Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5870
Number of amino acids:118
Molecular Weight:12789.09 Da
Theoretical pI:8.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)108.47%
Cysteine CYS (C)97.63%
Glutamic Acid GLU (E)21.69%
Aspartic Acid ASP (D)75.93%
Glycine GLY (G)54.24%
Phynylalanine PHE (F)32.54%
Isoleucine ILE (I)54.24%
Histidine HIS (H)00%
Lysine LYS (K)108.47%
Methionine MET (M)32.54%
Leucine LEU (L)1210.17%
Asparagine ASN (N)75.93%
Glutamine GLN (Q)21.69%
Proline PRO (P)97.63%
Serine SER (S)86.78%
Arginine ARG (R)54.24%
Threonine THR (T)86.78%
Tryptophan TRP (W)21.69%
Valine VAL (V)108.47%
Tyrosine TYR (Y)10.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC559
HydrogenH918
NitrogenN154
OxygenO163
SulphurS12

FormulaC559H918N154O163S12
Total Number of Atoms:1806


Total number of positively charged residues (ARG + LYS):15
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    12990
Absorption 0.1% (=1 g/l)    1.016,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    0.977,   assuming all CYS residues are reduced
Aromaticity:0.051

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.30

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.97, 24.58, 22.88]

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:89.2373
Grand average of hydropathicity (GRAVY):0.07