Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5173
Number of amino acids:658
Molecular Weight:73937.62 Da
Theoretical pI:6.19


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)385.78%
Cysteine CYS (C)172.58%
Glutamic Acid GLU (E)365.47%
Aspartic Acid ASP (D)335.02%
Glycine GLY (G)426.38%
Phynylalanine PHE (F)385.78%
Isoleucine ILE (I)517.75%
Histidine HIS (H)111.67%
Lysine LYS (K)253.8%
Methionine MET (M)121.82%
Leucine LEU (L)598.97%
Asparagine ASN (N)345.17%
Glutamine GLN (Q)253.8%
Proline PRO (P)324.86%
Serine SER (S)527.9%
Arginine ARG (R)395.93%
Threonine THR (T)406.08%
Tryptophan TRP (W)81.22%
Valine VAL (V)446.69%
Tyrosine TYR (Y)223.34%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3316
HydrogenH5167
NitrogenN889
OxygenO970
SulphurS29

FormulaC3316H5167N889O970S29
Total Number of Atoms:10371


Total number of positively charged residues (ARG + LYS):64
Total number of negatively charged residues (ASP + GLU):69
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    77780
Absorption 0.1% (=1 g/l)    1.052,   assuming all pairs of CYS residues form cystines

Ext. coefficient    76780
Absorption 0.1% (=1 g/l)    1.038,   assuming all CYS residues are reduced
Aromaticity:0.103

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.60

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.74, 24.32, 22.04]

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:90.3648
Grand average of hydropathicity (GRAVY):-0.08