Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5962
Number of amino acids:286
Molecular Weight:32963.37 Da
Theoretical pI:7.8


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)113.85%
Cysteine CYS (C)62.1%
Glutamic Acid GLU (E)51.75%
Aspartic Acid ASP (D)10.35%
Glycine GLY (G)72.45%
Phynylalanine PHE (F)124.2%
Isoleucine ILE (I)155.24%
Histidine HIS (H)62.1%
Lysine LYS (K)20.7%
Methionine MET (M)31.05%
Leucine LEU (L)279.44%
Asparagine ASN (N)72.45%
Glutamine GLN (Q)9131.82%
Proline PRO (P)4114.34%
Serine SER (S)144.9%
Arginine ARG (R)51.75%
Threonine THR (T)93.15%
Tryptophan TRP (W)10.35%
Valine VAL (V)144.9%
Tyrosine TYR (Y)93.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1475
HydrogenH2278
NitrogenN414
OxygenO429
SulphurS9

FormulaC1475H2278N414O429S9
Total Number of Atoms:4605


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    19285
Absorption 0.1% (=1 g/l)    0.585,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18910
Absorption 0.1% (=1 g/l)    0.574,   assuming all CYS residues are reduced
Aromaticity:0.077

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 112.07

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.27, 24.13, 16.08]

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:75.3147
Grand average of hydropathicity (GRAVY):-0.73