Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4859
Number of amino acids:478
Molecular Weight:52670.35 Da
Theoretical pI:5.25


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)336.9%
Cysteine CYS (C)81.67%
Glutamic Acid GLU (E)336.9%
Aspartic Acid ASP (D)285.86%
Glycine GLY (G)408.37%
Phynylalanine PHE (F)173.56%
Isoleucine ILE (I)204.18%
Histidine HIS (H)142.93%
Lysine LYS (K)285.86%
Methionine MET (M)112.3%
Leucine LEU (L)449.21%
Asparagine ASN (N)275.65%
Glutamine GLN (Q)122.51%
Proline PRO (P)245.02%
Serine SER (S)418.58%
Arginine ARG (R)153.14%
Threonine THR (T)204.18%
Tryptophan TRP (W)71.46%
Valine VAL (V)367.53%
Tyrosine TYR (Y)204.18%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2342
HydrogenH3613
NitrogenN625
OxygenO721
SulphurS19

FormulaC2342H3613N625O721S19
Total Number of Atoms:7320


Total number of positively charged residues (ARG + LYS):43
Total number of negatively charged residues (ASP + GLU):61
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    68800
Absorption 0.1% (=1 g/l)    1.306,   assuming all pairs of CYS residues form cystines

Ext. coefficient    68300
Absorption 0.1% (=1 g/l)    1.297,   assuming all CYS residues are reduced
Aromaticity:0.092

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.93

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.13, 27.62, 25.31]

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:80.9623
Grand average of hydropathicity (GRAVY):-0.31