Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1243
Number of amino acids:228
Molecular Weight:24080.93 Da
Theoretical pI:4.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)156.58%
Cysteine CYS (C)177.46%
Glutamic Acid GLU (E)52.19%
Aspartic Acid ASP (D)135.7%
Glycine GLY (G)229.65%
Phynylalanine PHE (F)83.51%
Isoleucine ILE (I)114.82%
Histidine HIS (H)20.88%
Lysine LYS (K)104.39%
Methionine MET (M)31.32%
Leucine LEU (L)135.7%
Asparagine ASN (N)2310.09%
Glutamine GLN (Q)31.32%
Proline PRO (P)146.14%
Serine SER (S)219.21%
Arginine ARG (R)31.32%
Threonine THR (T)208.77%
Tryptophan TRP (W)31.32%
Valine VAL (V)135.7%
Tyrosine TYR (Y)93.95%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1037
HydrogenH1594
NitrogenN280
OxygenO341
SulphurS20

FormulaC1037H1594N280O341S20
Total Number of Atoms:3272


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    30910
Absorption 0.1% (=1 g/l)    1.284,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.242,   assuming all CYS residues are reduced
Aromaticity:0.088

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.78

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.00, 35.09, 15.79]

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:64.1666
Grand average of hydropathicity (GRAVY):-0.17