Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5606
Number of amino acids:501
Molecular Weight:55418.74 Da
Theoretical pI:8.07


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)418.18%
Cysteine CYS (C)71.4%
Glutamic Acid GLU (E)163.19%
Aspartic Acid ASP (D)295.79%
Glycine GLY (G)387.58%
Phynylalanine PHE (F)244.79%
Isoleucine ILE (I)203.99%
Histidine HIS (H)142.79%
Lysine LYS (K)244.79%
Methionine MET (M)132.59%
Leucine LEU (L)5110.18%
Asparagine ASN (N)244.79%
Glutamine GLN (Q)152.99%
Proline PRO (P)285.59%
Serine SER (S)5410.78%
Arginine ARG (R)234.59%
Threonine THR (T)234.59%
Tryptophan TRP (W)71.4%
Valine VAL (V)244.79%
Tyrosine TYR (Y)265.19%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2485
HydrogenH3800
NitrogenN668
OxygenO734
SulphurS20

FormulaC2485H3800N668O734S20
Total Number of Atoms:7707


Total number of positively charged residues (ARG + LYS):47
Total number of negatively charged residues (ASP + GLU):45
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    77615
Absorption 0.1% (=1 g/l)    1.401,   assuming all pairs of CYS residues form cystines

Ext. coefficient    77240
Absorption 0.1% (=1 g/l)    1.394,   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 : 40.98

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.34, 28.74, 24.15]

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:77.3452
Grand average of hydropathicity (GRAVY):-0.25