Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4018
Number of amino acids:461
Molecular Weight:51752.34 Da
Theoretical pI:5.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)204.34%
Cysteine CYS (C)51.08%
Glutamic Acid GLU (E)296.29%
Aspartic Acid ASP (D)316.72%
Glycine GLY (G)367.81%
Phynylalanine PHE (F)194.12%
Isoleucine ILE (I)255.42%
Histidine HIS (H)81.74%
Lysine LYS (K)418.89%
Methionine MET (M)102.17%
Leucine LEU (L)5010.85%
Asparagine ASN (N)224.77%
Glutamine GLN (Q)132.82%
Proline PRO (P)194.12%
Serine SER (S)357.59%
Arginine ARG (R)112.39%
Threonine THR (T)224.77%
Tryptophan TRP (W)132.82%
Valine VAL (V)388.24%
Tyrosine TYR (Y)143.04%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2347
HydrogenH3655
NitrogenN599
OxygenO688
SulphurS15

FormulaC2347H3655N599O688S15
Total Number of Atoms:7304


Total number of positively charged residues (ARG + LYS):52
Total number of negatively charged residues (ASP + GLU):60
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)    1.789,   assuming all pairs of CYS residues form cystines

Ext. coefficient    92360
Absorption 0.1% (=1 g/l)    1.785,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.49

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.49, 24.30, 23.64]

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:91.692
Grand average of hydropathicity (GRAVY):-0.22