Physicochemical Properties of Peptide



PPepDB ID:PPepDB_967
Number of amino acids:229
Molecular Weight:23396.49 Da
Theoretical pI:7.82


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3615.72%
Cysteine CYS (C)177.42%
Glutamic Acid GLU (E)20.87%
Aspartic Acid ASP (D)156.55%
Glycine GLY (G)2410.48%
Phynylalanine PHE (F)125.24%
Isoleucine ILE (I)83.49%
Histidine HIS (H)10.44%
Lysine LYS (K)93.93%
Methionine MET (M)20.87%
Leucine LEU (L)125.24%
Asparagine ASN (N)52.18%
Glutamine GLN (Q)31.31%
Proline PRO (P)146.11%
Serine SER (S)219.17%
Arginine ARG (R)104.37%
Threonine THR (T)187.86%
Tryptophan TRP (W)20.87%
Valine VAL (V)114.8%
Tyrosine TYR (Y)73.06%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1015
HydrogenH1574
NitrogenN280
OxygenO318
SulphurS19

FormulaC1015H1574N280O318S19
Total Number of Atoms:3206


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    22430
Absorption 0.1% (=1 g/l)    0.959,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21430
Absorption 0.1% (=1 g/l)    0.916,   assuming all CYS residues are reduced
Aromaticity:0.092

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.22

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.71, 27.95, 22.71]

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:63.7117
Grand average of hydropathicity (GRAVY):0.13