Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5100
Number of amino acids:662
Molecular Weight:74586.38 Da
Theoretical pI:8.36


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)355.29%
Cysteine CYS (C)152.27%
Glutamic Acid GLU (E)365.44%
Aspartic Acid ASP (D)324.83%
Glycine GLY (G)507.55%
Phynylalanine PHE (F)456.8%
Isoleucine ILE (I)426.34%
Histidine HIS (H)101.51%
Lysine LYS (K)345.14%
Methionine MET (M)142.11%
Leucine LEU (L)639.52%
Asparagine ASN (N)355.29%
Glutamine GLN (Q)203.02%
Proline PRO (P)284.23%
Serine SER (S)578.61%
Arginine ARG (R)395.89%
Threonine THR (T)345.14%
Tryptophan TRP (W)71.06%
Valine VAL (V)406.04%
Tyrosine TYR (Y)263.93%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3359
HydrogenH5199
NitrogenN895
OxygenO971
SulphurS29

FormulaC3359H5199N895O971S29
Total Number of Atoms:10453


Total number of positively charged residues (ARG + LYS):73
Total number of negatively charged residues (ASP + GLU):68
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    78115
Absorption 0.1% (=1 g/l)    1.047,   assuming all pairs of CYS residues form cystines

Ext. coefficient    77240
Absorption 0.1% (=1 g/l)    1.036,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.02

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.69, 25.68, 22.36]

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:84.6677
Grand average of hydropathicity (GRAVY):-0.14