Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4011
Number of amino acids:316
Molecular Weight:35418.59 Da
Theoretical pI:8.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)237.28%
Cysteine CYS (C)41.27%
Glutamic Acid GLU (E)216.65%
Aspartic Acid ASP (D)154.75%
Glycine GLY (G)206.33%
Phynylalanine PHE (F)165.06%
Isoleucine ILE (I)237.28%
Histidine HIS (H)20.63%
Lysine LYS (K)268.23%
Methionine MET (M)41.27%
Leucine LEU (L)288.86%
Asparagine ASN (N)206.33%
Glutamine GLN (Q)92.85%
Proline PRO (P)113.48%
Serine SER (S)206.33%
Arginine ARG (R)144.43%
Threonine THR (T)226.96%
Tryptophan TRP (W)30.95%
Valine VAL (V)226.96%
Tyrosine TYR (Y)134.11%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1596
HydrogenH2522
NitrogenN420
OxygenO473
SulphurS8

FormulaC1596H2522N420O473S8
Total Number of Atoms:5019


Total number of positively charged residues (ARG + LYS):40
Total number of negatively charged residues (ASP + GLU):36
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    36120
Absorption 0.1% (=1 g/l)    1.020,   assuming all pairs of CYS residues form cystines

Ext. coefficient    35870
Absorption 0.1% (=1 g/l)    1.013,   assuming all CYS residues are reduced
Aromaticity:0.101

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 12.68

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.23, 22.47, 24.05]

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:90.4114
Grand average of hydropathicity (GRAVY):-0.22