Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2556
Number of amino acids:35
Molecular Weight:4216.99 Da
Theoretical pI:4.95


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)617.14%
Glutamic Acid GLU (E)38.57%
Aspartic Acid ASP (D)38.57%
Glycine GLY (G)12.86%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)25.71%
Histidine HIS (H)12.86%
Lysine LYS (K)514.29%
Methionine MET (M)00%
Leucine LEU (L)38.57%
Asparagine ASN (N)12.86%
Glutamine GLN (Q)12.86%
Proline PRO (P)25.71%
Serine SER (S)00%
Arginine ARG (R)00%
Threonine THR (T)00%
Tryptophan TRP (W)25.71%
Valine VAL (V)25.71%
Tyrosine TYR (Y)25.71%


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):5
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14355
Absorption 0.1% (=1 g/l)    3.404,   assuming all pairs of CYS residues form cystines

Ext. coefficient    13980
Absorption 0.1% (=1 g/l)    3.315,   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 : 27.21

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.43, 11.43, 17.14]

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:72.2857
Grand average of hydropathicity (GRAVY):0.00