Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1127
Number of amino acids:238
Molecular Weight:25739.79 Da
Theoretical pI:4.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.72%
Cysteine CYS (C)177.14%
Glutamic Acid GLU (E)93.78%
Aspartic Acid ASP (D)125.04%
Glycine GLY (G)239.66%
Phynylalanine PHE (F)177.14%
Isoleucine ILE (I)114.62%
Histidine HIS (H)31.26%
Lysine LYS (K)83.36%
Methionine MET (M)20.84%
Leucine LEU (L)166.72%
Asparagine ASN (N)156.3%
Glutamine GLN (Q)104.2%
Proline PRO (P)135.46%
Serine SER (S)218.82%
Arginine ARG (R)31.26%
Threonine THR (T)197.98%
Tryptophan TRP (W)31.26%
Valine VAL (V)93.78%
Tyrosine TYR (Y)114.62%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1138
HydrogenH1689
NitrogenN289
OxygenO357
SulphurS19

FormulaC1138H1689N289O357S19
Total Number of Atoms:3492


Total number of positively charged residues (ARG + LYS):11
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    33890
Absorption 0.1% (=1 g/l)    1.317,   assuming all pairs of CYS residues form cystines

Ext. coefficient    32890
Absorption 0.1% (=1 g/l)    1.278,   assuming all CYS residues are reduced
Aromaticity:0.130

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.83

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.15, 30.25, 18.07]

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:61.9328
Grand average of hydropathicity (GRAVY):-0.09