Physicochemical Properties of Peptide



PPepDB ID:PPepDB_717
Number of amino acids:193
Molecular Weight:20429.05 Da
Theoretical pI:6.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)136.74%
Cysteine CYS (C)136.74%
Glutamic Acid GLU (E)10.52%
Aspartic Acid ASP (D)94.66%
Glycine GLY (G)2613.47%
Phynylalanine PHE (F)189.33%
Isoleucine ILE (I)63.11%
Histidine HIS (H)10.52%
Lysine LYS (K)00%
Methionine MET (M)10.52%
Leucine LEU (L)126.22%
Asparagine ASN (N)136.74%
Glutamine GLN (Q)63.11%
Proline PRO (P)94.66%
Serine SER (S)189.33%
Arginine ARG (R)105.18%
Threonine THR (T)157.77%
Tryptophan TRP (W)31.55%
Valine VAL (V)94.66%
Tyrosine TYR (Y)42.07%


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):10
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    23210
Absorption 0.1% (=1 g/l)    1.136,   assuming all pairs of CYS residues form cystines

Ext. coefficient    22460
Absorption 0.1% (=1 g/l)    1.099,   assuming all CYS residues are reduced
Aromaticity:0.130

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.42

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.94, 34.20, 13.99]

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:56.6321
Grand average of hydropathicity (GRAVY):0.00