Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3646
Number of amino acids:12
Molecular Weight:1399.65 Da
Theoretical pI:5.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)18.33%
Glycine GLY (G)00%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)325%
Asparagine ASN (N)00%
Glutamine GLN (Q)00%
Proline PRO (P)18.33%
Serine SER (S)18.33%
Arginine ARG (R)18.33%
Threonine THR (T)216.67%
Tryptophan TRP (W)18.33%
Valine VAL (V)216.67%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC65
HydrogenH106
NitrogenN16
OxygenO18
SulphurS0

FormulaC65H106N16O18S0
Total Number of Atoms:205


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

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    3.930
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 97.97

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[50.00, 16.67, 25.00]

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:145.833
Grand average of hydropathicity (GRAVY):0.59