Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4385
Number of amino acids:659
Molecular Weight:73924.98 Da
Theoretical pI:8.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)426.37%
Cysteine CYS (C)142.12%
Glutamic Acid GLU (E)274.1%
Aspartic Acid ASP (D)365.46%
Glycine GLY (G)345.16%
Phynylalanine PHE (F)385.77%
Isoleucine ILE (I)416.22%
Histidine HIS (H)81.21%
Lysine LYS (K)263.95%
Methionine MET (M)142.12%
Leucine LEU (L)578.65%
Asparagine ASN (N)446.68%
Glutamine GLN (Q)274.1%
Proline PRO (P)314.7%
Serine SER (S)609.1%
Arginine ARG (R)416.22%
Threonine THR (T)487.28%
Tryptophan TRP (W)40.61%
Valine VAL (V)426.37%
Tyrosine TYR (Y)253.79%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3282
HydrogenH5135
NitrogenN899
OxygenO990
SulphurS28

FormulaC3282H5135N899O990S28
Total Number of Atoms:10334


Total number of positively charged residues (ARG + LYS):67
Total number of negatively charged residues (ASP + GLU):63
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    60125
Absorption 0.1% (=1 g/l)    0.813,   assuming all pairs of CYS residues form cystines

Ext. coefficient    59250
Absorption 0.1% (=1 g/l)    0.801,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.80

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.41, 25.64, 21.24]

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:82.8528
Grand average of hydropathicity (GRAVY):-0.21