Physicochemical Properties of Peptide



PPepDB ID:PPepDB_696
Number of amino acids:37
Molecular Weight:4440.65 Da
Theoretical pI:8.43


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)25.41%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)38.11%
Aspartic Acid ASP (D)38.11%
Glycine GLY (G)25.41%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)12.7%
Histidine HIS (H)00%
Lysine LYS (K)38.11%
Methionine MET (M)38.11%
Leucine LEU (L)38.11%
Asparagine ASN (N)12.7%
Glutamine GLN (Q)616.22%
Proline PRO (P)12.7%
Serine SER (S)00%
Arginine ARG (R)410.81%
Threonine THR (T)12.7%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)12.7%


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):7
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.336
Aromaticity:0.027

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 65.34

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[13.51, 10.81, 29.73]

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:47.5676
Grand average of hydropathicity (GRAVY):0.00