Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2538
Number of amino acids:50
Molecular Weight:5600.52 Da
Theoretical pI:4.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)36%
Cysteine CYS (C)816%
Glutamic Acid GLU (E)12%
Aspartic Acid ASP (D)510%
Glycine GLY (G)48%
Phynylalanine PHE (F)24%
Isoleucine ILE (I)24%
Histidine HIS (H)00%
Lysine LYS (K)510%
Methionine MET (M)12%
Leucine LEU (L)12%
Asparagine ASN (N)12%
Glutamine GLN (Q)24%
Proline PRO (P)48%
Serine SER (S)00%
Arginine ARG (R)12%
Threonine THR (T)36%
Tryptophan TRP (W)12%
Valine VAL (V)24%
Tyrosine TYR (Y)36%


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):6
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    10470
Absorption 0.1% (=1 g/l)    1.869,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    1.780,   assuming all CYS residues are reduced
Aromaticity:0.120

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 15.96

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.00, 18.00, 12.00]

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:41
Grand average of hydropathicity (GRAVY):0.00