Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4820
Number of amino acids:253
Molecular Weight:27076.68 Da
Theoretical pI:9.32


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)259.88%
Cysteine CYS (C)103.95%
Glutamic Acid GLU (E)10.4%
Aspartic Acid ASP (D)62.37%
Glycine GLY (G)3313.04%
Phynylalanine PHE (F)155.93%
Isoleucine ILE (I)83.16%
Histidine HIS (H)62.37%
Lysine LYS (K)51.98%
Methionine MET (M)72.77%
Leucine LEU (L)166.32%
Asparagine ASN (N)218.3%
Glutamine GLN (Q)124.74%
Proline PRO (P)103.95%
Serine SER (S)197.51%
Arginine ARG (R)124.74%
Threonine THR (T)145.53%
Tryptophan TRP (W)72.77%
Valine VAL (V)187.11%
Tyrosine TYR (Y)83.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1198
HydrogenH1810
NitrogenN346
OxygenO342
SulphurS17

FormulaC1198H1810N346O342S17
Total Number of Atoms:3713


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    51045
Absorption 0.1% (=1 g/l)    1.885,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50420
Absorption 0.1% (=1 g/l)    1.862,   assuming all CYS residues are reduced
Aromaticity:0.119

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.37

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.46, 32.81, 19.37]

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:67.5099
Grand average of hydropathicity (GRAVY):-0.02