Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3648
Number of amino acids:20
Molecular Weight:2103.36 Da
Theoretical pI:5.66


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)15%
Aspartic Acid ASP (D)00%
Glycine GLY (G)315%
Phynylalanine PHE (F)15%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)15%
Methionine MET (M)00%
Leucine LEU (L)15%
Asparagine ASN (N)00%
Glutamine GLN (Q)210%
Proline PRO (P)420%
Serine SER (S)15%
Arginine ARG (R)00%
Threonine THR (T)315%
Tryptophan TRP (W)00%
Valine VAL (V)210%
Tyrosine TYR (Y)15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC96
HydrogenH147
NitrogenN23
OxygenO30
SulphurS0

FormulaC96H147N23O30S0
Total Number of Atoms:296


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):1
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)    0.708
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 75.32

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.00, 40.00, 10.00]

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:48.5
Grand average of hydropathicity (GRAVY):-0.56