Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1026
Number of amino acids:246
Molecular Weight:26028.01 Da
Theoretical pI:6.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)156.1%
Cysteine CYS (C)197.72%
Glutamic Acid GLU (E)72.85%
Aspartic Acid ASP (D)124.88%
Glycine GLY (G)3012.2%
Phynylalanine PHE (F)135.28%
Isoleucine ILE (I)114.47%
Histidine HIS (H)41.63%
Lysine LYS (K)135.28%
Methionine MET (M)41.63%
Leucine LEU (L)228.94%
Asparagine ASN (N)104.07%
Glutamine GLN (Q)41.63%
Proline PRO (P)124.88%
Serine SER (S)208.13%
Arginine ARG (R)62.44%
Threonine THR (T)166.5%
Tryptophan TRP (W)31.22%
Valine VAL (V)187.32%
Tyrosine TYR (Y)72.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1148
HydrogenH1786
NitrogenN302
OxygenO342
SulphurS23

FormulaC1148H1786N302O342S23
Total Number of Atoms:3601


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    28055
Absorption 0.1% (=1 g/l)    1.078,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26930
Absorption 0.1% (=1 g/l)    1.035,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.35

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.08, 29.27, 19.51]

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:79.6341
Grand average of hydropathicity (GRAVY):0.21