Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6143
Number of amino acids:75
Molecular Weight:8424.01 Da
Theoretical pI:6.03


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)45.33%
Cysteine CYS (C)810.67%
Glutamic Acid GLU (E)22.67%
Aspartic Acid ASP (D)56.67%
Glycine GLY (G)56.67%
Phynylalanine PHE (F)45.33%
Isoleucine ILE (I)79.33%
Histidine HIS (H)00%
Lysine LYS (K)68%
Methionine MET (M)34%
Leucine LEU (L)56.67%
Asparagine ASN (N)22.67%
Glutamine GLN (Q)34%
Proline PRO (P)56.67%
Serine SER (S)22.67%
Arginine ARG (R)11.33%
Threonine THR (T)45.33%
Tryptophan TRP (W)11.33%
Valine VAL (V)45.33%
Tyrosine TYR (Y)45.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC378
HydrogenH586
NitrogenN90
OxygenO105
SulphurS11

FormulaC378H586N90O105S11
Total Number of Atoms:1170


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11960
Absorption 0.1% (=1 g/l)    1.420,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    1.360,   assuming all CYS residues are reduced
Aromaticity:0.120

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.38

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 18.67, 18.67]

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:83.2
Grand average of hydropathicity (GRAVY):0.28