Physicochemical Properties of Peptide



PPepDB ID:PPepDB_646
Number of amino acids:17
Molecular Weight:1853.13 Da
Theoretical pI:9.51


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)15.88%
Cysteine CYS (C)15.88%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)211.76%
Phynylalanine PHE (F)15.88%
Isoleucine ILE (I)15.88%
Histidine HIS (H)00%
Lysine LYS (K)15.88%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)15.88%
Glutamine GLN (Q)00%
Proline PRO (P)15.88%
Serine SER (S)00%
Arginine ARG (R)15.88%
Threonine THR (T)529.41%
Tryptophan TRP (W)15.88%
Valine VAL (V)15.88%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC82
HydrogenH129
NitrogenN23
OxygenO24
SulphurS1

FormulaC82H129N23O24S1
Total Number of Atoms:259


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    2.968,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    2.968,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 48.19

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.53, 23.53, 5.88]

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:45.8823
Grand average of hydropathicity (GRAVY):-0.17