Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2535
Number of amino acids:38
Molecular Weight:4156.69 Da
Theoretical pI:6.01


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)410.53%
Cysteine CYS (C)615.79%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)37.89%
Glycine GLY (G)37.89%
Phynylalanine PHE (F)12.63%
Isoleucine ILE (I)12.63%
Histidine HIS (H)25.26%
Lysine LYS (K)25.26%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)25.26%
Glutamine GLN (Q)12.63%
Proline PRO (P)37.89%
Serine SER (S)25.26%
Arginine ARG (R)12.63%
Threonine THR (T)25.26%
Tryptophan TRP (W)25.26%
Valine VAL (V)12.63%
Tyrosine TYR (Y)12.63%


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):3
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    12865
Absorption 0.1% (=1 g/l)    3.095,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    3.005,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[15.79, 26.32, 10.53]

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:28.421
Grand average of hydropathicity (GRAVY):0.00