Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5172
Number of amino acids:674
Molecular Weight:74500.79 Da
Theoretical pI:7.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)476.97%
Cysteine CYS (C)162.37%
Glutamic Acid GLU (E)284.15%
Aspartic Acid ASP (D)345.04%
Glycine GLY (G)375.49%
Phynylalanine PHE (F)334.9%
Isoleucine ILE (I)365.34%
Histidine HIS (H)81.19%
Lysine LYS (K)304.45%
Methionine MET (M)121.78%
Leucine LEU (L)7010.39%
Asparagine ASN (N)365.34%
Glutamine GLN (Q)274.01%
Proline PRO (P)365.34%
Serine SER (S)7010.39%
Arginine ARG (R)334.9%
Threonine THR (T)507.42%
Tryptophan TRP (W)40.59%
Valine VAL (V)405.93%
Tyrosine TYR (Y)274.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3314
HydrogenH5204
NitrogenN886
OxygenO1009
SulphurS28

FormulaC3314H5204N886O1009S28
Total Number of Atoms:10441


Total number of positively charged residues (ARG + LYS):63
Total number of negatively charged residues (ASP + GLU):62
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    63230
Absorption 0.1% (=1 g/l)    0.849,   assuming all pairs of CYS residues form cystines

Ext. coefficient    62230
Absorption 0.1% (=1 g/l)    0.835,   assuming all CYS residues are reduced
Aromaticity:0.095

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.95

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.16, 26.56, 23.29]

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:85.5195
Grand average of hydropathicity (GRAVY):-0.14