Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5236
Number of amino acids:515
Molecular Weight:56712.73 Da
Theoretical pI:8.65


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)275.24%
Cysteine CYS (C)30.58%
Glutamic Acid GLU (E)214.08%
Aspartic Acid ASP (D)265.05%
Glycine GLY (G)305.83%
Phynylalanine PHE (F)234.47%
Isoleucine ILE (I)458.74%
Histidine HIS (H)61.17%
Lysine LYS (K)387.38%
Methionine MET (M)173.3%
Leucine LEU (L)519.9%
Asparagine ASN (N)346.6%
Glutamine GLN (Q)142.72%
Proline PRO (P)152.91%
Serine SER (S)5210.1%
Arginine ARG (R)132.52%
Threonine THR (T)377.18%
Tryptophan TRP (W)50.97%
Valine VAL (V)468.93%
Tyrosine TYR (Y)122.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2547
HydrogenH4101
NitrogenN657
OxygenO759
SulphurS20

FormulaC2547H4101N657O759S20
Total Number of Atoms:8084


Total number of positively charged residues (ARG + LYS):51
Total number of negatively charged residues (ASP + GLU):47
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    45505
Absorption 0.1% (=1 g/l)    0.802,   assuming all pairs of CYS residues form cystines

Ext. coefficient    45380
Absorption 0.1% (=1 g/l)    0.800,   assuming all CYS residues are reduced
Aromaticity:0.078

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.58

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.34, 25.44, 22.52]

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:103.845
Grand average of hydropathicity (GRAVY):0.12