Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4138
Number of amino acids:663
Molecular Weight:73156.86 Da
Theoretical pI:5.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)527.84%
Cysteine CYS (C)30.45%
Glutamic Acid GLU (E)629.35%
Aspartic Acid ASP (D)517.69%
Glycine GLY (G)588.75%
Phynylalanine PHE (F)243.62%
Isoleucine ILE (I)446.64%
Histidine HIS (H)50.75%
Lysine LYS (K)639.5%
Methionine MET (M)111.66%
Leucine LEU (L)517.69%
Asparagine ASN (N)314.68%
Glutamine GLN (Q)243.62%
Proline PRO (P)203.02%
Serine SER (S)274.07%
Arginine ARG (R)314.68%
Threonine THR (T)375.58%
Tryptophan TRP (W)20.3%
Valine VAL (V)527.84%
Tyrosine TYR (Y)152.26%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3220
HydrogenH5198
NitrogenN886
OxygenO1024
SulphurS14

FormulaC3220H5198N886O1024S14
Total Number of Atoms:10342


Total number of positively charged residues (ARG + LYS):94
Total number of negatively charged residues (ASP + GLU):113
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33475
Absorption 0.1% (=1 g/l)    0.458,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33350
Absorption 0.1% (=1 g/l)    0.456,   assuming all CYS residues are reduced
Aromaticity:0.062

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.07

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.36, 20.51, 26.55]

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:86.4706
Grand average of hydropathicity (GRAVY):-0.47