Physicochemical Properties of Peptide



PPepDB ID:PPepDB_630
Number of amino acids:30
Molecular Weight:3323.1 Da
Theoretical pI:6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)516.67%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)26.67%
Glycine GLY (G)26.67%
Phynylalanine PHE (F)13.33%
Isoleucine ILE (I)13.33%
Histidine HIS (H)00%
Lysine LYS (K)26.67%
Methionine MET (M)00%
Leucine LEU (L)13.33%
Asparagine ASN (N)13.33%
Glutamine GLN (Q)26.67%
Proline PRO (P)26.67%
Serine SER (S)13.33%
Arginine ARG (R)00%
Threonine THR (T)310%
Tryptophan TRP (W)26.67%
Valine VAL (V)13.33%
Tyrosine TYR (Y)26.67%


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

Ext. coefficient    13980
Absorption 0.1% (=1 g/l)    4.207
Aromaticity:0.167

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.56

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.67, 20.00, 20.00]

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:52.3333
Grand average of hydropathicity (GRAVY):0.00