Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5864
Number of amino acids:212
Molecular Weight:22936.63 Da
Theoretical pI:7.95


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)178.02%
Cysteine CYS (C)146.6%
Glutamic Acid GLU (E)20.94%
Aspartic Acid ASP (D)136.13%
Glycine GLY (G)2411.32%
Phynylalanine PHE (F)52.36%
Isoleucine ILE (I)104.72%
Histidine HIS (H)20.94%
Lysine LYS (K)52.36%
Methionine MET (M)31.42%
Leucine LEU (L)104.72%
Asparagine ASN (N)146.6%
Glutamine GLN (Q)136.13%
Proline PRO (P)94.25%
Serine SER (S)167.55%
Arginine ARG (R)125.66%
Threonine THR (T)146.6%
Tryptophan TRP (W)52.36%
Valine VAL (V)136.13%
Tyrosine TYR (Y)115.19%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC986
HydrogenH1513
NitrogenN289
OxygenO311
SulphurS17

FormulaC986H1513N289O311S17
Total Number of Atoms:3116


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    44765
Absorption 0.1% (=1 g/l)    1.952,   assuming all pairs of CYS residues form cystines

Ext. coefficient    43890
Absorption 0.1% (=1 g/l)    1.914,   assuming all CYS residues are reduced
Aromaticity:0.099

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 21.71

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.47, 29.72, 15.09]

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:62.5943
Grand average of hydropathicity (GRAVY):-0.33