Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1272
Number of amino acids:154
Molecular Weight:16366.15 Da
Theoretical pI:4.79


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)117.14%
Cysteine CYS (C)95.84%
Glutamic Acid GLU (E)21.3%
Aspartic Acid ASP (D)95.84%
Glycine GLY (G)1610.39%
Phynylalanine PHE (F)85.19%
Isoleucine ILE (I)53.25%
Histidine HIS (H)10.65%
Lysine LYS (K)53.25%
Methionine MET (M)10.65%
Leucine LEU (L)95.84%
Asparagine ASN (N)1610.39%
Glutamine GLN (Q)63.9%
Proline PRO (P)127.79%
Serine SER (S)95.84%
Arginine ARG (R)31.95%
Threonine THR (T)1811.69%
Tryptophan TRP (W)42.6%
Valine VAL (V)74.55%
Tyrosine TYR (Y)31.95%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC712
HydrogenH1076
NitrogenN196
OxygenO229
SulphurS10

FormulaC712H1076N196O229S10
Total Number of Atoms:2223


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    26970
Absorption 0.1% (=1 g/l)    1.648,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26470
Absorption 0.1% (=1 g/l)    1.617,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.36

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.38, 34.42, 14.94]

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:55.7792
Grand average of hydropathicity (GRAVY):-0.34