Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5376
Number of amino acids:204
Molecular Weight:21961.25 Da
Theoretical pI:9.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)115.39%
Cysteine CYS (C)10.49%
Glutamic Acid GLU (E)115.39%
Aspartic Acid ASP (D)83.92%
Glycine GLY (G)2713.24%
Phynylalanine PHE (F)125.88%
Isoleucine ILE (I)104.9%
Histidine HIS (H)62.94%
Lysine LYS (K)199.31%
Methionine MET (M)62.94%
Leucine LEU (L)188.82%
Asparagine ASN (N)83.92%
Glutamine GLN (Q)52.45%
Proline PRO (P)52.45%
Serine SER (S)157.35%
Arginine ARG (R)41.96%
Threonine THR (T)157.35%
Tryptophan TRP (W)20.98%
Valine VAL (V)178.33%
Tyrosine TYR (Y)41.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC987
HydrogenH1560
NitrogenN262
OxygenO290
SulphurS7

FormulaC987H1560N262O290S7
Total Number of Atoms:3106


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    16960
Absorption 0.1% (=1 g/l)    0.772,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16960
Absorption 0.1% (=1 g/l)    0.772,   assuming all CYS residues are reduced
Aromaticity:0.088

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 10.99

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.88, 26.96, 22.55]

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:83.0882
Grand average of hydropathicity (GRAVY):-0.10