Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5029
Number of amino acids:268
Molecular Weight:28733.29 Da
Theoretical pI:8.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)197.09%
Cysteine CYS (C)176.34%
Glutamic Acid GLU (E)82.99%
Aspartic Acid ASP (D)62.24%
Glycine GLY (G)3713.81%
Phynylalanine PHE (F)165.97%
Isoleucine ILE (I)114.1%
Histidine HIS (H)31.12%
Lysine LYS (K)41.49%
Methionine MET (M)41.49%
Leucine LEU (L)186.72%
Asparagine ASN (N)248.96%
Glutamine GLN (Q)103.73%
Proline PRO (P)155.6%
Serine SER (S)207.46%
Arginine ARG (R)145.22%
Threonine THR (T)155.6%
Tryptophan TRP (W)31.12%
Valine VAL (V)114.1%
Tyrosine TYR (Y)134.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1256
HydrogenH1895
NitrogenN357
OxygenO379
SulphurS21

FormulaC1256H1895N357O379S21
Total Number of Atoms:3908


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    36870
Absorption 0.1% (=1 g/l)    1.283,   assuming all pairs of CYS residues form cystines

Ext. coefficient    35870
Absorption 0.1% (=1 g/l)    1.248,   assuming all CYS residues are reduced
Aromaticity:0.119

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.85

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.87, 35.82, 18.28]

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:61.1941
Grand average of hydropathicity (GRAVY):-0.18