Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2080
Number of amino acids:119
Molecular Weight:13601.71 Da
Theoretical pI:9.1


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)32.52%
Cysteine CYS (C)108.4%
Glutamic Acid GLU (E)75.88%
Aspartic Acid ASP (D)43.36%
Glycine GLY (G)1411.76%
Phynylalanine PHE (F)54.2%
Isoleucine ILE (I)43.36%
Histidine HIS (H)10.84%
Lysine LYS (K)108.4%
Methionine MET (M)32.52%
Leucine LEU (L)65.04%
Asparagine ASN (N)10.84%
Glutamine GLN (Q)108.4%
Proline PRO (P)75.88%
Serine SER (S)86.72%
Arginine ARG (R)97.56%
Threonine THR (T)32.52%
Tryptophan TRP (W)54.2%
Valine VAL (V)65.04%
Tyrosine TYR (Y)32.52%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC595
HydrogenH922
NitrogenN174
OxygenO167
SulphurS13

FormulaC595H922N174O167S13
Total Number of Atoms:1871


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    32595
Absorption 0.1% (=1 g/l)    2.396,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31970
Absorption 0.1% (=1 g/l)    2.350,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.28

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.37, 25.21, 15.97]

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:49.916
Grand average of hydropathicity (GRAVY):-0.65