Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5325
Number of amino acids:185
Molecular Weight:20146.74 Da
Theoretical pI:6.48


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)147.57%
Cysteine CYS (C)21.08%
Glutamic Acid GLU (E)52.7%
Aspartic Acid ASP (D)168.65%
Glycine GLY (G)137.03%
Phynylalanine PHE (F)73.78%
Isoleucine ILE (I)126.49%
Histidine HIS (H)42.16%
Lysine LYS (K)115.95%
Methionine MET (M)52.7%
Leucine LEU (L)137.03%
Asparagine ASN (N)52.7%
Glutamine GLN (Q)115.95%
Proline PRO (P)105.41%
Serine SER (S)2111.35%
Arginine ARG (R)94.86%
Threonine THR (T)105.41%
Tryptophan TRP (W)10.54%
Valine VAL (V)126.49%
Tyrosine TYR (Y)42.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC880
HydrogenH1404
NitrogenN248
OxygenO279
SulphurS7

FormulaC880H1404N248O279S7
Total Number of Atoms:2818


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11585
Absorption 0.1% (=1 g/l)    0.575,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    0.569,   assuming all CYS residues are reduced
Aromaticity:0.065

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 48.58

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.49, 26.49, 20.00]

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:79.0811
Grand average of hydropathicity (GRAVY):-0.34