Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6141
Number of amino acids:77
Molecular Weight:8640.93 Da
Theoretical pI:8.57


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)67.79%
Cysteine CYS (C)67.79%
Glutamic Acid GLU (E)67.79%
Aspartic Acid ASP (D)22.6%
Glycine GLY (G)56.49%
Phynylalanine PHE (F)22.6%
Isoleucine ILE (I)56.49%
Histidine HIS (H)00%
Lysine LYS (K)79.09%
Methionine MET (M)45.19%
Leucine LEU (L)00%
Asparagine ASN (N)79.09%
Glutamine GLN (Q)11.3%
Proline PRO (P)22.6%
Serine SER (S)67.79%
Arginine ARG (R)45.19%
Threonine THR (T)33.9%
Tryptophan TRP (W)11.3%
Valine VAL (V)67.79%
Tyrosine TYR (Y)45.19%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC368
HydrogenH585
NitrogenN105
OxygenO115
SulphurS10

FormulaC368H585N105O115S10
Total Number of Atoms:1183


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):8
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11835
Absorption 0.1% (=1 g/l)    1.370,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    1.326,   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 : 24.34

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.38, 25.97, 20.78]

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:55.7143
Grand average of hydropathicity (GRAVY):-0.43