Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4349
Number of amino acids:386
Molecular Weight:42651.61 Da
Theoretical pI:5.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)369.33%
Cysteine CYS (C)20.52%
Glutamic Acid GLU (E)235.96%
Aspartic Acid ASP (D)215.44%
Glycine GLY (G)235.96%
Phynylalanine PHE (F)184.66%
Isoleucine ILE (I)246.22%
Histidine HIS (H)61.55%
Lysine LYS (K)246.22%
Methionine MET (M)123.11%
Leucine LEU (L)4010.36%
Asparagine ASN (N)174.4%
Glutamine GLN (Q)143.63%
Proline PRO (P)164.15%
Serine SER (S)297.51%
Arginine ARG (R)102.59%
Threonine THR (T)338.55%
Tryptophan TRP (W)20.52%
Valine VAL (V)184.66%
Tyrosine TYR (Y)184.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1916
HydrogenH2997
NitrogenN485
OxygenO586
SulphurS14

FormulaC1916H2997N485O586S14
Total Number of Atoms:5998


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    37945
Absorption 0.1% (=1 g/l)    0.890,   assuming all pairs of CYS residues form cystines

Ext. coefficient    37820
Absorption 0.1% (=1 g/l)    0.887,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.42

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.09, 22.02, 28.76]

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:87.513
Grand average of hydropathicity (GRAVY):-0.12