Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5798
Number of amino acids:155
Molecular Weight:17220.77 Da
Theoretical pI:7.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)127.74%
Cysteine CYS (C)21.29%
Glutamic Acid GLU (E)63.87%
Aspartic Acid ASP (D)95.81%
Glycine GLY (G)117.1%
Phynylalanine PHE (F)53.23%
Isoleucine ILE (I)149.03%
Histidine HIS (H)53.23%
Lysine LYS (K)106.45%
Methionine MET (M)53.23%
Leucine LEU (L)159.68%
Asparagine ASN (N)85.16%
Glutamine GLN (Q)63.87%
Proline PRO (P)85.16%
Serine SER (S)127.74%
Arginine ARG (R)53.23%
Threonine THR (T)95.81%
Tryptophan TRP (W)31.94%
Valine VAL (V)53.23%
Tyrosine TYR (Y)53.23%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC771
HydrogenH1211
NitrogenN207
OxygenO226
SulphurS7

FormulaC771H1211N207O226S7
Total Number of Atoms:2422


Total number of positively charged residues (ARG + LYS):15
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    24075
Absorption 0.1% (=1 g/l)    1.398,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23950
Absorption 0.1% (=1 g/l)    1.391,   assuming all CYS residues are reduced
Aromaticity:0.084

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 60.59

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.32, 25.16, 24.52]

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:90.0645
Grand average of hydropathicity (GRAVY):-0.20