Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4131
Number of amino acids:348
Molecular Weight:37186.01 Da
Theoretical pI:7.05


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4312.36%
Cysteine CYS (C)102.87%
Glutamic Acid GLU (E)82.3%
Aspartic Acid ASP (D)226.32%
Glycine GLY (G)236.61%
Phynylalanine PHE (F)205.75%
Isoleucine ILE (I)113.16%
Histidine HIS (H)41.15%
Lysine LYS (K)113.16%
Methionine MET (M)61.72%
Leucine LEU (L)3510.06%
Asparagine ASN (N)226.32%
Glutamine GLN (Q)154.31%
Proline PRO (P)113.16%
Serine SER (S)298.33%
Arginine ARG (R)195.46%
Threonine THR (T)308.62%
Tryptophan TRP (W)10.29%
Valine VAL (V)236.61%
Tyrosine TYR (Y)51.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1619
HydrogenH2576
NitrogenN462
OxygenO510
SulphurS16

FormulaC1619H2576N462O510S16
Total Number of Atoms:5183


Total number of positively charged residues (ARG + LYS):30
Total number of negatively charged residues (ASP + GLU):30
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13575
Absorption 0.1% (=1 g/l)    0.365,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.348,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.03

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.30, 24.43, 26.44]

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:83.0748
Grand average of hydropathicity (GRAVY):-0.01