Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1145
Number of amino acids:247
Molecular Weight:26867.23 Da
Theoretical pI:7.82


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)156.07%
Cysteine CYS (C)176.88%
Glutamic Acid GLU (E)41.62%
Aspartic Acid ASP (D)145.67%
Glycine GLY (G)2610.53%
Phynylalanine PHE (F)187.29%
Isoleucine ILE (I)124.86%
Histidine HIS (H)20.81%
Lysine LYS (K)83.24%
Methionine MET (M)52.02%
Leucine LEU (L)124.86%
Asparagine ASN (N)176.88%
Glutamine GLN (Q)93.64%
Proline PRO (P)176.88%
Serine SER (S)228.91%
Arginine ARG (R)124.86%
Threonine THR (T)187.29%
Tryptophan TRP (W)41.62%
Valine VAL (V)72.83%
Tyrosine TYR (Y)83.24%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1174
HydrogenH1767
NitrogenN325
OxygenO358
SulphurS22

FormulaC1174H1767N325O358S22
Total Number of Atoms:3646


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34920
Absorption 0.1% (=1 g/l)    1.300,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33920
Absorption 0.1% (=1 g/l)    1.262,   assuming all CYS residues are reduced
Aromaticity:0.121

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.34

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.70, 33.20, 14.57]

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:52.1862
Grand average of hydropathicity (GRAVY):-0.28