Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5217
Number of amino acids:255
Molecular Weight:27380.8 Da
Theoretical pI:5.1


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)239.02%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)62.35%
Aspartic Acid ASP (D)155.88%
Glycine GLY (G)135.1%
Phynylalanine PHE (F)187.06%
Isoleucine ILE (I)135.1%
Histidine HIS (H)31.18%
Lysine LYS (K)103.92%
Methionine MET (M)51.96%
Leucine LEU (L)2710.59%
Asparagine ASN (N)176.67%
Glutamine GLN (Q)124.71%
Proline PRO (P)155.88%
Serine SER (S)3714.51%
Arginine ARG (R)62.35%
Threonine THR (T)166.27%
Tryptophan TRP (W)20.78%
Valine VAL (V)145.49%
Tyrosine TYR (Y)31.18%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1223
HydrogenH1906
NitrogenN320
OxygenO383
SulphurS5

FormulaC1223H1906N320O383S5
Total Number of Atoms:3837


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    15470
Absorption 0.1% (=1 g/l)    0.565
Aromaticity:0.090

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 57.84

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.20, 32.16, 23.92]

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:86.1175
Grand average of hydropathicity (GRAVY):-0.02