Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4310
Number of amino acids:358
Molecular Weight:39559.43 Da
Theoretical pI:8.59


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)308.38%
Cysteine CYS (C)82.23%
Glutamic Acid GLU (E)123.35%
Aspartic Acid ASP (D)205.59%
Glycine GLY (G)195.31%
Phynylalanine PHE (F)226.15%
Isoleucine ILE (I)236.42%
Histidine HIS (H)41.12%
Lysine LYS (K)164.47%
Methionine MET (M)92.51%
Leucine LEU (L)359.78%
Asparagine ASN (N)226.15%
Glutamine GLN (Q)195.31%
Proline PRO (P)154.19%
Serine SER (S)308.38%
Arginine ARG (R)205.59%
Threonine THR (T)215.87%
Tryptophan TRP (W)10.28%
Valine VAL (V)256.98%
Tyrosine TYR (Y)71.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1754
HydrogenH2794
NitrogenN484
OxygenO522
SulphurS17

FormulaC1754H2794N484O522S17
Total Number of Atoms:5571


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    16430
Absorption 0.1% (=1 g/l)    0.415,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15930
Absorption 0.1% (=1 g/l)    0.403,   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 : 47.28

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.56, 24.02, 24.02]

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:91.8157
Grand average of hydropathicity (GRAVY):-0.02