Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5748
Number of amino acids:264
Molecular Weight:28222.99 Da
Theoretical pI:9.45


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)269.85%
Cysteine CYS (C)83.03%
Glutamic Acid GLU (E)51.89%
Aspartic Acid ASP (D)51.89%
Glycine GLY (G)3412.88%
Phynylalanine PHE (F)134.92%
Isoleucine ILE (I)93.41%
Histidine HIS (H)51.89%
Lysine LYS (K)51.89%
Methionine MET (M)62.27%
Leucine LEU (L)145.3%
Asparagine ASN (N)176.44%
Glutamine GLN (Q)93.41%
Proline PRO (P)186.82%
Serine SER (S)228.33%
Arginine ARG (R)155.68%
Threonine THR (T)145.3%
Tryptophan TRP (W)93.41%
Valine VAL (V)217.95%
Tyrosine TYR (Y)93.41%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1260
HydrogenH1901
NitrogenN359
OxygenO356
SulphurS14

FormulaC1260H1901N359O356S14
Total Number of Atoms:3890


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    63410
Absorption 0.1% (=1 g/l)    2.247,   assuming all pairs of CYS residues form cystines

Ext. coefficient    62910
Absorption 0.1% (=1 g/l)    2.229,   assuming all CYS residues are reduced
Aromaticity:0.117

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.11

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.41, 34.47, 19.32]

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:66.8939
Grand average of hydropathicity (GRAVY):-0.08