Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5799
Number of amino acids:150
Molecular Weight:16607.11 Da
Theoretical pI:6.07


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)128%
Cysteine CYS (C)21.33%
Glutamic Acid GLU (E)64%
Aspartic Acid ASP (D)106.67%
Glycine GLY (G)96%
Phynylalanine PHE (F)21.33%
Isoleucine ILE (I)138.67%
Histidine HIS (H)42.67%
Lysine LYS (K)96%
Methionine MET (M)64%
Leucine LEU (L)149.33%
Asparagine ASN (N)74.67%
Glutamine GLN (Q)64%
Proline PRO (P)64%
Serine SER (S)128%
Arginine ARG (R)53.33%
Threonine THR (T)96%
Tryptophan TRP (W)32%
Valine VAL (V)106.67%
Tyrosine TYR (Y)53.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC736
HydrogenH1176
NitrogenN198
OxygenO222
SulphurS8

FormulaC736H1176N198O222S8
Total Number of Atoms:2340


Total number of positively charged residues (ARG + LYS):14
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    24075
Absorption 0.1% (=1 g/l)    1.450,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23950
Absorption 0.1% (=1 g/l)    1.442,   assuming all CYS residues are reduced
Aromaticity:0.067

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.24

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.33, 22.67, 25.33]

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:97.5333
Grand average of hydropathicity (GRAVY):-0.09