Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5229
Number of amino acids:500
Molecular Weight:56808.04 Da
Theoretical pI:9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)377.4%
Cysteine CYS (C)81.6%
Glutamic Acid GLU (E)326.4%
Aspartic Acid ASP (D)102%
Glycine GLY (G)357%
Phynylalanine PHE (F)285.6%
Isoleucine ILE (I)244.8%
Histidine HIS (H)122.4%
Lysine LYS (K)153%
Methionine MET (M)71.4%
Leucine LEU (L)438.6%
Asparagine ASN (N)408%
Glutamine GLN (Q)5310.6%
Proline PRO (P)234.6%
Serine SER (S)295.8%
Arginine ARG (R)357%
Threonine THR (T)163.2%
Tryptophan TRP (W)30.6%
Valine VAL (V)326.4%
Tyrosine TYR (Y)183.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2512
HydrogenH3904
NitrogenN740
OxygenO741
SulphurS15

FormulaC2512H3904N740O741S15
Total Number of Atoms:7912


Total number of positively charged residues (ARG + LYS):50
Total number of negatively charged residues (ASP + GLU):42
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    43820
Absorption 0.1% (=1 g/l)    0.771,   assuming all pairs of CYS residues form cystines

Ext. coefficient    43320
Absorption 0.1% (=1 g/l)    0.763,   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 : 46.98

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.60, 25.40, 23.80]

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:78.22
Grand average of hydropathicity (GRAVY):-0.51