Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1233
Number of amino acids:226
Molecular Weight:24564.75 Da
Theoretical pI:8.47


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)135.75%
Cysteine CYS (C)167.08%
Glutamic Acid GLU (E)31.33%
Aspartic Acid ASP (D)83.54%
Glycine GLY (G)2711.95%
Phynylalanine PHE (F)156.64%
Isoleucine ILE (I)93.98%
Histidine HIS (H)20.88%
Lysine LYS (K)41.77%
Methionine MET (M)31.33%
Leucine LEU (L)114.87%
Asparagine ASN (N)177.52%
Glutamine GLN (Q)93.98%
Proline PRO (P)198.41%
Serine SER (S)125.31%
Arginine ARG (R)125.31%
Threonine THR (T)229.73%
Tryptophan TRP (W)52.21%
Valine VAL (V)104.42%
Tyrosine TYR (Y)93.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1084
HydrogenH1619
NitrogenN301
OxygenO318
SulphurS19

FormulaC1084H1619N301O318S19
Total Number of Atoms:3341


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    41910
Absorption 0.1% (=1 g/l)    1.706,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40910
Absorption 0.1% (=1 g/l)    1.665,   assuming all CYS residues are reduced
Aromaticity:0.128

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.29

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.11, 33.19, 13.27]

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:53.0974
Grand average of hydropathicity (GRAVY):-0.23