Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6092
Number of amino acids:209
Molecular Weight:22651.46 Da
Theoretical pI:8.34


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)125.74%
Cysteine CYS (C)41.91%
Glutamic Acid GLU (E)94.31%
Aspartic Acid ASP (D)52.39%
Glycine GLY (G)199.09%
Phynylalanine PHE (F)146.7%
Isoleucine ILE (I)136.22%
Histidine HIS (H)20.96%
Lysine LYS (K)115.26%
Methionine MET (M)73.35%
Leucine LEU (L)2311%
Asparagine ASN (N)73.35%
Glutamine GLN (Q)94.31%
Proline PRO (P)188.61%
Serine SER (S)209.57%
Arginine ARG (R)52.39%
Threonine THR (T)104.78%
Tryptophan TRP (W)20.96%
Valine VAL (V)146.7%
Tyrosine TYR (Y)52.39%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1036
HydrogenH1619
NitrogenN257
OxygenO289
SulphurS11

FormulaC1036H1619N257O289S11
Total Number of Atoms:3212


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    18700
Absorption 0.1% (=1 g/l)    0.826,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18450
Absorption 0.1% (=1 g/l)    0.815,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.74

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.97, 30.62, 24.40]

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:92.3446
Grand average of hydropathicity (GRAVY):0.21