Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4632
Number of amino acids:329
Molecular Weight:35156.49 Da
Theoretical pI:8.41


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)236.99%
Cysteine CYS (C)185.47%
Glutamic Acid GLU (E)51.52%
Aspartic Acid ASP (D)175.17%
Glycine GLY (G)4613.98%
Phynylalanine PHE (F)164.86%
Isoleucine ILE (I)154.56%
Histidine HIS (H)41.22%
Lysine LYS (K)82.43%
Methionine MET (M)51.52%
Leucine LEU (L)226.69%
Asparagine ASN (N)175.17%
Glutamine GLN (Q)144.26%
Proline PRO (P)267.9%
Serine SER (S)298.81%
Arginine ARG (R)195.78%
Threonine THR (T)185.47%
Tryptophan TRP (W)82.43%
Valine VAL (V)82.43%
Tyrosine TYR (Y)113.34%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1539
HydrogenH2331
NitrogenN441
OxygenO463
SulphurS23

FormulaC1539H2331N441O463S23
Total Number of Atoms:4797


Total number of positively charged residues (ARG + LYS):27
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    61515
Absorption 0.1% (=1 g/l)    1.750,   assuming all pairs of CYS residues form cystines

Ext. coefficient    60390
Absorption 0.1% (=1 g/l)    1.718,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.24

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.32, 35.87, 16.72]

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:57.9027
Grand average of hydropathicity (GRAVY):-0.33