Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5513
Number of amino acids:319
Molecular Weight:35264.08 Da
Theoretical pI:6.05


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)278.46%
Cysteine CYS (C)144.39%
Glutamic Acid GLU (E)237.21%
Aspartic Acid ASP (D)154.7%
Glycine GLY (G)226.9%
Phynylalanine PHE (F)144.39%
Isoleucine ILE (I)185.64%
Histidine HIS (H)165.02%
Lysine LYS (K)185.64%
Methionine MET (M)30.94%
Leucine LEU (L)3210.03%
Asparagine ASN (N)113.45%
Glutamine GLN (Q)103.13%
Proline PRO (P)92.82%
Serine SER (S)268.15%
Arginine ARG (R)123.76%
Threonine THR (T)175.33%
Tryptophan TRP (W)20.63%
Valine VAL (V)195.96%
Tyrosine TYR (Y)113.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1560
HydrogenH2432
NitrogenN428
OxygenO471
SulphurS17

FormulaC1560H2432N428O471S17
Total Number of Atoms:4908


Total number of positively charged residues (ARG + LYS):30
Total number of negatively charged residues (ASP + GLU):38
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    28265
Absorption 0.1% (=1 g/l)    0.802,   assuming all pairs of CYS residues form cystines

Ext. coefficient    27390
Absorption 0.1% (=1 g/l)    0.777,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.84

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.09, 21.32, 26.65]

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:86.865
Grand average of hydropathicity (GRAVY):-0.14