Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2570
Number of amino acids:50
Molecular Weight:5863.81 Da
Theoretical pI:3.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)48%
Glutamic Acid GLU (E)48%
Aspartic Acid ASP (D)24%
Glycine GLY (G)12%
Phynylalanine PHE (F)510%
Isoleucine ILE (I)24%
Histidine HIS (H)12%
Lysine LYS (K)12%
Methionine MET (M)00%
Leucine LEU (L)918%
Asparagine ASN (N)00%
Glutamine GLN (Q)12%
Proline PRO (P)24%
Serine SER (S)714%
Arginine ARG (R)00%
Threonine THR (T)24%
Tryptophan TRP (W)12%
Valine VAL (V)36%
Tyrosine TYR (Y)48%


Atomic Composition:


As there is at least one ambiguous position (B, J, X or Z) in the sequence considered, the atomic composition cannot be computed.


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11710
Absorption 0.1% (=1 g/l)    1.997,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    1.954,   assuming all CYS residues are reduced
Aromaticity:0.200

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 97.11

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[48.00, 20.00, 26.00]

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:103.2
Grand average of hydropathicity (GRAVY):0.00