Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4612
Number of amino acids:267
Molecular Weight:30796.88 Da
Theoretical pI:8.63


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)93.37%
Cysteine CYS (C)51.87%
Glutamic Acid GLU (E)103.75%
Aspartic Acid ASP (D)145.24%
Glycine GLY (G)197.12%
Phynylalanine PHE (F)134.87%
Isoleucine ILE (I)124.49%
Histidine HIS (H)31.12%
Lysine LYS (K)186.74%
Methionine MET (M)72.62%
Leucine LEU (L)197.12%
Asparagine ASN (N)145.24%
Glutamine GLN (Q)176.37%
Proline PRO (P)134.87%
Serine SER (S)217.87%
Arginine ARG (R)103.75%
Threonine THR (T)197.12%
Tryptophan TRP (W)62.25%
Valine VAL (V)176.37%
Tyrosine TYR (Y)217.87%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1395
HydrogenH2098
NitrogenN358
OxygenO408
SulphurS12

FormulaC1395H2098N358O408S12
Total Number of Atoms:4271


Total number of positively charged residues (ARG + LYS):28
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    64540
Absorption 0.1% (=1 g/l)    2.096,   assuming all pairs of CYS residues form cystines

Ext. coefficient    64290
Absorption 0.1% (=1 g/l)    2.088,   assuming all CYS residues are reduced
Aromaticity:0.150

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.72

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.96, 25.09, 16.85]

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:67.1161
Grand average of hydropathicity (GRAVY):-0.50