Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4390
Number of amino acids:642
Molecular Weight:71935.16 Da
Theoretical pI:6.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)304.67%
Cysteine CYS (C)142.18%
Glutamic Acid GLU (E)365.61%
Aspartic Acid ASP (D)355.45%
Glycine GLY (G)426.54%
Phynylalanine PHE (F)426.54%
Isoleucine ILE (I)416.39%
Histidine HIS (H)101.56%
Lysine LYS (K)385.92%
Methionine MET (M)132.02%
Leucine LEU (L)639.81%
Asparagine ASN (N)314.83%
Glutamine GLN (Q)233.58%
Proline PRO (P)253.89%
Serine SER (S)629.66%
Arginine ARG (R)294.52%
Threonine THR (T)436.7%
Tryptophan TRP (W)60.93%
Valine VAL (V)406.23%
Tyrosine TYR (Y)192.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3224
HydrogenH5035
NitrogenN847
OxygenO963
SulphurS27

FormulaC3224H5035N847O963S27
Total Number of Atoms:10096


Total number of positively charged residues (ARG + LYS):67
Total number of negatively charged residues (ASP + GLU):71
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    62185
Absorption 0.1% (=1 g/l)    0.864,   assuming all pairs of CYS residues form cystines

Ext. coefficient    61310
Absorption 0.1% (=1 g/l)    0.852,   assuming all CYS residues are reduced
Aromaticity:0.104

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.33

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.87, 24.92, 22.12]

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:85.919
Grand average of hydropathicity (GRAVY):-0.14