Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4714
Number of amino acids:660
Molecular Weight:73848.96 Da
Theoretical pI:7.55


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)395.91%
Cysteine CYS (C)172.58%
Glutamic Acid GLU (E)314.7%
Aspartic Acid ASP (D)335%
Glycine GLY (G)446.67%
Phynylalanine PHE (F)375.61%
Isoleucine ILE (I)446.67%
Histidine HIS (H)81.21%
Lysine LYS (K)314.7%
Methionine MET (M)111.67%
Leucine LEU (L)598.94%
Asparagine ASN (N)406.06%
Glutamine GLN (Q)263.94%
Proline PRO (P)284.24%
Serine SER (S)629.39%
Arginine ARG (R)345.15%
Threonine THR (T)436.52%
Tryptophan TRP (W)101.52%
Valine VAL (V)385.76%
Tyrosine TYR (Y)253.79%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3300
HydrogenH5119
NitrogenN885
OxygenO985
SulphurS28

FormulaC3300H5119N885O985S28
Total Number of Atoms:10317


Total number of positively charged residues (ARG + LYS):65
Total number of negatively charged residues (ASP + GLU):64
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    93250
Absorption 0.1% (=1 g/l)    1.263,   assuming all pairs of CYS residues form cystines

Ext. coefficient    92250
Absorption 0.1% (=1 g/l)    1.249,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.85

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.27, 26.36, 21.21]

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:83.4697
Grand average of hydropathicity (GRAVY):-0.18