Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4141
Number of amino acids:479
Molecular Weight:53055.89 Da
Theoretical pI:5.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)387.93%
Cysteine CYS (C)91.88%
Glutamic Acid GLU (E)245.01%
Aspartic Acid ASP (D)255.22%
Glycine GLY (G)367.52%
Phynylalanine PHE (F)224.59%
Isoleucine ILE (I)224.59%
Histidine HIS (H)142.92%
Lysine LYS (K)265.43%
Methionine MET (M)61.25%
Leucine LEU (L)4810.02%
Asparagine ASN (N)245.01%
Glutamine GLN (Q)214.38%
Proline PRO (P)214.38%
Serine SER (S)4810.02%
Arginine ARG (R)142.92%
Threonine THR (T)183.76%
Tryptophan TRP (W)102.09%
Valine VAL (V)316.47%
Tyrosine TYR (Y)224.59%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2390
HydrogenH3640
NitrogenN630
OxygenO711
SulphurS15

FormulaC2390H3640N630O711S15
Total Number of Atoms:7386


Total number of positively charged residues (ARG + LYS):40
Total number of negatively charged residues (ASP + GLU):49
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    88280
Absorption 0.1% (=1 g/l)    1.664,   assuming all pairs of CYS residues form cystines

Ext. coefficient    87780
Absorption 0.1% (=1 g/l)    1.654,   assuming all CYS residues are reduced
Aromaticity:0.113

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.12

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.36, 26.93, 24.22]

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:83.6953
Grand average of hydropathicity (GRAVY):-0.21