Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5807
Number of amino acids:230
Molecular Weight:25331.32 Da
Theoretical pI:4.57


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)135.65%
Cysteine CYS (C)114.78%
Glutamic Acid GLU (E)62.61%
Aspartic Acid ASP (D)156.52%
Glycine GLY (G)177.39%
Phynylalanine PHE (F)125.22%
Isoleucine ILE (I)177.39%
Histidine HIS (H)52.17%
Lysine LYS (K)93.91%
Methionine MET (M)20.87%
Leucine LEU (L)187.83%
Asparagine ASN (N)146.09%
Glutamine GLN (Q)156.52%
Proline PRO (P)146.09%
Serine SER (S)2611.3%
Arginine ARG (R)10.43%
Threonine THR (T)125.22%
Tryptophan TRP (W)62.61%
Valine VAL (V)73.04%
Tyrosine TYR (Y)104.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1132
HydrogenH1685
NitrogenN287
OxygenO350
SulphurS13

FormulaC1132H1685N287O350S13
Total Number of Atoms:3467


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    48525
Absorption 0.1% (=1 g/l)    1.916,   assuming all pairs of CYS residues form cystines

Ext. coefficient    47900
Absorption 0.1% (=1 g/l)    1.891,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.53

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.43, 30.87, 16.96]

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:73.8261
Grand average of hydropathicity (GRAVY):-0.20