Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5731
Number of amino acids:273
Molecular Weight:28175.71 Da
Theoretical pI:5.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2910.62%
Cysteine CYS (C)103.66%
Glutamic Acid GLU (E)62.2%
Aspartic Acid ASP (D)155.49%
Glycine GLY (G)4014.65%
Phynylalanine PHE (F)62.2%
Isoleucine ILE (I)82.93%
Histidine HIS (H)31.1%
Lysine LYS (K)93.3%
Methionine MET (M)62.2%
Leucine LEU (L)196.96%
Asparagine ASN (N)82.93%
Glutamine GLN (Q)134.76%
Proline PRO (P)176.23%
Serine SER (S)2810.26%
Arginine ARG (R)103.66%
Threonine THR (T)82.93%
Tryptophan TRP (W)72.56%
Valine VAL (V)228.06%
Tyrosine TYR (Y)93.3%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1231
HydrogenH1904
NitrogenN346
OxygenO382
SulphurS16

FormulaC1231H1904N346O382S16
Total Number of Atoms:3879


Total number of positively charged residues (ARG + LYS):19
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    52535
Absorption 0.1% (=1 g/l)    1.865,   assuming all pairs of CYS residues form cystines

Ext. coefficient    51910
Absorption 0.1% (=1 g/l)    1.842,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.91

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.01, 34.07, 21.98]

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:72.5641
Grand average of hydropathicity (GRAVY):-0.07