Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5066
Number of amino acids:318
Molecular Weight:33402.48 Da
Theoretical pI:8.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3811.95%
Cysteine CYS (C)175.35%
Glutamic Acid GLU (E)51.57%
Aspartic Acid ASP (D)144.4%
Glycine GLY (G)4514.15%
Phynylalanine PHE (F)165.03%
Isoleucine ILE (I)92.83%
Histidine HIS (H)51.57%
Lysine LYS (K)72.2%
Methionine MET (M)61.89%
Leucine LEU (L)123.77%
Asparagine ASN (N)103.14%
Glutamine GLN (Q)134.09%
Proline PRO (P)185.66%
Serine SER (S)237.23%
Arginine ARG (R)185.66%
Threonine THR (T)247.55%
Tryptophan TRP (W)72.2%
Valine VAL (V)185.66%
Tyrosine TYR (Y)134.09%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1460
HydrogenH2203
NitrogenN419
OxygenO440
SulphurS23

FormulaC1460H2203N419O440S23
Total Number of Atoms:4545


Total number of positively charged residues (ARG + LYS):25
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    58870
Absorption 0.1% (=1 g/l)    1.762,   assuming all pairs of CYS residues form cystines

Ext. coefficient    57870
Absorption 0.1% (=1 g/l)    1.733,   assuming all CYS residues are reduced
Aromaticity:0.113

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.46

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.58, 30.19, 19.18]

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:54.1195
Grand average of hydropathicity (GRAVY):-0.15