Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4503
Number of amino acids:687
Molecular Weight:74911.4 Da
Theoretical pI:7.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)324.66%
Cysteine CYS (C)91.31%
Glutamic Acid GLU (E)284.08%
Aspartic Acid ASP (D)405.82%
Glycine GLY (G)568.15%
Phynylalanine PHE (F)273.93%
Isoleucine ILE (I)304.37%
Histidine HIS (H)131.89%
Lysine LYS (K)426.11%
Methionine MET (M)121.75%
Leucine LEU (L)7711.21%
Asparagine ASN (N)497.13%
Glutamine GLN (Q)243.49%
Proline PRO (P)375.39%
Serine SER (S)8412.23%
Arginine ARG (R)273.93%
Threonine THR (T)385.53%
Tryptophan TRP (W)60.87%
Valine VAL (V)385.53%
Tyrosine TYR (Y)182.62%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3295
HydrogenH5213
NitrogenN915
OxygenO1037
SulphurS21

FormulaC3295H5213N915O1037S21
Total Number of Atoms:10481


Total number of positively charged residues (ARG + LYS):69
Total number of negatively charged residues (ASP + GLU):68
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    60320
Absorption 0.1% (=1 g/l)    0.805,   assuming all pairs of CYS residues form cystines

Ext. coefficient    59820
Absorption 0.1% (=1 g/l)    0.799,   assuming all CYS residues are reduced
Aromaticity:0.074

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.97

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.53, 32.90, 21.69]

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:81.4412
Grand average of hydropathicity (GRAVY):-0.38