Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5290
Number of amino acids:147
Molecular Weight:15177.27 Da
Theoretical pI:5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1711.56%
Cysteine CYS (C)53.4%
Glutamic Acid GLU (E)128.16%
Aspartic Acid ASP (D)42.72%
Glycine GLY (G)2214.97%
Phynylalanine PHE (F)10.68%
Isoleucine ILE (I)42.72%
Histidine HIS (H)10.68%
Lysine LYS (K)85.44%
Methionine MET (M)42.72%
Leucine LEU (L)138.84%
Asparagine ASN (N)74.76%
Glutamine GLN (Q)64.08%
Proline PRO (P)32.04%
Serine SER (S)74.76%
Arginine ARG (R)42.72%
Threonine THR (T)74.76%
Tryptophan TRP (W)21.36%
Valine VAL (V)1610.88%
Tyrosine TYR (Y)42.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC655
HydrogenH1060
NitrogenN184
OxygenO211
SulphurS9

FormulaC655H1060N184O211S9
Total Number of Atoms:2119


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17210
Absorption 0.1% (=1 g/l)    1.134,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16960
Absorption 0.1% (=1 g/l)    1.117,   assuming all CYS residues are reduced
Aromaticity:0.048

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.02

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.21, 26.53, 31.29]

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:88.2314
Grand average of hydropathicity (GRAVY):0.02