Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6154
Number of amino acids:75
Molecular Weight:8313.86 Da
Theoretical pI:6.01


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)34%
Cysteine CYS (C)810.67%
Glutamic Acid GLU (E)45.33%
Aspartic Acid ASP (D)22.67%
Glycine GLY (G)68%
Phynylalanine PHE (F)34%
Isoleucine ILE (I)79.33%
Histidine HIS (H)22.67%
Lysine LYS (K)34%
Methionine MET (M)34%
Leucine LEU (L)912%
Asparagine ASN (N)34%
Glutamine GLN (Q)45.33%
Proline PRO (P)11.33%
Serine SER (S)45.33%
Arginine ARG (R)22.67%
Threonine THR (T)56.67%
Tryptophan TRP (W)11.33%
Valine VAL (V)45.33%
Tyrosine TYR (Y)11.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC362
HydrogenH584
NitrogenN96
OxygenO105
SulphurS11

FormulaC362H584N96O105S11
Total Number of Atoms:1158


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    0.901,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.841,   assuming all CYS residues are reduced
Aromaticity:0.067

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 52.69

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 18.67, 25.33]

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:102.667
Grand average of hydropathicity (GRAVY):0.49