Peptide name : Pyrularia thionin

Source/Organism : Buffalo nut

Linear/Cyclic : Not found

Chirality : L

Peptide length: 47

C-terminal modification: Not found

N-terminal modification : Free

Non-natural peptide information: None

Assay type : Not specified

Assay time : Not found

Activity : Not found

Cell line : Not found

Cancer type : Colorectal cancer

Other activity : Not found

Amino acid composition bar chart :

Molecular mass : 5288.1635 Dalton

Aliphatic index : 0.519

Instability index : 34.9532

Hydrophobicity (GRAVY) : -0.510

Isoelectric point : 9.0641

Charge (pH 7) : 5.6789

Aromaticity : 0.063

Molar extinction coefficient (cysteine, cystine): (8480, 8980)

Hydrophobic/hydrophilic ratio : 0.88

hydrophobic moment : 0.2807

Missing amino acid : H,F,Q,M

Most occurring amino acid : C

Most occurring amino acid frequency : 8

Least occurring amino acid : W

Least occurring amino acid frequency : 1

Secondary structure fraction (Helix, Turn, Sheet): (0.1, 0.3, 0.2)

SMILES Notation: CC[C@H](C)[C@H](NC(=O)[C@H](CCC(=O)O)NC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CO)NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)CNC(=O)[C@@H]1CCCN1C(=O)[C@H](CC(C)C)NC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CS)NC(=O)[C@@H](NC(=O)[C@H](CC(N)=O)NC(=O)[C@H](Cc1ccc(O)cc1)NC(=O)[C@H](CS)NC(=O)[C@H](CC(N)=O)NC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](C)NC(=O)[C@H](Cc1c[nH]c2ccccc12)NC(=O)[C@@H](NC(=O)[C@H](CC(N)=O)NC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CS)NC(=O)[C@H](CS)NC(=O)[C@H](CO)NC(=O)[C@@H](N)CCCCN)[C@@H](C)O)C(C)C)[C@@H](C)O)[C@@H](C)CC)C(=O)N[C@@H](CS)C(=O)N[C@@H](C)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CS)C(=O)N[C@@H](CC(=O)O)C(=O)N[C@@H](CS)C(=O)N[C@@H](CCCCN)C(=O)N[C@H](C(=O)N[C@H](C(=O)N[C@@H](CO)C(=O)NCC(=O)N[C@H](C(=O)N[C@H](C(=O)N[C@@H](CS)C(=O)N1CCC[C@H]1C(=O)N[C@@H](CO)C(=O)N[C@@H](CC(=O)O)C(=O)N[C@@H](Cc1ccc(O)cc1)C(=O)N1CCC[C@H]1C(=O)N[C@@H](CCCCN)C(=O)O)[C@@H](C)O)[C@@H](C)O)[C@@H](C)CC)[C@@H](C)CC

1 : Vernon LP, et al. A toxic thionin from Pyrularia pubera: purification, properties, and amino acid sequence. Arch Biochem Biophys. 1985; 238:18-29. doi: 10.1016/0003-9861(85)90136-5

Paper title : A toxic thionin from Pyrularia pubera: purification, properties, and amino acid sequence.

Doi : https://doi.org/10.1016/0003-9861(85)90136-5

Abstract : A low-molecular-weight cytotoxic protein has been purified from Pyrularia pubera Michx. (Santalaceae). By comparison with the behavior of proteins of known molecular weight during Sephadex G-75 gel filtration and denaturing electrophoresis, a molecular weight of somewhat less than 6000 is indicated. Purification involves ammonium sulfate fractionation followed by either gel filtration on Sephadex G-75 or separation on a carboxymethyl cellulose CM52 column. At concentrations of 0.04 mg/ml the protein causes visible disruption of cultured mouse B16 melanoma cells. The complete amino acid sequence has been determined. The toxin contains 47 amino acids arranged as follows:Lys-Ser-Cys-Cys-Arg-Asn-Thr-Trp-Ala-Arg-Asn-C ys-Tyr-Asn-Val-Cys-Arg-Leu-Pro-Gly-Thr-Ile-Ser-Arg-Glu-Ile-Cys-Ala-Lys- Lys-Cys-Asp-Cys-Lys-Ile-Ile-Ser-Gly-Thr-Thr-Cys-Pro-Ser-Asp-Tyr-Pro-Ly s-OH. The protein is clearly a thionin, as shown by its close resemblance to the thionins from wheat and barley, to the viscotoxins from mistletoes, and to crambin.