Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4104
Number of amino acids:292
Molecular Weight:33692.18 Da
Theoretical pI:6.73


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)217.19%
Cysteine CYS (C)72.4%
Glutamic Acid GLU (E)144.79%
Aspartic Acid ASP (D)196.51%
Glycine GLY (G)175.82%
Phynylalanine PHE (F)175.82%
Isoleucine ILE (I)144.79%
Histidine HIS (H)72.4%
Lysine LYS (K)144.79%
Methionine MET (M)82.74%
Leucine LEU (L)165.48%
Asparagine ASN (N)113.77%
Glutamine GLN (Q)82.74%
Proline PRO (P)196.51%
Serine SER (S)206.85%
Arginine ARG (R)186.16%
Threonine THR (T)175.82%
Tryptophan TRP (W)93.08%
Valine VAL (V)186.16%
Tyrosine TYR (Y)186.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1529
HydrogenH2270
NitrogenN402
OxygenO433
SulphurS15

FormulaC1529H2270N402O433S15
Total Number of Atoms:4649


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):33
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    76695
Absorption 0.1% (=1 g/l)    2.276,   assuming all pairs of CYS residues form cystines

Ext. coefficient    76320
Absorption 0.1% (=1 g/l)    2.265,   assuming all CYS residues are reduced
Aromaticity:0.151

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 57.51

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.51, 22.95, 20.21]

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:65.137
Grand average of hydropathicity (GRAVY):-0.41