Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3599
Number of amino acids:20
Molecular Weight:2327.5 Da
Theoretical pI:10.67


Amino Acid Composition:


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


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC95
HydrogenH155
NitrogenN37
OxygenO32
SulphurS0

FormulaC95H155N37O32S0
Total Number of Atoms:319


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):2
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)    0.640
Aromaticity:0.050

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.69

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[15.00, 35.00, 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:44
Grand average of hydropathicity (GRAVY):-1.79