Physicochemical Properties of Peptide



PPepDB ID:PPepDB_555
Number of amino acids:12
Molecular Weight:1370.48 Da
Theoretical pI:4.37


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)18.33%
Aspartic Acid ASP (D)18.33%
Glycine GLY (G)216.67%
Phynylalanine PHE (F)216.67%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)00%
Glutamine GLN (Q)00%
Proline PRO (P)216.67%
Serine SER (S)18.33%
Arginine ARG (R)18.33%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)18.33%
Tyrosine TYR (Y)18.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC64
HydrogenH87
NitrogenN15
OxygenO19
SulphurS0

FormulaC64H87N15O19S0
Total Number of Atoms:185


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):2
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    1490
Absorption 0.1% (=1 g/l)    1.087
Aromaticity:0.250

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 84.78

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 41.67, 8.33]

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:24.1667
Grand average of hydropathicity (GRAVY):-0.65