Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5593
Number of amino acids:187
Molecular Weight:21393.66 Da
Theoretical pI:9.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)126.42%
Cysteine CYS (C)31.6%
Glutamic Acid GLU (E)105.35%
Aspartic Acid ASP (D)63.21%
Glycine GLY (G)105.35%
Phynylalanine PHE (F)105.35%
Isoleucine ILE (I)168.56%
Histidine HIS (H)31.6%
Lysine LYS (K)179.09%
Methionine MET (M)21.07%
Leucine LEU (L)2211.76%
Asparagine ASN (N)126.42%
Glutamine GLN (Q)94.81%
Proline PRO (P)73.74%
Serine SER (S)158.02%
Arginine ARG (R)52.67%
Threonine THR (T)126.42%
Tryptophan TRP (W)52.67%
Valine VAL (V)31.6%
Tyrosine TYR (Y)84.28%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC980
HydrogenH1519
NitrogenN251
OxygenO276
SulphurS5

FormulaC980H1519N251O276S5
Total Number of Atoms:3031


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39545
Absorption 0.1% (=1 g/l)    1.848,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39420
Absorption 0.1% (=1 g/l)    1.843,   assuming all CYS residues are reduced
Aromaticity:0.123

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.78

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.22, 23.53, 24.60]

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:90.3208
Grand average of hydropathicity (GRAVY):-0.26