Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4653
Number of amino acids:420
Molecular Weight:44238.79 Da
Theoretical pI:5.58


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)327.62%
Cysteine CYS (C)30.71%
Glutamic Acid GLU (E)163.81%
Aspartic Acid ASP (D)112.62%
Glycine GLY (G)235.48%
Phynylalanine PHE (F)194.52%
Isoleucine ILE (I)225.24%
Histidine HIS (H)51.19%
Lysine LYS (K)92.14%
Methionine MET (M)20.48%
Leucine LEU (L)5813.81%
Asparagine ASN (N)215%
Glutamine GLN (Q)112.62%
Proline PRO (P)348.1%
Serine SER (S)5813.81%
Arginine ARG (R)133.1%
Threonine THR (T)348.1%
Tryptophan TRP (W)20.48%
Valine VAL (V)419.76%
Tyrosine TYR (Y)61.43%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1998
HydrogenH3204
NitrogenN512
OxygenO605
SulphurS5

FormulaC1998H3204N512O605S5
Total Number of Atoms:6324


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):27
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    20065
Absorption 0.1% (=1 g/l)    0.454,   assuming all pairs of CYS residues form cystines

Ext. coefficient    19940
Absorption 0.1% (=1 g/l)    0.451,   assuming all CYS residues are reduced
Aromaticity:0.064

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.86

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.24, 32.38, 25.71]

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:110.214
Grand average of hydropathicity (GRAVY):0.37