Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4226
Number of amino acids:766
Molecular Weight:84164.63 Da
Theoretical pI:5.45


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)536.92%
Cysteine CYS (C)70.91%
Glutamic Acid GLU (E)293.79%
Aspartic Acid ASP (D)466.01%
Glycine GLY (G)435.61%
Phynylalanine PHE (F)506.53%
Isoleucine ILE (I)395.09%
Histidine HIS (H)60.78%
Lysine LYS (K)374.83%
Methionine MET (M)111.44%
Leucine LEU (L)7810.18%
Asparagine ASN (N)344.44%
Glutamine GLN (Q)303.92%
Proline PRO (P)455.87%
Serine SER (S)8511.1%
Arginine ARG (R)293.79%
Threonine THR (T)577.44%
Tryptophan TRP (W)70.91%
Valine VAL (V)567.31%
Tyrosine TYR (Y)243.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3801
HydrogenH5907
NitrogenN973
OxygenO1147
SulphurS18

FormulaC3801H5907N973O1147S18
Total Number of Atoms:11846


Total number of positively charged residues (ARG + LYS):66
Total number of negatively charged residues (ASP + GLU):75
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    74635
Absorption 0.1% (=1 g/l)    0.887,   assuming all pairs of CYS residues form cystines

Ext. coefficient    74260
Absorption 0.1% (=1 g/l)    0.882,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.96

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.16, 27.02, 22.32]

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:87.6894
Grand average of hydropathicity (GRAVY):-0.04