Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2079
Number of amino acids:118
Molecular Weight:13092.04 Da
Theoretical pI:8.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)43.39%
Cysteine CYS (C)108.47%
Glutamic Acid GLU (E)43.39%
Aspartic Acid ASP (D)54.24%
Glycine GLY (G)1613.56%
Phynylalanine PHE (F)32.54%
Isoleucine ILE (I)75.93%
Histidine HIS (H)00%
Lysine LYS (K)65.08%
Methionine MET (M)21.69%
Leucine LEU (L)86.78%
Asparagine ASN (N)65.08%
Glutamine GLN (Q)108.47%
Proline PRO (P)97.63%
Serine SER (S)54.24%
Arginine ARG (R)86.78%
Threonine THR (T)43.39%
Tryptophan TRP (W)54.24%
Valine VAL (V)43.39%
Tyrosine TYR (Y)21.69%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC568
HydrogenH887
NitrogenN169
OxygenO164
SulphurS12

FormulaC568H887N169O164S12
Total Number of Atoms:1800


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    31105
Absorption 0.1% (=1 g/l)    2.376,   assuming all pairs of CYS residues form cystines

Ext. coefficient    30480
Absorption 0.1% (=1 g/l)    2.328,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.26

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.58, 30.51, 15.25]

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:62.7966
Grand average of hydropathicity (GRAVY):-0.50