Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5079
Number of amino acids:158
Molecular Weight:16643.43 Da
Theoretical pI:7.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)138.23%
Cysteine CYS (C)138.23%
Glutamic Acid GLU (E)106.33%
Aspartic Acid ASP (D)31.9%
Glycine GLY (G)1610.13%
Phynylalanine PHE (F)74.43%
Isoleucine ILE (I)53.16%
Histidine HIS (H)00%
Lysine LYS (K)116.96%
Methionine MET (M)53.16%
Leucine LEU (L)1710.76%
Asparagine ASN (N)63.8%
Glutamine GLN (Q)31.9%
Proline PRO (P)95.7%
Serine SER (S)106.33%
Arginine ARG (R)42.53%
Threonine THR (T)1811.39%
Tryptophan TRP (W)21.27%
Valine VAL (V)63.8%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC720
HydrogenH1168
NitrogenN192
OxygenO222
SulphurS18

FormulaC720H1168N192O222S18
Total Number of Atoms:2320


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11750
Absorption 0.1% (=1 g/l)    0.706,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11000
Absorption 0.1% (=1 g/l)    0.661,   assuming all CYS residues are reduced
Aromaticity:0.057

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.90

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.42, 25.95, 28.48]

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:73.5443
Grand average of hydropathicity (GRAVY):0.10