Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3662
Number of amino acids:20
Molecular Weight:2360.74 Da
Theoretical pI:9.7


Amino Acid Composition:


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


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC110
HydrogenH170
NitrogenN30
OxygenO28
SulphurS0

FormulaC110H170N30O28S0
Total Number of Atoms:338


Total number of positively charged residues (ARG + LYS):3
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)    0.631
Aromaticity:0.150

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 19.21

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[45.00, 15.00, 5.00]

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:102
Grand average of hydropathicity (GRAVY):0.20