Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1502
Number of amino acids:167
Molecular Weight:17765.37 Da
Theoretical pI:6.44


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)95.39%
Cysteine CYS (C)127.19%
Glutamic Acid GLU (E)42.4%
Aspartic Acid ASP (D)74.19%
Glycine GLY (G)2716.17%
Phynylalanine PHE (F)95.39%
Isoleucine ILE (I)74.19%
Histidine HIS (H)10.6%
Lysine LYS (K)42.4%
Methionine MET (M)21.2%
Leucine LEU (L)74.19%
Asparagine ASN (N)105.99%
Glutamine GLN (Q)84.79%
Proline PRO (P)169.58%
Serine SER (S)74.19%
Arginine ARG (R)74.19%
Threonine THR (T)148.38%
Tryptophan TRP (W)74.19%
Valine VAL (V)52.99%
Tyrosine TYR (Y)21.2%


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):11
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    42230
Absorption 0.1% (=1 g/l)    2.377,   assuming all pairs of CYS residues form cystines

Ext. coefficient    41480
Absorption 0.1% (=1 g/l)    2.335,   assuming all CYS residues are reduced
Aromaticity:0.108

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.98

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.16, 35.93, 13.17]

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:46.7665
Grand average of hydropathicity (GRAVY):0.00