Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4447
Number of amino acids:515
Molecular Weight:56707.72 Da
Theoretical pI:5.51


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)417.96%
Cysteine CYS (C)81.55%
Glutamic Acid GLU (E)244.66%
Aspartic Acid ASP (D)346.6%
Glycine GLY (G)377.18%
Phynylalanine PHE (F)265.05%
Isoleucine ILE (I)234.47%
Histidine HIS (H)122.33%
Lysine LYS (K)316.02%
Methionine MET (M)122.33%
Leucine LEU (L)468.93%
Asparagine ASN (N)265.05%
Glutamine GLN (Q)122.33%
Proline PRO (P)214.08%
Serine SER (S)5811.26%
Arginine ARG (R)152.91%
Threonine THR (T)336.41%
Tryptophan TRP (W)112.14%
Valine VAL (V)265.05%
Tyrosine TYR (Y)193.69%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2530
HydrogenH3868
NitrogenN664
OxygenO780
SulphurS20

FormulaC2530H3868N664O780S20
Total Number of Atoms:7862


Total number of positively charged residues (ARG + LYS):46
Total number of negatively charged residues (ASP + GLU):58
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    89310
Absorption 0.1% (=1 g/l)    1.575,   assuming all pairs of CYS residues form cystines

Ext. coefficient    88810
Absorption 0.1% (=1 g/l)    1.566,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.07

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.32, 27.57, 23.88]

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:74.8544
Grand average of hydropathicity (GRAVY):-0.27