Physicochemical Properties of Peptide



PPepDB ID:PPepDB_853
Number of amino acids:246
Molecular Weight:25442.55 Da
Theoretical pI:4.94


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)239.35%
Cysteine CYS (C)166.5%
Glutamic Acid GLU (E)41.63%
Aspartic Acid ASP (D)114.47%
Glycine GLY (G)2911.79%
Phynylalanine PHE (F)156.1%
Isoleucine ILE (I)114.47%
Histidine HIS (H)31.22%
Lysine LYS (K)72.85%
Methionine MET (M)52.03%
Leucine LEU (L)114.47%
Asparagine ASN (N)104.07%
Glutamine GLN (Q)52.03%
Proline PRO (P)145.69%
Serine SER (S)2911.79%
Arginine ARG (R)31.22%
Threonine THR (T)249.76%
Tryptophan TRP (W)31.22%
Valine VAL (V)135.28%
Tyrosine TYR (Y)104.07%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1115
HydrogenH1678
NitrogenN286
OxygenO355
SulphurS21

FormulaC1115H1678N286O355S21
Total Number of Atoms:3455


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    32400
Absorption 0.1% (=1 g/l)    1.273,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.234,   assuming all CYS residues are reduced
Aromaticity:0.114

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.97

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.61, 33.33, 17.48]

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:59.5528
Grand average of hydropathicity (GRAVY):0.14