Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1043
Number of amino acids:132
Molecular Weight:14908.29 Da
Theoretical pI:6.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)86.06%
Cysteine CYS (C)107.58%
Glutamic Acid GLU (E)75.3%
Aspartic Acid ASP (D)75.3%
Glycine GLY (G)96.82%
Phynylalanine PHE (F)107.58%
Isoleucine ILE (I)53.79%
Histidine HIS (H)43.03%
Lysine LYS (K)129.09%
Methionine MET (M)53.79%
Leucine LEU (L)118.33%
Asparagine ASN (N)75.3%
Glutamine GLN (Q)21.52%
Proline PRO (P)43.03%
Serine SER (S)86.06%
Arginine ARG (R)21.52%
Threonine THR (T)75.3%
Tryptophan TRP (W)21.52%
Valine VAL (V)75.3%
Tyrosine TYR (Y)53.79%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC666
HydrogenH1013
NitrogenN169
OxygenO190
SulphurS15

FormulaC666H1013N169O190S15
Total Number of Atoms:2053


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    19075
Absorption 0.1% (=1 g/l)    1.279,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18450
Absorption 0.1% (=1 g/l)    1.238,   assuming all CYS residues are reduced
Aromaticity:0.129

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.86

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.30, 21.21, 23.48]

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:68.7121
Grand average of hydropathicity (GRAVY):-0.06