Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4239
Number of amino acids:247
Molecular Weight:27305.18 Da
Theoretical pI:5.47


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.48%
Cysteine CYS (C)10.4%
Glutamic Acid GLU (E)114.45%
Aspartic Acid ASP (D)62.43%
Glycine GLY (G)197.69%
Phynylalanine PHE (F)176.88%
Isoleucine ILE (I)2811.34%
Histidine HIS (H)52.02%
Lysine LYS (K)93.64%
Methionine MET (M)41.62%
Leucine LEU (L)3212.96%
Asparagine ASN (N)83.24%
Glutamine GLN (Q)93.64%
Proline PRO (P)156.07%
Serine SER (S)156.07%
Arginine ARG (R)31.21%
Threonine THR (T)156.07%
Tryptophan TRP (W)52.02%
Valine VAL (V)208.1%
Tyrosine TYR (Y)93.64%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1296
HydrogenH1995
NitrogenN297
OxygenO338
SulphurS5

FormulaC1296H1995N297O338S5
Total Number of Atoms:3931


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    40910
Absorption 0.1% (=1 g/l)    1.498,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40910
Absorption 0.1% (=1 g/l)    1.498,   assuming all CYS residues are reduced
Aromaticity:0.126

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.13

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[44.94, 23.08, 25.51]

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:124.696
Grand average of hydropathicity (GRAVY):0.67