Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5393
Number of amino acids:168
Molecular Weight:18573.5 Da
Theoretical pI:4.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)169.52%
Cysteine CYS (C)74.17%
Glutamic Acid GLU (E)63.57%
Aspartic Acid ASP (D)116.55%
Glycine GLY (G)137.74%
Phynylalanine PHE (F)52.98%
Isoleucine ILE (I)10.6%
Histidine HIS (H)63.57%
Lysine LYS (K)21.19%
Methionine MET (M)31.79%
Leucine LEU (L)137.74%
Asparagine ASN (N)116.55%
Glutamine GLN (Q)137.74%
Proline PRO (P)52.98%
Serine SER (S)137.74%
Arginine ARG (R)63.57%
Threonine THR (T)63.57%
Tryptophan TRP (W)31.79%
Valine VAL (V)1710.12%
Tyrosine TYR (Y)116.55%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC811
HydrogenH1211
NitrogenN227
OxygenO257
SulphurS10

FormulaC811H1211N227O257S10
Total Number of Atoms:2516


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33265
Absorption 0.1% (=1 g/l)    1.791,   assuming all pairs of CYS residues form cystines

Ext. coefficient    32890
Absorption 0.1% (=1 g/l)    1.771,   assuming all CYS residues are reduced
Aromaticity:0.113

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.79

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.76, 25.00, 22.62]

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:71.3689
Grand average of hydropathicity (GRAVY):-0.30