Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3364
Number of amino acids:49
Molecular Weight:5442.4 Da
Theoretical pI:9.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)36.12%
Cysteine CYS (C)714.29%
Glutamic Acid GLU (E)24.08%
Aspartic Acid ASP (D)00%
Glycine GLY (G)510.2%
Phynylalanine PHE (F)24.08%
Isoleucine ILE (I)36.12%
Histidine HIS (H)24.08%
Lysine LYS (K)612.24%
Methionine MET (M)00%
Leucine LEU (L)24.08%
Asparagine ASN (N)24.08%
Glutamine GLN (Q)24.08%
Proline PRO (P)12.04%
Serine SER (S)48.16%
Arginine ARG (R)48.16%
Threonine THR (T)24.08%
Tryptophan TRP (W)12.04%
Valine VAL (V)12.04%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC229
HydrogenH376
NitrogenN76
OxygenO64
SulphurS7

FormulaC229H376N76O64S7
Total Number of Atoms:752


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5875
Absorption 0.1% (=1 g/l)    1.079,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.011,   assuming all CYS residues are reduced
Aromaticity:0.061

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 59.82

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.37, 24.49, 14.29]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:51.8367
Grand average of hydropathicity (GRAVY):-0.49