Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4582
Number of amino acids:329
Molecular Weight:36669.92 Da
Theoretical pI:5.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)216.38%
Cysteine CYS (C)82.43%
Glutamic Acid GLU (E)195.78%
Aspartic Acid ASP (D)288.51%
Glycine GLY (G)206.08%
Phynylalanine PHE (F)185.47%
Isoleucine ILE (I)133.95%
Histidine HIS (H)30.91%
Lysine LYS (K)164.86%
Methionine MET (M)113.34%
Leucine LEU (L)3711.25%
Asparagine ASN (N)123.65%
Glutamine GLN (Q)103.04%
Proline PRO (P)154.56%
Serine SER (S)288.51%
Arginine ARG (R)226.69%
Threonine THR (T)154.56%
Tryptophan TRP (W)10.3%
Valine VAL (V)257.6%
Tyrosine TYR (Y)72.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1613
HydrogenH2568
NitrogenN440
OxygenO496
SulphurS19

FormulaC1613H2568N440O496S19
Total Number of Atoms:5136


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):47
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    16430
Absorption 0.1% (=1 g/l)    0.448,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15930
Absorption 0.1% (=1 g/l)    0.434,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.51

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.70, 22.80, 26.75]

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:87.69
Grand average of hydropathicity (GRAVY):-0.17