Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2680
Number of amino acids:13
Molecular Weight:1564.88 Da
Theoretical pI:9.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)17.69%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)17.69%
Phynylalanine PHE (F)17.69%
Isoleucine ILE (I)17.69%
Histidine HIS (H)17.69%
Lysine LYS (K)215.38%
Methionine MET (M)17.69%
Leucine LEU (L)17.69%
Asparagine ASN (N)00%
Glutamine GLN (Q)17.69%
Proline PRO (P)00%
Serine SER (S)215.38%
Arginine ARG (R)00%
Threonine THR (T)00%
Tryptophan TRP (W)17.69%
Valine VAL (V)00%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC71
HydrogenH109
NitrogenN19
OxygenO17
SulphurS2

FormulaC71H109N19O17S2
Total Number of Atoms:218


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)    3.515,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    3.515,   assuming all CYS residues are reduced
Aromaticity:0.154

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.96

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.77, 23.08, 15.38]

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:60
Grand average of hydropathicity (GRAVY):-0.15