Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4898
Number of amino acids:469
Molecular Weight:53830.45 Da
Theoretical pI:6.19


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)234.9%
Cysteine CYS (C)183.84%
Glutamic Acid GLU (E)306.4%
Aspartic Acid ASP (D)326.82%
Glycine GLY (G)255.33%
Phynylalanine PHE (F)173.62%
Isoleucine ILE (I)183.84%
Histidine HIS (H)61.28%
Lysine LYS (K)326.82%
Methionine MET (M)112.35%
Leucine LEU (L)4710.02%
Asparagine ASN (N)214.48%
Glutamine GLN (Q)245.12%
Proline PRO (P)245.12%
Serine SER (S)326.82%
Arginine ARG (R)275.76%
Threonine THR (T)234.9%
Tryptophan TRP (W)122.56%
Valine VAL (V)306.4%
Tyrosine TYR (Y)173.62%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2386
HydrogenH3719
NitrogenN651
OxygenO711
SulphurS29

FormulaC2386H3719N651O711S29
Total Number of Atoms:7496


Total number of positively charged residues (ARG + LYS):59
Total number of negatively charged residues (ASP + GLU):62
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    92455
Absorption 0.1% (=1 g/l)    1.718,   assuming all pairs of CYS residues form cystines

Ext. coefficient    91330
Absorption 0.1% (=1 g/l)    1.697,   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 : 51.42

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.06, 21.75, 23.67]

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:77.5052
Grand average of hydropathicity (GRAVY):-0.47