Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5503
Number of amino acids:279
Molecular Weight:30979.72 Da
Theoretical pI:8.79


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)217.53%
Cysteine CYS (C)82.87%
Glutamic Acid GLU (E)72.51%
Aspartic Acid ASP (D)145.02%
Glycine GLY (G)3010.75%
Phynylalanine PHE (F)145.02%
Isoleucine ILE (I)155.38%
Histidine HIS (H)31.08%
Lysine LYS (K)207.17%
Methionine MET (M)124.3%
Leucine LEU (L)176.09%
Asparagine ASN (N)165.73%
Glutamine GLN (Q)93.23%
Proline PRO (P)145.02%
Serine SER (S)93.23%
Arginine ARG (R)72.51%
Threonine THR (T)238.24%
Tryptophan TRP (W)93.23%
Valine VAL (V)176.09%
Tyrosine TYR (Y)145.02%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1404
HydrogenH2128
NitrogenN360
OxygenO393
SulphurS20

FormulaC1404H2128N360O393S20
Total Number of Atoms:4305


Total number of positively charged residues (ARG + LYS):27
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    70860
Absorption 0.1% (=1 g/l)    2.287,   assuming all pairs of CYS residues form cystines

Ext. coefficient    70360
Absorption 0.1% (=1 g/l)    2.271,   assuming all CYS residues are reduced
Aromaticity:0.133

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 20.73

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.82, 24.73, 20.43]

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:69.9283
Grand average of hydropathicity (GRAVY):-0.15