Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5891
Number of amino acids:229
Molecular Weight:24764.62 Da
Theoretical pI:7.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)229.61%
Cysteine CYS (C)31.31%
Glutamic Acid GLU (E)83.49%
Aspartic Acid ASP (D)114.8%
Glycine GLY (G)156.55%
Phynylalanine PHE (F)208.73%
Isoleucine ILE (I)177.42%
Histidine HIS (H)41.75%
Lysine LYS (K)166.99%
Methionine MET (M)62.62%
Leucine LEU (L)135.68%
Asparagine ASN (N)125.24%
Glutamine GLN (Q)114.8%
Proline PRO (P)146.11%
Serine SER (S)156.55%
Arginine ARG (R)41.75%
Threonine THR (T)156.55%
Tryptophan TRP (W)00%
Valine VAL (V)219.17%
Tyrosine TYR (Y)20.87%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1124
HydrogenH1760
NitrogenN288
OxygenO323
SulphurS9

FormulaC1124H1760N288O323S9
Total Number of Atoms:3504


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    3105
Absorption 0.1% (=1 g/l)    0.125,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.120,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.87

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.88, 24.45, 21.40]

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:87.2926
Grand average of hydropathicity (GRAVY):0.15