Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5526
Number of amino acids:255
Molecular Weight:27733.44 Da
Theoretical pI:9.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)228.63%
Cysteine CYS (C)83.14%
Glutamic Acid GLU (E)10.39%
Aspartic Acid ASP (D)83.14%
Glycine GLY (G)3212.55%
Phynylalanine PHE (F)145.49%
Isoleucine ILE (I)145.49%
Histidine HIS (H)31.18%
Lysine LYS (K)103.92%
Methionine MET (M)83.14%
Leucine LEU (L)114.31%
Asparagine ASN (N)197.45%
Glutamine GLN (Q)155.88%
Proline PRO (P)83.14%
Serine SER (S)197.45%
Arginine ARG (R)135.1%
Threonine THR (T)197.45%
Tryptophan TRP (W)83.14%
Valine VAL (V)145.49%
Tyrosine TYR (Y)93.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1226
HydrogenH1870
NitrogenN352
OxygenO355
SulphurS16

FormulaC1226H1870N352O355S16
Total Number of Atoms:3819


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    57910
Absorption 0.1% (=1 g/l)    2.088,   assuming all pairs of CYS residues form cystines

Ext. coefficient    57410
Absorption 0.1% (=1 g/l)    2.070,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.62

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.45, 30.59, 16.47]

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:62.7844
Grand average of hydropathicity (GRAVY):-0.21