Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4568
Number of amino acids:665
Molecular Weight:74887.24 Da
Theoretical pI:5.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)385.71%
Cysteine CYS (C)162.41%
Glutamic Acid GLU (E)375.56%
Aspartic Acid ASP (D)406.02%
Glycine GLY (G)406.02%
Phynylalanine PHE (F)446.62%
Isoleucine ILE (I)406.02%
Histidine HIS (H)91.35%
Lysine LYS (K)334.96%
Methionine MET (M)162.41%
Leucine LEU (L)629.32%
Asparagine ASN (N)375.56%
Glutamine GLN (Q)253.76%
Proline PRO (P)263.91%
Serine SER (S)669.92%
Arginine ARG (R)385.71%
Threonine THR (T)304.51%
Tryptophan TRP (W)60.9%
Valine VAL (V)416.17%
Tyrosine TYR (Y)213.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3336
HydrogenH5190
NitrogenN898
OxygenO999
SulphurS32

FormulaC3336H5190N898O999S32
Total Number of Atoms:10455


Total number of positively charged residues (ARG + LYS):71
Total number of negatively charged residues (ASP + GLU):77
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    65290
Absorption 0.1% (=1 g/l)    0.872,   assuming all pairs of CYS residues form cystines

Ext. coefficient    64290
Absorption 0.1% (=1 g/l)    0.858,   assuming all CYS residues are reduced
Aromaticity:0.107

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.00

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.18, 25.41, 23.01]

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:83.4135
Grand average of hydropathicity (GRAVY):-0.19