Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5810
Number of amino acids:284
Molecular Weight:32175.36 Da
Theoretical pI:5.24


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)155.28%
Cysteine CYS (C)62.11%
Glutamic Acid GLU (E)93.17%
Aspartic Acid ASP (D)175.99%
Glycine GLY (G)217.39%
Phynylalanine PHE (F)175.99%
Isoleucine ILE (I)124.23%
Histidine HIS (H)20.7%
Lysine LYS (K)175.99%
Methionine MET (M)82.82%
Leucine LEU (L)279.51%
Asparagine ASN (N)238.1%
Glutamine GLN (Q)113.87%
Proline PRO (P)93.17%
Serine SER (S)238.1%
Arginine ARG (R)51.76%
Threonine THR (T)238.1%
Tryptophan TRP (W)113.87%
Valine VAL (V)144.93%
Tyrosine TYR (Y)144.93%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1459
HydrogenH2177
NitrogenN365
OxygenO431
SulphurS14

FormulaC1459H2177N365O431S14
Total Number of Atoms:4446


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):26
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    81735
Absorption 0.1% (=1 g/l)    2.540,   assuming all pairs of CYS residues form cystines

Ext. coefficient    81360
Absorption 0.1% (=1 g/l)    2.529,   assuming all CYS residues are reduced
Aromaticity:0.148

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.45, 26.76, 20.77]

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:73.1338
Grand average of hydropathicity (GRAVY):-0.25