Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5174
Number of amino acids:433
Molecular Weight:49558.31 Da
Theoretical pI:6.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)225.08%
Cysteine CYS (C)51.15%
Glutamic Acid GLU (E)235.31%
Aspartic Acid ASP (D)296.7%
Glycine GLY (G)347.85%
Phynylalanine PHE (F)296.7%
Isoleucine ILE (I)235.31%
Histidine HIS (H)122.77%
Lysine LYS (K)255.77%
Methionine MET (M)102.31%
Leucine LEU (L)409.24%
Asparagine ASN (N)235.31%
Glutamine GLN (Q)122.77%
Proline PRO (P)163.7%
Serine SER (S)327.39%
Arginine ARG (R)245.54%
Threonine THR (T)204.62%
Tryptophan TRP (W)133%
Valine VAL (V)276.24%
Tyrosine TYR (Y)143.23%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2247
HydrogenH3406
NitrogenN602
OxygenO639
SulphurS15

FormulaC2247H3406N602O639S15
Total Number of Atoms:6909


Total number of positively charged residues (ARG + LYS):49
Total number of negatively charged residues (ASP + GLU):52
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    92610
Absorption 0.1% (=1 g/l)    1.869,   assuming all pairs of CYS residues form cystines

Ext. coefficient    92360
Absorption 0.1% (=1 g/l)    1.864,   assuming all CYS residues are reduced
Aromaticity:0.129

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.22

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.72, 24.25, 21.94]

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:79.9077
Grand average of hydropathicity (GRAVY):-0.31