Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6024
Number of amino acids:79
Molecular Weight:8478.9 Da
Theoretical pI:8.15


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1215.19%
Cysteine CYS (C)810.13%
Glutamic Acid GLU (E)45.06%
Aspartic Acid ASP (D)00%
Glycine GLY (G)56.33%
Phynylalanine PHE (F)67.59%
Isoleucine ILE (I)33.8%
Histidine HIS (H)22.53%
Lysine LYS (K)45.06%
Methionine MET (M)11.27%
Leucine LEU (L)56.33%
Asparagine ASN (N)56.33%
Glutamine GLN (Q)22.53%
Proline PRO (P)33.8%
Serine SER (S)56.33%
Arginine ARG (R)22.53%
Threonine THR (T)22.53%
Tryptophan TRP (W)11.27%
Valine VAL (V)78.86%
Tyrosine TYR (Y)22.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC377
HydrogenH579
NitrogenN101
OxygenO104
SulphurS9

FormulaC377H579N101O104S9
Total Number of Atoms:1170


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):4
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)    1.059,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    1.000,   assuming all CYS residues are reduced
Aromaticity:0.114

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.35

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.38, 22.78, 27.85]

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:80.3798
Grand average of hydropathicity (GRAVY):0.47