Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5841
Number of amino acids:189
Molecular Weight:20510.65 Da
Theoretical pI:5.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)73.7%
Cysteine CYS (C)63.17%
Glutamic Acid GLU (E)52.65%
Aspartic Acid ASP (D)105.29%
Glycine GLY (G)147.41%
Phynylalanine PHE (F)115.82%
Isoleucine ILE (I)73.7%
Histidine HIS (H)31.59%
Lysine LYS (K)105.29%
Methionine MET (M)31.59%
Leucine LEU (L)3015.87%
Asparagine ASN (N)1910.05%
Glutamine GLN (Q)31.59%
Proline PRO (P)63.17%
Serine SER (S)157.94%
Arginine ARG (R)31.59%
Threonine THR (T)168.47%
Tryptophan TRP (W)10.53%
Valine VAL (V)178.99%
Tyrosine TYR (Y)31.59%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC917
HydrogenH1461
NitrogenN237
OxygenO276
SulphurS9

FormulaC917H1461N237O276S9
Total Number of Atoms:2900


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

Ext. coefficient    10345
Absorption 0.1% (=1 g/l)    0.504,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.486,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 15.12

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.51, 28.57, 23.81]

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:106.137
Grand average of hydropathicity (GRAVY):0.24