Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1436
Number of amino acids:166
Molecular Weight:17882.35 Da
Theoretical pI:8


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)95.42%
Cysteine CYS (C)137.83%
Glutamic Acid GLU (E)42.41%
Aspartic Acid ASP (D)63.61%
Glycine GLY (G)2615.66%
Phynylalanine PHE (F)84.82%
Isoleucine ILE (I)74.22%
Histidine HIS (H)10.6%
Lysine LYS (K)42.41%
Methionine MET (M)21.2%
Leucine LEU (L)74.22%
Asparagine ASN (N)127.23%
Glutamine GLN (Q)84.82%
Proline PRO (P)169.64%
Serine SER (S)63.61%
Arginine ARG (R)84.82%
Threonine THR (T)127.23%
Tryptophan TRP (W)84.82%
Valine VAL (V)53.01%
Tyrosine TYR (Y)31.81%


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):12
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    49220
Absorption 0.1% (=1 g/l)    2.752,   assuming all pairs of CYS residues form cystines

Ext. coefficient    48470
Absorption 0.1% (=1 g/l)    2.710,   assuming all CYS residues are reduced
Aromaticity:0.114

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.57

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.89, 36.14, 13.25]

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:47.0482
Grand average of hydropathicity (GRAVY):0.00