Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1223
Number of amino acids:247
Molecular Weight:26684.43 Da
Theoretical pI:8.57


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)208.1%
Cysteine CYS (C)166.48%
Glutamic Acid GLU (E)62.43%
Aspartic Acid ASP (D)104.05%
Glycine GLY (G)2610.53%
Phynylalanine PHE (F)145.67%
Isoleucine ILE (I)93.64%
Histidine HIS (H)20.81%
Lysine LYS (K)114.45%
Methionine MET (M)41.62%
Leucine LEU (L)114.45%
Asparagine ASN (N)166.48%
Glutamine GLN (Q)83.24%
Proline PRO (P)218.5%
Serine SER (S)145.67%
Arginine ARG (R)114.45%
Threonine THR (T)228.91%
Tryptophan TRP (W)52.02%
Valine VAL (V)114.45%
Tyrosine TYR (Y)93.64%


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):22
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    41910
Absorption 0.1% (=1 g/l)    1.571,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40910
Absorption 0.1% (=1 g/l)    1.533,   assuming all CYS residues are reduced
Aromaticity:0.113

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.92

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.89, 31.17, 16.60]

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:52.5911
Grand average of hydropathicity (GRAVY):0.00