Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4292
Number of amino acids:500
Molecular Weight:55298.12 Da
Theoretical pI:5.84


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)265.2%
Cysteine CYS (C)51%
Glutamic Acid GLU (E)295.8%
Aspartic Acid ASP (D)255%
Glycine GLY (G)377.4%
Phynylalanine PHE (F)255%
Isoleucine ILE (I)316.2%
Histidine HIS (H)132.6%
Lysine LYS (K)244.8%
Methionine MET (M)102%
Leucine LEU (L)5711.4%
Asparagine ASN (N)204%
Glutamine GLN (Q)81.6%
Proline PRO (P)214.2%
Serine SER (S)5511%
Arginine ARG (R)214.2%
Threonine THR (T)336.6%
Tryptophan TRP (W)61.2%
Valine VAL (V)367.2%
Tyrosine TYR (Y)183.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2493
HydrogenH3893
NitrogenN647
OxygenO743
SulphurS15

FormulaC2493H3893N647O743S15
Total Number of Atoms:7791


Total number of positively charged residues (ARG + LYS):45
Total number of negatively charged residues (ASP + GLU):54
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    60070
Absorption 0.1% (=1 g/l)    1.086,   assuming all pairs of CYS residues form cystines

Ext. coefficient    59820
Absorption 0.1% (=1 g/l)    1.082,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.63

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.60, 26.60, 24.40]

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:94.72
Grand average of hydropathicity (GRAVY):-0.01