Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6119
Number of amino acids:76
Molecular Weight:8295.83 Da
Theoretical pI:6.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)56.58%
Cysteine CYS (C)810.53%
Glutamic Acid GLU (E)56.58%
Aspartic Acid ASP (D)22.63%
Glycine GLY (G)56.58%
Phynylalanine PHE (F)11.32%
Isoleucine ILE (I)33.95%
Histidine HIS (H)22.63%
Lysine LYS (K)79.21%
Methionine MET (M)56.58%
Leucine LEU (L)56.58%
Asparagine ASN (N)11.32%
Glutamine GLN (Q)33.95%
Proline PRO (P)22.63%
Serine SER (S)45.26%
Arginine ARG (R)00%
Threonine THR (T)810.53%
Tryptophan TRP (W)11.32%
Valine VAL (V)79.21%
Tyrosine TYR (Y)22.63%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC355
HydrogenH578
NitrogenN92
OxygenO109
SulphurS13

FormulaC355H578N92O109S13
Total Number of Atoms:1147


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    8980
Absorption 0.1% (=1 g/l)    1.082,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    1.022,   assuming all CYS residues are reduced
Aromaticity:0.053

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 62.20

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.00, 15.79, 26.32]

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:74.3421
Grand average of hydropathicity (GRAVY):0.18