Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5900
Number of amino acids:255
Molecular Weight:29169.59 Da
Theoretical pI:9.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)145.49%
Cysteine CYS (C)145.49%
Glutamic Acid GLU (E)93.53%
Aspartic Acid ASP (D)93.53%
Glycine GLY (G)187.06%
Phynylalanine PHE (F)124.71%
Isoleucine ILE (I)135.1%
Histidine HIS (H)83.14%
Lysine LYS (K)218.24%
Methionine MET (M)51.96%
Leucine LEU (L)249.41%
Asparagine ASN (N)166.27%
Glutamine GLN (Q)103.92%
Proline PRO (P)83.14%
Serine SER (S)197.45%
Arginine ARG (R)124.71%
Threonine THR (T)124.71%
Tryptophan TRP (W)20.78%
Valine VAL (V)103.92%
Tyrosine TYR (Y)197.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1304
HydrogenH2008
NitrogenN356
OxygenO368
SulphurS19

FormulaC1304H2008N356O368S19
Total Number of Atoms:4055


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40185
Absorption 0.1% (=1 g/l)    1.378,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39310
Absorption 0.1% (=1 g/l)    1.348,   assuming all CYS residues are reduced
Aromaticity:0.129

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.05

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.37, 23.92, 20.39]

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:73.451
Grand average of hydropathicity (GRAVY):-0.35