Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5668
Number of amino acids:328
Molecular Weight:35406.73 Da
Theoretical pI:8.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)257.62%
Cysteine CYS (C)175.18%
Glutamic Acid GLU (E)61.83%
Aspartic Acid ASP (D)164.88%
Glycine GLY (G)4413.41%
Phynylalanine PHE (F)175.18%
Isoleucine ILE (I)154.57%
Histidine HIS (H)51.52%
Lysine LYS (K)92.74%
Methionine MET (M)41.22%
Leucine LEU (L)206.1%
Asparagine ASN (N)257.62%
Glutamine GLN (Q)133.96%
Proline PRO (P)226.71%
Serine SER (S)257.62%
Arginine ARG (R)206.1%
Threonine THR (T)123.66%
Tryptophan TRP (W)82.44%
Valine VAL (V)133.96%
Tyrosine TYR (Y)123.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1554
HydrogenH2345
NitrogenN453
OxygenO460
SulphurS21

FormulaC1554H2345N453O460S21
Total Number of Atoms:4833


Total number of positively charged residues (ARG + LYS):29
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    62880
Absorption 0.1% (=1 g/l)    1.776,   assuming all pairs of CYS residues form cystines

Ext. coefficient    61880
Absorption 0.1% (=1 g/l)    1.748,   assuming all CYS residues are reduced
Aromaticity:0.113

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.51

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.91, 35.37, 16.77]

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:60.7317
Grand average of hydropathicity (GRAVY):-0.35