Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5123
Number of amino acids:224
Molecular Weight:23456.58 Da
Theoretical pI:5.45


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3314.73%
Cysteine CYS (C)62.68%
Glutamic Acid GLU (E)114.91%
Aspartic Acid ASP (D)125.36%
Glycine GLY (G)208.93%
Phynylalanine PHE (F)73.13%
Isoleucine ILE (I)73.13%
Histidine HIS (H)20.89%
Lysine LYS (K)135.8%
Methionine MET (M)31.34%
Leucine LEU (L)208.93%
Asparagine ASN (N)94.02%
Glutamine GLN (Q)73.13%
Proline PRO (P)114.91%
Serine SER (S)198.48%
Arginine ARG (R)73.13%
Threonine THR (T)94.02%
Tryptophan TRP (W)20.89%
Valine VAL (V)188.04%
Tyrosine TYR (Y)83.57%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1035
HydrogenH1634
NitrogenN280
OxygenO323
SulphurS9

FormulaC1035H1634N280O323S9
Total Number of Atoms:3281


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    23295
Absorption 0.1% (=1 g/l)    0.993,   assuming all pairs of CYS residues form cystines

Ext. coefficient    22920
Absorption 0.1% (=1 g/l)    0.977,   assuming all CYS residues are reduced
Aromaticity:0.076

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.22

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.68, 26.34, 29.91]

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:85.0446
Grand average of hydropathicity (GRAVY):-0.01