Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1437
Number of amino acids:123
Molecular Weight:13371.58 Da
Theoretical pI:8.56


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)97.32%
Cysteine CYS (C)75.69%
Glutamic Acid GLU (E)32.44%
Aspartic Acid ASP (D)43.25%
Glycine GLY (G)1814.63%
Phynylalanine PHE (F)64.88%
Isoleucine ILE (I)75.69%
Histidine HIS (H)10.81%
Lysine LYS (K)43.25%
Methionine MET (M)21.63%
Leucine LEU (L)54.07%
Asparagine ASN (N)108.13%
Glutamine GLN (Q)43.25%
Proline PRO (P)118.94%
Serine SER (S)43.25%
Arginine ARG (R)64.88%
Threonine THR (T)75.69%
Tryptophan TRP (W)75.69%
Valine VAL (V)43.25%
Tyrosine TYR (Y)21.63%


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):10
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    41855
Absorption 0.1% (=1 g/l)    3.130,   assuming all pairs of CYS residues form cystines

Ext. coefficient    41480
Absorption 0.1% (=1 g/l)    3.102,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.85

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.20, 34.96, 15.45]

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:54.7967
Grand average of hydropathicity (GRAVY):0.00