Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5648
Number of amino acids:126
Molecular Weight:12978.79 Da
Theoretical pI:8.79


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)129.52%
Cysteine CYS (C)43.17%
Glutamic Acid GLU (E)32.38%
Aspartic Acid ASP (D)43.17%
Glycine GLY (G)1915.08%
Phynylalanine PHE (F)75.56%
Isoleucine ILE (I)32.38%
Histidine HIS (H)21.59%
Lysine LYS (K)53.97%
Methionine MET (M)10.79%
Leucine LEU (L)75.56%
Asparagine ASN (N)43.17%
Glutamine GLN (Q)21.59%
Proline PRO (P)53.97%
Serine SER (S)118.73%
Arginine ARG (R)53.97%
Threonine THR (T)86.35%
Tryptophan TRP (W)21.59%
Valine VAL (V)1814.29%
Tyrosine TYR (Y)43.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC581
HydrogenH900
NitrogenN158
OxygenO170
SulphurS5

FormulaC581H900N158O170S5
Total Number of Atoms:1814


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17210
Absorption 0.1% (=1 g/l)    1.326,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16960
Absorption 0.1% (=1 g/l)    1.307,   assuming all CYS residues are reduced
Aromaticity:0.103

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.54, 30.95, 18.25]

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:81.9047
Grand average of hydropathicity (GRAVY):0.30