Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4254
Number of amino acids:672
Molecular Weight:74669.6 Da
Theoretical pI:8.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)426.25%
Cysteine CYS (C)202.98%
Glutamic Acid GLU (E)213.13%
Aspartic Acid ASP (D)395.8%
Glycine GLY (G)527.74%
Phynylalanine PHE (F)375.51%
Isoleucine ILE (I)324.76%
Histidine HIS (H)101.49%
Lysine LYS (K)476.99%
Methionine MET (M)233.42%
Leucine LEU (L)466.85%
Asparagine ASN (N)456.7%
Glutamine GLN (Q)213.13%
Proline PRO (P)558.18%
Serine SER (S)456.7%
Arginine ARG (R)284.17%
Threonine THR (T)385.65%
Tryptophan TRP (W)131.93%
Valine VAL (V)385.65%
Tyrosine TYR (Y)202.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3337
HydrogenH5144
NitrogenN902
OxygenO962
SulphurS43

FormulaC3337H5144N902O962S43
Total Number of Atoms:10388


Total number of positively charged residues (ARG + LYS):75
Total number of negatively charged residues (ASP + GLU):60
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    102550
Absorption 0.1% (=1 g/l)    1.373,   assuming all pairs of CYS residues form cystines

Ext. coefficient    101300
Absorption 0.1% (=1 g/l)    1.357,   assuming all CYS residues are reduced
Aromaticity:0.104

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.68, 29.32, 19.64]

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:67.9167
Grand average of hydropathicity (GRAVY):-0.36