Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5425
Number of amino acids:245
Molecular Weight:25706.97 Da
Theoretical pI:4.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)239.39%
Cysteine CYS (C)166.53%
Glutamic Acid GLU (E)52.04%
Aspartic Acid ASP (D)124.9%
Glycine GLY (G)239.39%
Phynylalanine PHE (F)135.31%
Isoleucine ILE (I)62.45%
Histidine HIS (H)20.82%
Lysine LYS (K)93.67%
Methionine MET (M)52.04%
Leucine LEU (L)145.71%
Asparagine ASN (N)145.71%
Glutamine GLN (Q)104.08%
Proline PRO (P)218.57%
Serine SER (S)208.16%
Arginine ARG (R)31.22%
Threonine THR (T)239.39%
Tryptophan TRP (W)31.22%
Valine VAL (V)156.12%
Tyrosine TYR (Y)83.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1125
HydrogenH1710
NitrogenN294
OxygenO355
SulphurS21

FormulaC1125H1710N294O355S21
Total Number of Atoms:3505


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29420
Absorption 0.1% (=1 g/l)    1.144,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.106,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.87

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.08, 31.84, 19.18]

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:58.9796
Grand average of hydropathicity (GRAVY):-0.07