Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4477
Number of amino acids:676
Molecular Weight:75922.74 Da
Theoretical pI:8.79


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)405.92%
Cysteine CYS (C)152.22%
Glutamic Acid GLU (E)314.59%
Aspartic Acid ASP (D)304.44%
Glycine GLY (G)385.62%
Phynylalanine PHE (F)365.33%
Isoleucine ILE (I)385.62%
Histidine HIS (H)91.33%
Lysine LYS (K)273.99%
Methionine MET (M)131.92%
Leucine LEU (L)7110.5%
Asparagine ASN (N)355.18%
Glutamine GLN (Q)273.99%
Proline PRO (P)294.29%
Serine SER (S)7110.5%
Arginine ARG (R)446.51%
Threonine THR (T)426.21%
Tryptophan TRP (W)50.74%
Valine VAL (V)456.66%
Tyrosine TYR (Y)304.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3390
HydrogenH5316
NitrogenN920
OxygenO1004
SulphurS28

FormulaC3390H5316N920O1004S28
Total Number of Atoms:10658


Total number of positively charged residues (ARG + LYS):71
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    73075
Absorption 0.1% (=1 g/l)    0.962,   assuming all pairs of CYS residues form cystines

Ext. coefficient    72200
Absorption 0.1% (=1 g/l)    0.951,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.19

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.28, 25.59, 22.93]

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:88.1067
Grand average of hydropathicity (GRAVY):-0.13