Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4719
Number of amino acids:287
Molecular Weight:32740.16 Da
Theoretical pI:8.63


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)186.27%
Cysteine CYS (C)62.09%
Glutamic Acid GLU (E)113.83%
Aspartic Acid ASP (D)155.23%
Glycine GLY (G)227.67%
Phynylalanine PHE (F)217.32%
Isoleucine ILE (I)134.53%
Histidine HIS (H)41.39%
Lysine LYS (K)196.62%
Methionine MET (M)82.79%
Leucine LEU (L)206.97%
Asparagine ASN (N)206.97%
Glutamine GLN (Q)93.14%
Proline PRO (P)124.18%
Serine SER (S)217.32%
Arginine ARG (R)113.83%
Threonine THR (T)206.97%
Tryptophan TRP (W)113.83%
Valine VAL (V)144.88%
Tyrosine TYR (Y)124.18%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1489
HydrogenH2217
NitrogenN387
OxygenO422
SulphurS14

FormulaC1489H2217N387O422S14
Total Number of Atoms:4529


Total number of positively charged residues (ARG + LYS):30
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    78755
Absorption 0.1% (=1 g/l)    2.405,   assuming all pairs of CYS residues form cystines

Ext. coefficient    78380
Absorption 0.1% (=1 g/l)    2.394,   assuming all CYS residues are reduced
Aromaticity:0.153

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.71, 26.13, 19.86]

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:65.2613
Grand average of hydropathicity (GRAVY):-0.34