Physicochemical Properties of Peptide



PPepDB ID:PPepDB_726
Number of amino acids:16
Molecular Weight:1952.35 Da
Theoretical pI:10.45


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)16.25%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)16.25%
Aspartic Acid ASP (D)00%
Glycine GLY (G)16.25%
Phynylalanine PHE (F)16.25%
Isoleucine ILE (I)16.25%
Histidine HIS (H)00%
Lysine LYS (K)318.75%
Methionine MET (M)16.25%
Leucine LEU (L)16.25%
Asparagine ASN (N)00%
Glutamine GLN (Q)16.25%
Proline PRO (P)16.25%
Serine SER (S)16.25%
Arginine ARG (R)212.5%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)16.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC88
HydrogenH146
NitrogenN26
OxygenO22
SulphurS1

FormulaC88H146N26O22S1
Total Number of Atoms:283


Total number of positively charged residues (ARG + LYS):5
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)    0.763
Aromaticity:0.125

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 53.54

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.00, 18.75, 25.00]

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:55
Grand average of hydropathicity (GRAVY):-1.06