Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4811
Number of amino acids:324
Molecular Weight:34720.91 Da
Theoretical pI:8.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)247.41%
Cysteine CYS (C)175.25%
Glutamic Acid GLU (E)61.85%
Aspartic Acid ASP (D)175.25%
Glycine GLY (G)4513.89%
Phynylalanine PHE (F)164.94%
Isoleucine ILE (I)154.63%
Histidine HIS (H)41.23%
Lysine LYS (K)72.16%
Methionine MET (M)51.54%
Leucine LEU (L)226.79%
Asparagine ASN (N)175.25%
Glutamine GLN (Q)144.32%
Proline PRO (P)226.79%
Serine SER (S)309.26%
Arginine ARG (R)206.17%
Threonine THR (T)164.94%
Tryptophan TRP (W)82.47%
Valine VAL (V)82.47%
Tyrosine TYR (Y)113.4%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1517
HydrogenH2298
NitrogenN438
OxygenO459
SulphurS22

FormulaC1517H2298N438O459S22
Total Number of Atoms:4734


Total number of positively charged residues (ARG + LYS):27
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    61390
Absorption 0.1% (=1 g/l)    1.768,   assuming all pairs of CYS residues form cystines

Ext. coefficient    60390
Absorption 0.1% (=1 g/l)    1.739,   assuming all CYS residues are reduced
Aromaticity:0.108

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.71

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.69, 35.19, 17.59]

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:59.1049
Grand average of hydropathicity (GRAVY):-0.32