Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4906
Number of amino acids:313
Molecular Weight:36117.56 Da
Theoretical pI:8.59


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)144.47%
Cysteine CYS (C)61.92%
Glutamic Acid GLU (E)41.28%
Aspartic Acid ASP (D)10.32%
Glycine GLY (G)51.6%
Phynylalanine PHE (F)123.83%
Isoleucine ILE (I)144.47%
Histidine HIS (H)61.92%
Lysine LYS (K)30.96%
Methionine MET (M)30.96%
Leucine LEU (L)268.31%
Asparagine ASN (N)72.24%
Glutamine GLN (Q)11536.74%
Proline PRO (P)4313.74%
Serine SER (S)175.43%
Arginine ARG (R)51.6%
Threonine THR (T)103.19%
Tryptophan TRP (W)00%
Valine VAL (V)144.47%
Tyrosine TYR (Y)82.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1592
HydrogenH2479
NitrogenN465
OxygenO481
SulphurS9

FormulaC1592H2479N465O481S9
Total Number of Atoms:5026


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    12295
Absorption 0.1% (=1 g/l)    0.340,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11920
Absorption 0.1% (=1 g/l)    0.330,   assuming all CYS residues are reduced
Aromaticity:0.064

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 122.25

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.64, 23.00, 15.02]

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:67.2843
Grand average of hydropathicity (GRAVY):-0.96