Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4812
Number of amino acids:344
Molecular Weight:38162.02 Da
Theoretical pI:5.19


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)185.23%
Cysteine CYS (C)30.87%
Glutamic Acid GLU (E)195.52%
Aspartic Acid ASP (D)226.4%
Glycine GLY (G)288.14%
Phynylalanine PHE (F)205.81%
Isoleucine ILE (I)185.23%
Histidine HIS (H)102.91%
Lysine LYS (K)205.81%
Methionine MET (M)41.16%
Leucine LEU (L)329.3%
Asparagine ASN (N)144.07%
Glutamine GLN (Q)113.2%
Proline PRO (P)174.94%
Serine SER (S)329.3%
Arginine ARG (R)82.33%
Threonine THR (T)205.81%
Tryptophan TRP (W)41.16%
Valine VAL (V)277.85%
Tyrosine TYR (Y)174.94%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1734
HydrogenH2633
NitrogenN437
OxygenO521
SulphurS7

FormulaC1734H2633N437O521S7
Total Number of Atoms:5332


Total number of positively charged residues (ARG + LYS):28
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    47455
Absorption 0.1% (=1 g/l)    1.244,   assuming all pairs of CYS residues form cystines

Ext. coefficient    47330
Absorption 0.1% (=1 g/l)    1.240,   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 : 36.75

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.30, 26.45, 21.22]

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:84.6803
Grand average of hydropathicity (GRAVY):-0.18