Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3635
Number of amino acids:21
Molecular Weight:2387.41 Da
Theoretical pI:3.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)314.29%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)29.52%
Aspartic Acid ASP (D)419.05%
Glycine GLY (G)14.76%
Phynylalanine PHE (F)14.76%
Isoleucine ILE (I)00%
Histidine HIS (H)14.76%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)00%
Glutamine GLN (Q)14.76%
Proline PRO (P)14.76%
Serine SER (S)14.76%
Arginine ARG (R)14.76%
Threonine THR (T)29.52%
Tryptophan TRP (W)00%
Valine VAL (V)14.76%
Tyrosine TYR (Y)29.52%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC102
HydrogenH143
NitrogenN27
OxygenO40
SulphurS0

FormulaC102H143N27O40S0
Total Number of Atoms:312


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):6
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    2980
Absorption 0.1% (=1 g/l)    1.248
Aromaticity:0.143

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 61.38

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[19.05, 14.29, 23.81]

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:28.0952
Grand average of hydropathicity (GRAVY):-1.27