Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4727
Number of amino acids:476
Molecular Weight:52625.12 Da
Theoretical pI:6.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)5110.71%
Cysteine CYS (C)71.47%
Glutamic Acid GLU (E)183.78%
Aspartic Acid ASP (D)265.46%
Glycine GLY (G)387.98%
Phynylalanine PHE (F)163.36%
Isoleucine ILE (I)153.15%
Histidine HIS (H)142.94%
Lysine LYS (K)61.26%
Methionine MET (M)81.68%
Leucine LEU (L)439.03%
Asparagine ASN (N)183.78%
Glutamine GLN (Q)122.52%
Proline PRO (P)285.88%
Serine SER (S)367.56%
Arginine ARG (R)326.72%
Threonine THR (T)347.14%
Tryptophan TRP (W)122.52%
Valine VAL (V)336.93%
Tyrosine TYR (Y)296.09%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2362
HydrogenH3566
NitrogenN648
OxygenO694
SulphurS15

FormulaC2362H3566N648O694S15
Total Number of Atoms:7285


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    109585
Absorption 0.1% (=1 g/l)    2.082,   assuming all pairs of CYS residues form cystines

Ext. coefficient    109210
Absorption 0.1% (=1 g/l)    2.075,   assuming all CYS residues are reduced
Aromaticity:0.120

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.88

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.09, 25.21, 25.21]

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:78.3403
Grand average of hydropathicity (GRAVY):-0.20