Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2644
Number of amino acids:33
Molecular Weight:3821.66 Da
Theoretical pI:9.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)26.06%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)26.06%
Aspartic Acid ASP (D)00%
Glycine GLY (G)13.03%
Phynylalanine PHE (F)515.15%
Isoleucine ILE (I)412.12%
Histidine HIS (H)00%
Lysine LYS (K)39.09%
Methionine MET (M)13.03%
Leucine LEU (L)412.12%
Asparagine ASN (N)00%
Glutamine GLN (Q)00%
Proline PRO (P)26.06%
Serine SER (S)26.06%
Arginine ARG (R)13.03%
Threonine THR (T)39.09%
Tryptophan TRP (W)00%
Valine VAL (V)26.06%
Tyrosine TYR (Y)13.03%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC187
HydrogenH291
NitrogenN39
OxygenO44
SulphurS1

FormulaC187H291N39O44S1
Total Number of Atoms:562


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)    0.390
Aromaticity:0.182

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 15.11

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[48.48, 15.15, 27.27]

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:118.182
Grand average of hydropathicity (GRAVY):0.89