Physicochemical Properties of Peptide



PPepDB ID:PPepDB_733
Number of amino acids:153
Molecular Weight:16178.94 Da
Theoretical pI:5.49


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)127.84%
Cysteine CYS (C)138.5%
Glutamic Acid GLU (E)106.54%
Aspartic Acid ASP (D)53.27%
Glycine GLY (G)1610.46%
Phynylalanine PHE (F)63.92%
Isoleucine ILE (I)53.27%
Histidine HIS (H)00%
Lysine LYS (K)95.88%
Methionine MET (M)42.61%
Leucine LEU (L)1711.11%
Asparagine ASN (N)63.92%
Glutamine GLN (Q)31.96%
Proline PRO (P)106.54%
Serine SER (S)53.27%
Arginine ARG (R)53.27%
Threonine THR (T)159.8%
Tryptophan TRP (W)21.31%
Valine VAL (V)106.54%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC703
HydrogenH1140
NitrogenN188
OxygenO213
SulphurS17

FormulaC703H1140N188O213S17
Total Number of Atoms:2261


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11750
Absorption 0.1% (=1 g/l)    0.726,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11000
Absorption 0.1% (=1 g/l)    0.680,   assuming all CYS residues are reduced
Aromaticity:0.052

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.38

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.14, 24.18, 28.10]

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:82.8758
Grand average of hydropathicity (GRAVY):0.18