Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5565
Number of amino acids:316
Molecular Weight:35046.1 Da
Theoretical pI:4.4


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)196.01%
Cysteine CYS (C)196.01%
Glutamic Acid GLU (E)185.7%
Aspartic Acid ASP (D)216.65%
Glycine GLY (G)319.81%
Phynylalanine PHE (F)154.75%
Isoleucine ILE (I)72.22%
Histidine HIS (H)20.63%
Lysine LYS (K)92.85%
Methionine MET (M)92.85%
Leucine LEU (L)278.54%
Asparagine ASN (N)206.33%
Glutamine GLN (Q)123.8%
Proline PRO (P)165.06%
Serine SER (S)216.65%
Arginine ARG (R)123.8%
Threonine THR (T)226.96%
Tryptophan TRP (W)61.9%
Valine VAL (V)123.8%
Tyrosine TYR (Y)185.7%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1531
HydrogenH2289
NitrogenN403
OxygenO488
SulphurS28

FormulaC1531H2289N403O488S28
Total Number of Atoms:4739


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):39
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    60945
Absorption 0.1% (=1 g/l)    1.739,   assuming all pairs of CYS residues form cystines

Ext. coefficient    59820
Absorption 0.1% (=1 g/l)    1.707,   assuming all CYS residues are reduced
Aromaticity:0.123

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.83

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.90, 27.85, 23.10]

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:58.9873
Grand average of hydropathicity (GRAVY):-0.37