Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4358
Number of amino acids:277
Molecular Weight:30550.48 Da
Theoretical pI:5.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)207.22%
Cysteine CYS (C)10.36%
Glutamic Acid GLU (E)103.61%
Aspartic Acid ASP (D)124.33%
Glycine GLY (G)134.69%
Phynylalanine PHE (F)207.22%
Isoleucine ILE (I)248.66%
Histidine HIS (H)62.17%
Lysine LYS (K)113.97%
Methionine MET (M)10.36%
Leucine LEU (L)217.58%
Asparagine ASN (N)248.66%
Glutamine GLN (Q)82.89%
Proline PRO (P)93.25%
Serine SER (S)3211.55%
Arginine ARG (R)72.53%
Threonine THR (T)227.94%
Tryptophan TRP (W)51.81%
Valine VAL (V)248.66%
Tyrosine TYR (Y)72.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1389
HydrogenH2132
NitrogenN358
OxygenO415
SulphurS2

FormulaC1389H2132N358O415S2
Total Number of Atoms:4296


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    37930
Absorption 0.1% (=1 g/l)    1.242,   assuming all pairs of CYS residues form cystines

Ext. coefficient    37930
Absorption 0.1% (=1 g/l)    1.242,   assuming all CYS residues are reduced
Aromaticity:0.116

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.95

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.46, 28.16, 18.77]

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:95.704
Grand average of hydropathicity (GRAVY):0.10