Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5484
Number of amino acids:262
Molecular Weight:27971.18 Da
Theoretical pI:9.19


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3212.21%
Cysteine CYS (C)93.44%
Glutamic Acid GLU (E)20.76%
Aspartic Acid ASP (D)114.2%
Glycine GLY (G)3412.98%
Phynylalanine PHE (F)114.2%
Isoleucine ILE (I)114.2%
Histidine HIS (H)51.91%
Lysine LYS (K)103.82%
Methionine MET (M)103.82%
Leucine LEU (L)155.73%
Asparagine ASN (N)103.82%
Glutamine GLN (Q)103.82%
Proline PRO (P)155.73%
Serine SER (S)124.58%
Arginine ARG (R)124.58%
Threonine THR (T)176.49%
Tryptophan TRP (W)93.44%
Valine VAL (V)186.87%
Tyrosine TYR (Y)93.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1251
HydrogenH1909
NitrogenN347
OxygenO347
SulphurS19

FormulaC1251H1909N347O347S19
Total Number of Atoms:3873


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    63410
Absorption 0.1% (=1 g/l)    2.267,   assuming all pairs of CYS residues form cystines

Ext. coefficient    62910
Absorption 0.1% (=1 g/l)    2.249,   assuming all CYS residues are reduced
Aromaticity:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.81

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.86, 27.10, 22.52]

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:70.8396
Grand average of hydropathicity (GRAVY):0.03