Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6028
Number of amino acids:146
Molecular Weight:16910.77 Da
Theoretical pI:5.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)117.53%
Cysteine CYS (C)85.48%
Glutamic Acid GLU (E)1812.33%
Aspartic Acid ASP (D)10.68%
Glycine GLY (G)85.48%
Phynylalanine PHE (F)21.37%
Isoleucine ILE (I)32.05%
Histidine HIS (H)32.05%
Lysine LYS (K)10.68%
Methionine MET (M)2215.07%
Leucine LEU (L)96.16%
Asparagine ASN (N)32.05%
Glutamine GLN (Q)138.9%
Proline PRO (P)74.79%
Serine SER (S)85.48%
Arginine ARG (R)1610.96%
Threonine THR (T)64.11%
Tryptophan TRP (W)00%
Valine VAL (V)53.42%
Tyrosine TYR (Y)21.37%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC690
HydrogenH1141
NitrogenN217
OxygenO217
SulphurS30

FormulaC690H1141N217O217S30
Total Number of Atoms:2295


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):19
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    3480
Absorption 0.1% (=1 g/l)    0.206,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.176,   assuming all CYS residues are reduced
Aromaticity:0.027

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 74.13

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.38, 17.81, 41.10]

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:49.5205
Grand average of hydropathicity (GRAVY):-0.55