Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4619
Number of amino acids:669
Molecular Weight:74006.2 Da
Theoretical pI:8.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)395.83%
Cysteine CYS (C)121.79%
Glutamic Acid GLU (E)375.53%
Aspartic Acid ASP (D)274.04%
Glycine GLY (G)436.43%
Phynylalanine PHE (F)355.23%
Isoleucine ILE (I)314.63%
Histidine HIS (H)121.79%
Lysine LYS (K)263.89%
Methionine MET (M)142.09%
Leucine LEU (L)7911.81%
Asparagine ASN (N)395.83%
Glutamine GLN (Q)284.19%
Proline PRO (P)334.93%
Serine SER (S)7711.51%
Arginine ARG (R)416.13%
Threonine THR (T)375.53%
Tryptophan TRP (W)30.45%
Valine VAL (V)405.98%
Tyrosine TYR (Y)162.39%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3268
HydrogenH5186
NitrogenN912
OxygenO995
SulphurS26

FormulaC3268H5186N912O995S26
Total Number of Atoms:10387


Total number of positively charged residues (ARG + LYS):67
Total number of negatively charged residues (ASP + GLU):64
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    41090
Absorption 0.1% (=1 g/l)    0.555,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40340
Absorption 0.1% (=1 g/l)    0.545,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.46

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.49, 28.70, 25.26]

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:87.2946
Grand average of hydropathicity (GRAVY):-0.20