Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4782
Number of amino acids:352
Molecular Weight:39414.6 Da
Theoretical pI:8.4


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)195.4%
Cysteine CYS (C)92.56%
Glutamic Acid GLU (E)164.55%
Aspartic Acid ASP (D)195.4%
Glycine GLY (G)339.38%
Phynylalanine PHE (F)174.83%
Isoleucine ILE (I)205.68%
Histidine HIS (H)71.99%
Lysine LYS (K)318.81%
Methionine MET (M)61.7%
Leucine LEU (L)246.82%
Asparagine ASN (N)205.68%
Glutamine GLN (Q)133.69%
Proline PRO (P)113.13%
Serine SER (S)287.95%
Arginine ARG (R)82.27%
Threonine THR (T)226.25%
Tryptophan TRP (W)61.7%
Valine VAL (V)205.68%
Tyrosine TYR (Y)236.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1774
HydrogenH2698
NitrogenN460
OxygenO529
SulphurS15

FormulaC1774H2698N460O529S15
Total Number of Atoms:5476


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):35
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    67770
Absorption 0.1% (=1 g/l)    1.719,   assuming all pairs of CYS residues form cystines

Ext. coefficient    67270
Absorption 0.1% (=1 g/l)    1.707,   assuming all CYS residues are reduced
Aromaticity:0.131

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.14

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.25, 26.14, 18.47]

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:70.625
Grand average of hydropathicity (GRAVY):-0.40