Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5688
Number of amino acids:320
Molecular Weight:35431.12 Da
Theoretical pI:8.63


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)185.63%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)195.94%
Aspartic Acid ASP (D)134.06%
Glycine GLY (G)268.13%
Phynylalanine PHE (F)165%
Isoleucine ILE (I)3410.63%
Histidine HIS (H)30.94%
Lysine LYS (K)268.13%
Methionine MET (M)61.88%
Leucine LEU (L)257.81%
Asparagine ASN (N)226.88%
Glutamine GLN (Q)154.69%
Proline PRO (P)226.88%
Serine SER (S)185.63%
Arginine ARG (R)92.81%
Threonine THR (T)82.5%
Tryptophan TRP (W)20.63%
Valine VAL (V)268.13%
Tyrosine TYR (Y)103.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1616
HydrogenH2562
NitrogenN418
OxygenO458
SulphurS8

FormulaC1616H2562N418O458S8
Total Number of Atoms:5062


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    26025
Absorption 0.1% (=1 g/l)    0.735,   assuming all pairs of CYS residues form cystines

Ext. coefficient    25900
Absorption 0.1% (=1 g/l)    0.731,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.50

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.31, 27.50, 21.25]

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:101.094
Grand average of hydropathicity (GRAVY):-0.07