Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5638
Number of amino acids:120
Molecular Weight:12901.82 Da
Theoretical pI:9.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1815%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)43.33%
Aspartic Acid ASP (D)43.33%
Glycine GLY (G)97.5%
Phynylalanine PHE (F)21.67%
Isoleucine ILE (I)43.33%
Histidine HIS (H)21.67%
Lysine LYS (K)54.17%
Methionine MET (M)10.83%
Leucine LEU (L)1210%
Asparagine ASN (N)65%
Glutamine GLN (Q)86.67%
Proline PRO (P)10.83%
Serine SER (S)65%
Arginine ARG (R)75.83%
Threonine THR (T)75.83%
Tryptophan TRP (W)32.5%
Valine VAL (V)1815%
Tyrosine TYR (Y)32.5%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC576
HydrogenH933
NitrogenN167
OxygenO167
SulphurS1

FormulaC576H933N167O167S1
Total Number of Atoms:1844


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):8
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    20970
Absorption 0.1% (=1 g/l)    1.625
Aromaticity:0.067

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.02

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.00, 18.33, 29.17]

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:110.5
Grand average of hydropathicity (GRAVY):0.19