Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5424
Number of amino acids:259
Molecular Weight:27203.81 Da
Theoretical pI:7.01


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2810.81%
Cysteine CYS (C)103.86%
Glutamic Acid GLU (E)103.86%
Aspartic Acid ASP (D)83.09%
Glycine GLY (G)3212.36%
Phynylalanine PHE (F)103.86%
Isoleucine ILE (I)145.41%
Histidine HIS (H)31.16%
Lysine LYS (K)83.09%
Methionine MET (M)62.32%
Leucine LEU (L)135.02%
Asparagine ASN (N)145.41%
Glutamine GLN (Q)72.7%
Proline PRO (P)155.79%
Serine SER (S)249.27%
Arginine ARG (R)103.86%
Threonine THR (T)103.86%
Tryptophan TRP (W)31.16%
Valine VAL (V)218.11%
Tyrosine TYR (Y)135.02%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1201
HydrogenH1847
NitrogenN327
OxygenO364
SulphurS16

FormulaC1201H1847N327O364S16
Total Number of Atoms:3755


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    36495
Absorption 0.1% (=1 g/l)    1.342,   assuming all pairs of CYS residues form cystines

Ext. coefficient    35870
Absorption 0.1% (=1 g/l)    1.319,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.82

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.57, 32.82, 22.01]

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:74.9807
Grand average of hydropathicity (GRAVY):0.04