Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3951
Number of amino acids:46
Molecular Weight:4904.44 Da
Theoretical pI:9.55


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24.35%
Cysteine CYS (C)613.04%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)510.87%
Phynylalanine PHE (F)12.17%
Isoleucine ILE (I)48.7%
Histidine HIS (H)00%
Lysine LYS (K)36.52%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)00%
Glutamine GLN (Q)00%
Proline PRO (P)36.52%
Serine SER (S)613.04%
Arginine ARG (R)48.7%
Threonine THR (T)48.7%
Tryptophan TRP (W)00%
Valine VAL (V)12.17%
Tyrosine TYR (Y)24.35%


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):0
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    3355
Absorption 0.1% (=1 g/l)    0.684,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.608,   assuming all CYS residues are reduced
Aromaticity:0.065

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.54

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[17.39, 30.43, 4.35]

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:44.5652
Grand average of hydropathicity (GRAVY):0.00