Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4981
Number of amino acids:375
Molecular Weight:41314.77 Da
Theoretical pI:5.39


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3910.4%
Cysteine CYS (C)10.27%
Glutamic Acid GLU (E)236.13%
Aspartic Acid ASP (D)205.33%
Glycine GLY (G)225.87%
Phynylalanine PHE (F)184.8%
Isoleucine ILE (I)174.53%
Histidine HIS (H)61.6%
Lysine LYS (K)256.67%
Methionine MET (M)112.93%
Leucine LEU (L)379.87%
Asparagine ASN (N)205.33%
Glutamine GLN (Q)143.73%
Proline PRO (P)154%
Serine SER (S)266.93%
Arginine ARG (R)102.67%
Threonine THR (T)359.33%
Tryptophan TRP (W)20.53%
Valine VAL (V)184.8%
Tyrosine TYR (Y)164.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1845
HydrogenH2884
NitrogenN478
OxygenO573
SulphurS12

FormulaC1845H2884N478O573S12
Total Number of Atoms:5792


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):43
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34840
Absorption 0.1% (=1 g/l)    0.843,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34840
Absorption 0.1% (=1 g/l)    0.843,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.09

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.80, 22.13, 29.33]

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:80.48
Grand average of hydropathicity (GRAVY):-0.25