Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5771
Number of amino acids:269
Molecular Weight:29084.63 Da
Theoretical pI:8.99


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)248.92%
Cysteine CYS (C)103.72%
Glutamic Acid GLU (E)93.35%
Aspartic Acid ASP (D)134.83%
Glycine GLY (G)2910.78%
Phynylalanine PHE (F)72.6%
Isoleucine ILE (I)165.95%
Histidine HIS (H)31.12%
Lysine LYS (K)228.18%
Methionine MET (M)82.97%
Leucine LEU (L)155.58%
Asparagine ASN (N)176.32%
Glutamine GLN (Q)41.49%
Proline PRO (P)217.81%
Serine SER (S)134.83%
Arginine ARG (R)93.35%
Threonine THR (T)103.72%
Tryptophan TRP (W)62.23%
Valine VAL (V)217.81%
Tyrosine TYR (Y)124.46%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1301
HydrogenH2029
NitrogenN351
OxygenO370
SulphurS18

FormulaC1301H2029N351O370S18
Total Number of Atoms:4069


Total number of positively charged residues (ARG + LYS):31
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    51505
Absorption 0.1% (=1 g/l)    1.771,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50880
Absorption 0.1% (=1 g/l)    1.749,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.96

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.62, 29.74, 20.82]

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:76.5056
Grand average of hydropathicity (GRAVY):-0.18