Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6030
Number of amino acids:131
Molecular Weight:14402.21 Da
Theoretical pI:9.78


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)75.34%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)75.34%
Aspartic Acid ASP (D)53.82%
Glycine GLY (G)139.92%
Phynylalanine PHE (F)64.58%
Isoleucine ILE (I)43.05%
Histidine HIS (H)53.82%
Lysine LYS (K)1410.69%
Methionine MET (M)53.82%
Leucine LEU (L)86.11%
Asparagine ASN (N)86.11%
Glutamine GLN (Q)86.11%
Proline PRO (P)32.29%
Serine SER (S)129.16%
Arginine ARG (R)53.82%
Threonine THR (T)129.16%
Tryptophan TRP (W)00%
Valine VAL (V)75.34%
Tyrosine TYR (Y)21.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC621
HydrogenH1002
NitrogenN186
OxygenO198
SulphurS5

FormulaC621H1002N186O198S5
Total Number of Atoms:2012


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):12
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)    0.207
Aromaticity:0.061

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.80

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.61, 27.48, 20.61]

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:56.5649
Grand average of hydropathicity (GRAVY):-0.80