Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4668
Number of amino acids:387
Molecular Weight:42424.15 Da
Theoretical pI:5.49


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3910.08%
Cysteine CYS (C)10.26%
Glutamic Acid GLU (E)215.43%
Aspartic Acid ASP (D)215.43%
Glycine GLY (G)235.94%
Phynylalanine PHE (F)194.91%
Isoleucine ILE (I)174.39%
Histidine HIS (H)61.55%
Lysine LYS (K)256.46%
Methionine MET (M)112.84%
Leucine LEU (L)3910.08%
Asparagine ASN (N)184.65%
Glutamine GLN (Q)164.13%
Proline PRO (P)164.13%
Serine SER (S)297.49%
Arginine ARG (R)102.58%
Threonine THR (T)379.56%
Tryptophan TRP (W)20.52%
Valine VAL (V)225.68%
Tyrosine TYR (Y)153.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1897
HydrogenH2976
NitrogenN490
OxygenO587
SulphurS12

FormulaC1897H2976N490O587S12
Total Number of Atoms:5962


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):42
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33350
Absorption 0.1% (=1 g/l)    0.786,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33350
Absorption 0.1% (=1 g/l)    0.786,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.32

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.46, 22.22, 28.42]

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:82.9973
Grand average of hydropathicity (GRAVY):-0.18