Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1389
Number of amino acids:224
Molecular Weight:24144.26 Da
Theoretical pI:6.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)167.14%
Cysteine CYS (C)167.14%
Glutamic Acid GLU (E)73.13%
Aspartic Acid ASP (D)114.91%
Glycine GLY (G)229.82%
Phynylalanine PHE (F)167.14%
Isoleucine ILE (I)104.46%
Histidine HIS (H)20.89%
Lysine LYS (K)104.46%
Methionine MET (M)31.34%
Leucine LEU (L)94.02%
Asparagine ASN (N)156.7%
Glutamine GLN (Q)73.13%
Proline PRO (P)198.48%
Serine SER (S)156.7%
Arginine ARG (R)83.57%
Threonine THR (T)198.48%
Tryptophan TRP (W)31.34%
Valine VAL (V)104.46%
Tyrosine TYR (Y)62.68%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1060
HydrogenH1603
NitrogenN287
OxygenO323
SulphurS19

FormulaC1060H1603N287O323S19
Total Number of Atoms:3292


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    26440
Absorption 0.1% (=1 g/l)    1.095,   assuming all pairs of CYS residues form cystines

Ext. coefficient    25440
Absorption 0.1% (=1 g/l)    1.054,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.47

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.11, 31.70, 15.62]

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:53.1697
Grand average of hydropathicity (GRAVY):-0.25