Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5784
Number of amino acids:291
Molecular Weight:33660.85 Da
Theoretical pI:6.8


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)124.12%
Cysteine CYS (C)62.06%
Glutamic Acid GLU (E)62.06%
Aspartic Acid ASP (D)10.34%
Glycine GLY (G)72.41%
Phynylalanine PHE (F)134.47%
Isoleucine ILE (I)155.15%
Histidine HIS (H)93.09%
Lysine LYS (K)10.34%
Methionine MET (M)20.69%
Leucine LEU (L)237.9%
Asparagine ASN (N)72.41%
Glutamine GLN (Q)9632.99%
Proline PRO (P)4214.43%
Serine SER (S)134.47%
Arginine ARG (R)51.72%
Threonine THR (T)93.09%
Tryptophan TRP (W)10.34%
Valine VAL (V)144.81%
Tyrosine TYR (Y)93.09%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1502
HydrogenH2297
NitrogenN429
OxygenO440
SulphurS8

FormulaC1502H2297N429O440S8
Total Number of Atoms:4676


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):7
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)    0.573,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18910
Absorption 0.1% (=1 g/l)    0.562,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 109.30

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.77, 23.71, 14.78]

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:69.0034
Grand average of hydropathicity (GRAVY):-0.86