Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6140
Number of amino acids:77
Molecular Weight:8709.96 Da
Theoretical pI:5.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)33.9%
Cysteine CYS (C)810.39%
Glutamic Acid GLU (E)79.09%
Aspartic Acid ASP (D)33.9%
Glycine GLY (G)56.49%
Phynylalanine PHE (F)22.6%
Isoleucine ILE (I)45.19%
Histidine HIS (H)00%
Lysine LYS (K)67.79%
Methionine MET (M)33.9%
Leucine LEU (L)22.6%
Asparagine ASN (N)67.79%
Glutamine GLN (Q)22.6%
Proline PRO (P)33.9%
Serine SER (S)67.79%
Arginine ARG (R)33.9%
Threonine THR (T)33.9%
Tryptophan TRP (W)22.6%
Valine VAL (V)67.79%
Tyrosine TYR (Y)33.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC371
HydrogenH580
NitrogenN102
OxygenO118
SulphurS11

FormulaC371H580N102O118S11
Total Number of Atoms:1182


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    15970
Absorption 0.1% (=1 g/l)    1.834,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15470
Absorption 0.1% (=1 g/l)    1.776,   assuming all CYS residues are reduced
Aromaticity:0.091

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 21.58

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.68, 25.97, 19.48]

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:56.8831
Grand average of hydropathicity (GRAVY):-0.41