Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5171
Number of amino acids:240
Molecular Weight:25789.27 Da
Theoretical pI:5.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)229.17%
Cysteine CYS (C)104.17%
Glutamic Acid GLU (E)20.83%
Aspartic Acid ASP (D)104.17%
Glycine GLY (G)3414.17%
Phynylalanine PHE (F)114.58%
Isoleucine ILE (I)156.25%
Histidine HIS (H)10.42%
Lysine LYS (K)52.08%
Methionine MET (M)62.5%
Leucine LEU (L)177.08%
Asparagine ASN (N)145.83%
Glutamine GLN (Q)125%
Proline PRO (P)83.33%
Serine SER (S)156.25%
Arginine ARG (R)62.5%
Threonine THR (T)166.67%
Tryptophan TRP (W)93.75%
Valine VAL (V)135.42%
Tyrosine TYR (Y)145.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1162
HydrogenH1728
NitrogenN300
OxygenO336
SulphurS16

FormulaC1162H1728N300O336S16
Total Number of Atoms:3542


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    70985
Absorption 0.1% (=1 g/l)    2.752,   assuming all pairs of CYS residues form cystines

Ext. coefficient    70360
Absorption 0.1% (=1 g/l)    2.728,   assuming all CYS residues are reduced
Aromaticity:0.142

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.00

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.92, 29.58, 19.58]

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:76.875
Grand average of hydropathicity (GRAVY):0.14