Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5350
Number of amino acids:499
Molecular Weight:56306.15 Da
Theoretical pI:8.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)326.41%
Cysteine CYS (C)102%
Glutamic Acid GLU (E)265.21%
Aspartic Acid ASP (D)163.21%
Glycine GLY (G)377.41%
Phynylalanine PHE (F)244.81%
Isoleucine ILE (I)244.81%
Histidine HIS (H)102%
Lysine LYS (K)122.4%
Methionine MET (M)51%
Leucine LEU (L)387.62%
Asparagine ASN (N)346.81%
Glutamine GLN (Q)5210.42%
Proline PRO (P)224.41%
Serine SER (S)387.62%
Arginine ARG (R)387.62%
Threonine THR (T)214.21%
Tryptophan TRP (W)40.8%
Valine VAL (V)377.41%
Tyrosine TYR (Y)193.81%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2471
HydrogenH3853
NitrogenN735
OxygenO748
SulphurS15

FormulaC2471H3853N735O748S15
Total Number of Atoms:7822


Total number of positively charged residues (ARG + LYS):50
Total number of negatively charged residues (ASP + GLU):42
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    50935
Absorption 0.1% (=1 g/l)    0.905,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50310
Absorption 0.1% (=1 g/l)    0.894,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.01

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.26, 26.25, 20.24]

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:76.3728
Grand average of hydropathicity (GRAVY):-0.51