Peptide name : Plantaricin A

Source/Organism : Lactic acid bacteria

Linear/Cyclic : Not found

Chirality : Not found

Peptide length: 26

C-terminal modification: Not found

N-terminal modification : Two to three unidentified amino acid residues are present at the C-terminal ends of the α and β peptides

Non-natural peptide information: None

Assay type : Not specified

Assay time : Not found

Activity : Not found

Cell line : Not found

Cancer type : Not found

Other activity : Anti-bacterial activity

Amino acid composition bar chart :

Molecular mass : 2985.5462 Dalton

Aliphatic index : 0.676

Instability index : 19.8269

Hydrophobicity (GRAVY) : -0.423

Isoelectric point : 10.398

Charge (pH 7) : 5.7531

Aromaticity : 0.153

Molar extinction coefficient (cysteine, cystine): (12490, 12490)

Hydrophobic/hydrophilic ratio : 1

hydrophobic moment : -1.220

Missing amino acid : C,R,H,P,E,D,N

Most occurring amino acid : K

Most occurring amino acid frequency : 6

Least occurring amino acid : Y

Least occurring amino acid frequency : 1

Secondary structure fraction (Helix, Turn, Sheet): (0.4, 0.1, 0.3)

SMILES Notation: CC[C@H](C)[C@H](NC(=O)[C@H](C)NC(=O)[C@@H](NC(=O)[C@H](C)NC(=O)CNC(=O)[C@H](CCSC)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CO)NC(=O)[C@H](Cc1ccc(O)cc1)NC(=O)[C@H](C)NC(=O)[C@H](CO)NC(=O)[C@H](CO)NC(=O)[C@@H](N)CCCCN)[C@@H](C)O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@H](C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](Cc1ccccc1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](Cc1c[nH]c2ccccc12)C(=O)NCC(=O)N[C@@H](Cc1c[nH]c2ccccc12)C(=O)O)C(C)C

1 : Nissen-Meyer J, et al. Purification and characterization of plantaricin A, a Lactobacillus plantarum bacteriocin whose activity depends on the action of two peptides. J Gen Microbiol. 1993; 139:1973-8. doi: 10.1099/00221287-139-9-1973

Paper title : Purification and characterization of plantaricin A, a Lactobacillus plantarum bacteriocin whose activity depends on the action of two peptides.

Doi : https://doi.org/10.1099/00221287-139-9-1973

Abstract : A Lactobacillus plantarum bacteriocin, plantaricin A, has been purified to homogeneity by ammonium sulphate precipitation, binding to cation exchanger and Octyl-Sepharose, and reverse-phase chromatography. The bacteriocin activity was associated with two peptides, termed alpha and beta, which were separated upon reverse-phase chromatography. Bacteriocin activity required the complementary action of both the alpha and beta peptides. From the N-terminal end, 21 and 22 amino acid residues of alpha and beta, respectively, were sequenced. Further attempts at sequencing revealed no additional amino acid residues, suggesting that either the C terminus had been reached or that modifications in the next amino acid residue blocked the sequencing reaction. Judging from their amino acid sequence, alpha and beta may be encoded by the same gene, since alpha appeared to be a truncated form of beta. Alanine, the first amino acid residue at the N-terminal end of beta was not present at this position in alpha. Otherwise the sequences of alpha and beta appeared to be identical. The calculated molecular masses of the sequenced part of alpha and beta were 2426 and 2497 Da, respectively. The molecular masses of alpha and beta as determined by mass spectroscopy were 2687 +/- 30 and 2758 +/- 30 Da, respectively, indicating that (i) the only difference between alpha and beta was the presence of the N-terminal alanine residue in beta, and that (ii) in addition to the sequenced residues, two to three unidentified amino acid residues are present at the C-terminal ends of the alpha and beta peptides.(ABSTRACT TRUNCATED AT 250 WORDS)