Physicochemical Properties of Peptide



PPepDB ID:PPepDB_718
Number of amino acids:118
Molecular Weight:12748.42 Da
Theoretical pI:5.49


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1210.17%
Cysteine CYS (C)54.24%
Glutamic Acid GLU (E)32.54%
Aspartic Acid ASP (D)75.93%
Glycine GLY (G)1512.71%
Phynylalanine PHE (F)43.39%
Isoleucine ILE (I)86.78%
Histidine HIS (H)21.69%
Lysine LYS (K)00%
Methionine MET (M)32.54%
Leucine LEU (L)75.93%
Asparagine ASN (N)65.08%
Glutamine GLN (Q)43.39%
Proline PRO (P)86.78%
Serine SER (S)54.24%
Arginine ARG (R)86.78%
Threonine THR (T)75.93%
Tryptophan TRP (W)43.39%
Valine VAL (V)65.08%
Tyrosine TYR (Y)43.39%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC562
HydrogenH854
NitrogenN160
OxygenO165
SulphurS8

FormulaC562H854N160O165S8
Total Number of Atoms:1749


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    28210
Absorption 0.1% (=1 g/l)    2.213,   assuming all pairs of CYS residues form cystines

Ext. coefficient    27960
Absorption 0.1% (=1 g/l)    2.193,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.94

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.97, 28.81, 21.19]

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:74.4915
Grand average of hydropathicity (GRAVY):-0.09