Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4751
Number of amino acids:248
Molecular Weight:25064.85 Da
Theoretical pI:7.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3714.92%
Cysteine CYS (C)83.23%
Glutamic Acid GLU (E)41.61%
Aspartic Acid ASP (D)83.23%
Glycine GLY (G)4016.13%
Phynylalanine PHE (F)114.44%
Isoleucine ILE (I)31.21%
Histidine HIS (H)31.21%
Lysine LYS (K)20.81%
Methionine MET (M)52.02%
Leucine LEU (L)145.65%
Asparagine ASN (N)135.24%
Glutamine GLN (Q)93.63%
Proline PRO (P)93.63%
Serine SER (S)228.87%
Arginine ARG (R)114.44%
Threonine THR (T)176.85%
Tryptophan TRP (W)62.42%
Valine VAL (V)197.66%
Tyrosine TYR (Y)72.82%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1089
HydrogenH1659
NitrogenN317
OxygenO341
SulphurS13

FormulaC1089H1659N317O341S13
Total Number of Atoms:3419


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    43930
Absorption 0.1% (=1 g/l)    1.753,   assuming all pairs of CYS residues form cystines

Ext. coefficient    43430
Absorption 0.1% (=1 g/l)    1.733,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.97

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.19, 33.87, 24.19]

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:63.871
Grand average of hydropathicity (GRAVY):0.05