Physicochemical Properties of Peptide



PPepDB ID:PPepDB_914
Number of amino acids:255
Molecular Weight:24869.89 Da
Theoretical pI:6.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)5120%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)20.78%
Aspartic Acid ASP (D)103.92%
Glycine GLY (G)3714.51%
Phynylalanine PHE (F)93.53%
Isoleucine ILE (I)10.39%
Histidine HIS (H)20.78%
Lysine LYS (K)20.78%
Methionine MET (M)62.35%
Leucine LEU (L)207.84%
Asparagine ASN (N)93.53%
Glutamine GLN (Q)41.57%
Proline PRO (P)155.88%
Serine SER (S)2610.2%
Arginine ARG (R)93.53%
Threonine THR (T)155.88%
Tryptophan TRP (W)31.18%
Valine VAL (V)103.92%
Tyrosine TYR (Y)83.14%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1064
HydrogenH1642
NitrogenN304
OxygenO342
SulphurS22

FormulaC1064H1642N304O342S22
Total Number of Atoms:3374


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29420
Absorption 0.1% (=1 g/l)    1.183,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.143,   assuming all CYS residues are reduced
Aromaticity:0.078

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.64

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.00, 34.12, 30.98]

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:63.4902
Grand average of hydropathicity (GRAVY):0.26