Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1175
Number of amino acids:246
Molecular Weight:26681.08 Da
Theoretical pI:8.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)176.91%
Cysteine CYS (C)166.5%
Glutamic Acid GLU (E)62.44%
Aspartic Acid ASP (D)104.07%
Glycine GLY (G)2911.79%
Phynylalanine PHE (F)166.5%
Isoleucine ILE (I)83.25%
Histidine HIS (H)31.22%
Lysine LYS (K)62.44%
Methionine MET (M)41.63%
Leucine LEU (L)124.88%
Asparagine ASN (N)176.91%
Glutamine GLN (Q)104.07%
Proline PRO (P)218.54%
Serine SER (S)114.47%
Arginine ARG (R)135.28%
Threonine THR (T)239.35%
Tryptophan TRP (W)52.03%
Valine VAL (V)114.47%
Tyrosine TYR (Y)83.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1173
HydrogenH1761
NitrogenN329
OxygenO348
SulphurS20

FormulaC1173H1761N329O348S20
Total Number of Atoms:3631


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40420
Absorption 0.1% (=1 g/l)    1.515,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39420
Absorption 0.1% (=1 g/l)    1.477,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.31

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.39, 31.71, 15.85]

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:51.5853
Grand average of hydropathicity (GRAVY):-0.31