Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5052
Number of amino acids:673
Molecular Weight:75295.34 Da
Theoretical pI:8.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)426.24%
Cysteine CYS (C)162.38%
Glutamic Acid GLU (E)324.75%
Aspartic Acid ASP (D)294.31%
Glycine GLY (G)405.94%
Phynylalanine PHE (F)284.16%
Isoleucine ILE (I)517.58%
Histidine HIS (H)101.49%
Lysine LYS (K)375.5%
Methionine MET (M)142.08%
Leucine LEU (L)608.92%
Asparagine ASN (N)375.5%
Glutamine GLN (Q)263.86%
Proline PRO (P)375.5%
Serine SER (S)629.21%
Arginine ARG (R)375.5%
Threonine THR (T)436.39%
Tryptophan TRP (W)91.34%
Valine VAL (V)375.5%
Tyrosine TYR (Y)263.86%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3361
HydrogenH5295
NitrogenN913
OxygenO990
SulphurS30

FormulaC3361H5295N913O990S30
Total Number of Atoms:10589


Total number of positively charged residues (ARG + LYS):74
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    89240
Absorption 0.1% (=1 g/l)    1.185,   assuming all pairs of CYS residues form cystines

Ext. coefficient    88240
Absorption 0.1% (=1 g/l)    1.172,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.45

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.35, 26.15, 21.99]

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:86.5082
Grand average of hydropathicity (GRAVY):-0.21