Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5412
Number of amino acids:186
Molecular Weight:19767.63 Da
Theoretical pI:9.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)136.99%
Cysteine CYS (C)31.61%
Glutamic Acid GLU (E)84.3%
Aspartic Acid ASP (D)52.69%
Glycine GLY (G)189.68%
Phynylalanine PHE (F)105.38%
Isoleucine ILE (I)84.3%
Histidine HIS (H)21.08%
Lysine LYS (K)115.91%
Methionine MET (M)21.08%
Leucine LEU (L)1910.22%
Asparagine ASN (N)84.3%
Glutamine GLN (Q)31.61%
Proline PRO (P)105.38%
Serine SER (S)2412.9%
Arginine ARG (R)63.23%
Threonine THR (T)136.99%
Tryptophan TRP (W)31.61%
Valine VAL (V)168.6%
Tyrosine TYR (Y)42.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC890
HydrogenH1403
NitrogenN233
OxygenO265
SulphurS5

FormulaC890H1403N233O265S5
Total Number of Atoms:2796


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    22585
Absorption 0.1% (=1 g/l)    1.143,   assuming all pairs of CYS residues form cystines

Ext. coefficient    22460
Absorption 0.1% (=1 g/l)    1.136,   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 : 45.50

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.26, 32.26, 22.58]

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:88.5486
Grand average of hydropathicity (GRAVY):0.10