Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5441
Number of amino acids:322
Molecular Weight:34345.43 Da
Theoretical pI:6.22


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)226.83%
Cysteine CYS (C)175.28%
Glutamic Acid GLU (E)82.48%
Aspartic Acid ASP (D)154.66%
Glycine GLY (G)4614.29%
Phynylalanine PHE (F)175.28%
Isoleucine ILE (I)154.66%
Histidine HIS (H)51.55%
Lysine LYS (K)61.86%
Methionine MET (M)51.55%
Leucine LEU (L)216.52%
Asparagine ASN (N)206.21%
Glutamine GLN (Q)154.66%
Proline PRO (P)226.83%
Serine SER (S)278.39%
Arginine ARG (R)154.66%
Threonine THR (T)164.97%
Tryptophan TRP (W)72.17%
Valine VAL (V)123.73%
Tyrosine TYR (Y)113.42%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1505
HydrogenH2265
NitrogenN425
OxygenO458
SulphurS22

FormulaC1505H2265N425O458S22
Total Number of Atoms:4675


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    55890
Absorption 0.1% (=1 g/l)    1.627,   assuming all pairs of CYS residues form cystines

Ext. coefficient    54890
Absorption 0.1% (=1 g/l)    1.598,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.94

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.78, 35.71, 17.39]

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:61.2423
Grand average of hydropathicity (GRAVY):-0.25