Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6014
Number of amino acids:325
Molecular Weight:35624.39 Da
Theoretical pI:9.35


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)268%
Cysteine CYS (C)82.46%
Glutamic Acid GLU (E)82.46%
Aspartic Acid ASP (D)237.08%
Glycine GLY (G)206.15%
Phynylalanine PHE (F)144.31%
Isoleucine ILE (I)144.31%
Histidine HIS (H)41.23%
Lysine LYS (K)278.31%
Methionine MET (M)51.54%
Leucine LEU (L)3811.69%
Asparagine ASN (N)175.23%
Glutamine GLN (Q)72.15%
Proline PRO (P)175.23%
Serine SER (S)247.38%
Arginine ARG (R)175.23%
Threonine THR (T)164.92%
Tryptophan TRP (W)20.62%
Valine VAL (V)309.23%
Tyrosine TYR (Y)82.46%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1593
HydrogenH2573
NitrogenN437
OxygenO460
SulphurS13

FormulaC1593H2573N437O460S13
Total Number of Atoms:5076


Total number of positively charged residues (ARG + LYS):44
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    23420
Absorption 0.1% (=1 g/l)    0.657,   assuming all pairs of CYS residues form cystines

Ext. coefficient    22920
Absorption 0.1% (=1 g/l)    0.643,   assuming all CYS residues are reduced
Aromaticity:0.074

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.78

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.62, 24.00, 23.69]

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:97.1692
Grand average of hydropathicity (GRAVY):-0.05