Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5203
Number of amino acids:398
Molecular Weight:43664.62 Da
Theoretical pI:6.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)338.29%
Cysteine CYS (C)123.02%
Glutamic Acid GLU (E)123.02%
Aspartic Acid ASP (D)297.29%
Glycine GLY (G)328.04%
Phynylalanine PHE (F)153.77%
Isoleucine ILE (I)276.78%
Histidine HIS (H)123.02%
Lysine LYS (K)205.03%
Methionine MET (M)92.26%
Leucine LEU (L)328.04%
Asparagine ASN (N)276.78%
Glutamine GLN (Q)164.02%
Proline PRO (P)164.02%
Serine SER (S)256.28%
Arginine ARG (R)194.77%
Threonine THR (T)225.53%
Tryptophan TRP (W)71.76%
Valine VAL (V)266.53%
Tyrosine TYR (Y)71.76%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1916
HydrogenH3017
NitrogenN549
OxygenO578
SulphurS21

FormulaC1916H3017N549O578S21
Total Number of Atoms:6081


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    49680
Absorption 0.1% (=1 g/l)    1.138,   assuming all pairs of CYS residues form cystines

Ext. coefficient    48930
Absorption 0.1% (=1 g/l)    1.121,   assuming all CYS residues are reduced
Aromaticity:0.073

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.99

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.64, 25.13, 21.61]

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:85.0502
Grand average of hydropathicity (GRAVY):-0.21