Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6108
Number of amino acids:109
Molecular Weight:11767.42 Da
Theoretical pI:5.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1513.76%
Cysteine CYS (C)32.75%
Glutamic Acid GLU (E)76.42%
Aspartic Acid ASP (D)43.67%
Glycine GLY (G)54.59%
Phynylalanine PHE (F)43.67%
Isoleucine ILE (I)98.26%
Histidine HIS (H)32.75%
Lysine LYS (K)87.34%
Methionine MET (M)32.75%
Leucine LEU (L)76.42%
Asparagine ASN (N)1311.93%
Glutamine GLN (Q)21.83%
Proline PRO (P)21.83%
Serine SER (S)87.34%
Arginine ARG (R)10.92%
Threonine THR (T)32.75%
Tryptophan TRP (W)10.92%
Valine VAL (V)98.26%
Tyrosine TYR (Y)21.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC516
HydrogenH822
NitrogenN142
OxygenO160
SulphurS6

FormulaC516H822N142O160S6
Total Number of Atoms:1646


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8605
Absorption 0.1% (=1 g/l)    0.731,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.721,   assuming all CYS residues are reduced
Aromaticity:0.064

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.03

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.36, 25.69, 29.36]

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:94.9542
Grand average of hydropathicity (GRAVY):0.03