrial Voltage-Dependent Anion Channel 1-Hexokinase-II Complex-Targeted Strategy for Melanoma Inhibition Using Designed Multiblock Peptide Amphiphiles.

Doi : https://doi.org/10.1021/acsami.1c04385

Abstract : Targeted therapies of melanoma are of urgent need considering the resistance of this aggressive type of cancer to chemotherapeutics. The voltage-dependent anion channel 1 (VDAC1)-hexokinase-II (HK-II) complex is an emerging target for novel anticancer therapies based on induced mitochondria-mediated apoptosis. The low cell membrane permeability of the anticancer 12-mer peptide N-Ter (RDVFTKGYGFGL) derived from the N-terminal fragment of the VDAC1 protein impedes the intracellular targeting. Here, novel multiblock VDAC1-derived cationic amphiphilic peptides (referred to as Pal-N-Ter-TAT, pFL-N-Ter-TAT, and Pal-pFL-N-Ter-TAT) are designed with a self-assembly propensity and cell-penetrating properties. The created multiblock amphiphilic peptides of partial α-helical conformations form nanoparticles of ellipsoid-like shapes and are characterized by enhanced cellular uptake. The amphiphilic peptides can target mitochondria and dissociate the VDAC1-HK-II complex at the outer mitochondrial membrane, which result in mitochondria-mediated apoptosis. The latter is associated with decrease of the mitochondrial membrane potential, cytochrome c release, and changes of the expression levels of the apoptotic proteins in A375 melanoma cells. Importantly, the mitochondrial VDAC1-derived amphiphilic peptides have a comparable IC₅₀ value for melanoma cells to a small-molecule drug, sorafenib, which has been previously used in clinical trials for melanoma. These results demonstrate the potential of the designed peptide constructs for efficient melanoma inhibition.