Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5380
Number of amino acids:103
Molecular Weight:11164.2 Da
Theoretical pI:8.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)98.74%
Cysteine CYS (C)43.88%
Glutamic Acid GLU (E)54.85%
Aspartic Acid ASP (D)43.88%
Glycine GLY (G)87.77%
Phynylalanine PHE (F)32.91%
Isoleucine ILE (I)21.94%
Histidine HIS (H)21.94%
Lysine LYS (K)32.91%
Methionine MET (M)54.85%
Leucine LEU (L)1413.59%
Asparagine ASN (N)43.88%
Glutamine GLN (Q)10.97%
Proline PRO (P)54.85%
Serine SER (S)76.8%
Arginine ARG (R)98.74%
Threonine THR (T)43.88%
Tryptophan TRP (W)10.97%
Valine VAL (V)1312.62%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC487
HydrogenH809
NitrogenN143
OxygenO138
SulphurS9

FormulaC487H809N143O138S9
Total Number of Atoms:1586


Total number of positively charged residues (ARG + LYS):12
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    5750
Absorption 0.1% (=1 g/l)    0.515,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    0.493,   assuming all CYS residues are reduced
Aromaticity:0.039

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.35

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.04, 23.30, 32.04]

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:105.922
Grand average of hydropathicity (GRAVY):0.32