Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6138
Number of amino acids:161
Molecular Weight:17676.94 Da
Theoretical pI:9.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)159.32%
Cysteine CYS (C)63.73%
Glutamic Acid GLU (E)53.11%
Aspartic Acid ASP (D)53.11%
Glycine GLY (G)1811.18%
Phynylalanine PHE (F)31.86%
Isoleucine ILE (I)42.48%
Histidine HIS (H)31.86%
Lysine LYS (K)53.11%
Methionine MET (M)31.86%
Leucine LEU (L)106.21%
Asparagine ASN (N)148.7%
Glutamine GLN (Q)63.73%
Proline PRO (P)63.73%
Serine SER (S)116.83%
Arginine ARG (R)116.83%
Threonine THR (T)42.48%
Tryptophan TRP (W)42.48%
Valine VAL (V)1710.56%
Tyrosine TYR (Y)116.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC777
HydrogenH1191
NitrogenN229
OxygenO228
SulphurS9

FormulaC777H1191N229O228S9
Total Number of Atoms:2434


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    38765
Absorption 0.1% (=1 g/l)    2.193,   assuming all pairs of CYS residues form cystines

Ext. coefficient    38390
Absorption 0.1% (=1 g/l)    2.172,   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 : 26.77

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.43, 30.43, 20.50]

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:73.8509
Grand average of hydropathicity (GRAVY):-0.29