Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2653
Number of amino acids:12
Molecular Weight:1390.63 Da
Theoretical pI:5.22


Amino Acid Composition:


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


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC61
HydrogenH95
NitrogenN15
OxygenO18
SulphurS2

FormulaC61H95N15O18S2
Total Number of Atoms:191


Total number of positively charged residues (ARG + LYS):0
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)    3.955,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    3.955,   assuming all CYS residues are reduced
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.83

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 16.67, 33.33]

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:97.5001
Grand average of hydropathicity (GRAVY):0.53