Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5653
Number of amino acids:330
Molecular Weight:37294.86 Da
Theoretical pI:7.72


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)195.76%
Cysteine CYS (C)92.73%
Glutamic Acid GLU (E)236.97%
Aspartic Acid ASP (D)216.36%
Glycine GLY (G)206.06%
Phynylalanine PHE (F)92.73%
Isoleucine ILE (I)175.15%
Histidine HIS (H)133.94%
Lysine LYS (K)236.97%
Methionine MET (M)92.73%
Leucine LEU (L)3610.91%
Asparagine ASN (N)164.85%
Glutamine GLN (Q)72.12%
Proline PRO (P)175.15%
Serine SER (S)216.36%
Arginine ARG (R)226.67%
Threonine THR (T)133.94%
Tryptophan TRP (W)20.61%
Valine VAL (V)236.97%
Tyrosine TYR (Y)103.03%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1641
HydrogenH2628
NitrogenN470
OxygenO486
SulphurS18

FormulaC1641H2628N470O486S18
Total Number of Atoms:5243


Total number of positively charged residues (ARG + LYS):45
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    26400
Absorption 0.1% (=1 g/l)    0.708,   assuming all pairs of CYS residues form cystines

Ext. coefficient    25900
Absorption 0.1% (=1 g/l)    0.694,   assuming all CYS residues are reduced
Aromaticity:0.064

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.80

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.39, 22.42, 26.36]

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:88.6061
Grand average of hydropathicity (GRAVY):-0.40