Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4574
Number of amino acids:894
Molecular Weight:98320.17 Da
Theoretical pI:7.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)505.59%
Cysteine CYS (C)60.67%
Glutamic Acid GLU (E)505.59%
Aspartic Acid ASP (D)465.15%
Glycine GLY (G)404.47%
Phynylalanine PHE (F)455.03%
Isoleucine ILE (I)394.36%
Histidine HIS (H)313.47%
Lysine LYS (K)586.49%
Methionine MET (M)151.68%
Leucine LEU (L)819.06%
Asparagine ASN (N)444.92%
Glutamine GLN (Q)343.8%
Proline PRO (P)9210.29%
Serine SER (S)10711.97%
Arginine ARG (R)394.36%
Threonine THR (T)556.15%
Tryptophan TRP (W)20.22%
Valine VAL (V)505.59%
Tyrosine TYR (Y)101.12%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4359
HydrogenH6883
NitrogenN1211
OxygenO1337
SulphurS21

FormulaC4359H6883N1211O1337S21
Total Number of Atoms:13811


Total number of positively charged residues (ARG + LYS):97
Total number of negatively charged residues (ASP + GLU):96
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    26275
Absorption 0.1% (=1 g/l)    0.267,   assuming all pairs of CYS residues form cystines

Ext. coefficient    25900
Absorption 0.1% (=1 g/l)    0.263,   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 : 61.09

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.39, 31.66, 21.92]

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:74.1611
Grand average of hydropathicity (GRAVY):-0.51