Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5610
Number of amino acids:75
Molecular Weight:8581.3 Da
Theoretical pI:8.72


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)22.67%
Cysteine CYS (C)810.67%
Glutamic Acid GLU (E)45.33%
Aspartic Acid ASP (D)22.67%
Glycine GLY (G)56.67%
Phynylalanine PHE (F)56.67%
Isoleucine ILE (I)45.33%
Histidine HIS (H)00%
Lysine LYS (K)68%
Methionine MET (M)45.33%
Leucine LEU (L)810.67%
Asparagine ASN (N)22.67%
Glutamine GLN (Q)45.33%
Proline PRO (P)45.33%
Serine SER (S)45.33%
Arginine ARG (R)45.33%
Threonine THR (T)45.33%
Tryptophan TRP (W)22.67%
Valine VAL (V)34%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC378
HydrogenH605
NitrogenN101
OxygenO102
SulphurS12

FormulaC378H605N101O102S12
Total Number of Atoms:1198


Total number of positively charged residues (ARG + LYS):10
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    11500
Absorption 0.1% (=1 g/l)    1.340,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11000
Absorption 0.1% (=1 g/l)    1.282,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.91

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.33, 20.00, 24.00]

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:76.6668
Grand average of hydropathicity (GRAVY):0.09