Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4875
Number of amino acids:329
Molecular Weight:35640.52 Da
Theoretical pI:5.21


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)236.99%
Cysteine CYS (C)92.74%
Glutamic Acid GLU (E)154.56%
Aspartic Acid ASP (D)236.99%
Glycine GLY (G)236.99%
Phynylalanine PHE (F)185.47%
Isoleucine ILE (I)175.17%
Histidine HIS (H)51.52%
Lysine LYS (K)133.95%
Methionine MET (M)61.82%
Leucine LEU (L)3711.25%
Asparagine ASN (N)185.47%
Glutamine GLN (Q)61.82%
Proline PRO (P)123.65%
Serine SER (S)3711.25%
Arginine ARG (R)175.17%
Threonine THR (T)185.47%
Tryptophan TRP (W)10.3%
Valine VAL (V)267.9%
Tyrosine TYR (Y)51.52%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1566
HydrogenH2496
NitrogenN428
OxygenO490
SulphurS15

FormulaC1566H2496N428O490S15
Total Number of Atoms:4995


Total number of positively charged residues (ARG + LYS):30
Total number of negatively charged residues (ASP + GLU):38
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13450
Absorption 0.1% (=1 g/l)    0.377,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.363,   assuming all CYS residues are reduced
Aromaticity:0.073

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.91

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.61, 27.36, 24.62]

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:93.921
Grand average of hydropathicity (GRAVY):0.04