Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5774
Number of amino acids:75
Molecular Weight:8522.84 Da
Theoretical pI:6.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)34%
Cysteine CYS (C)912%
Glutamic Acid GLU (E)56.67%
Aspartic Acid ASP (D)56.67%
Glycine GLY (G)45.33%
Phynylalanine PHE (F)45.33%
Isoleucine ILE (I)11.33%
Histidine HIS (H)22.67%
Lysine LYS (K)56.67%
Methionine MET (M)11.33%
Leucine LEU (L)79.33%
Asparagine ASN (N)34%
Glutamine GLN (Q)22.67%
Proline PRO (P)11.33%
Serine SER (S)45.33%
Arginine ARG (R)56.67%
Threonine THR (T)56.67%
Tryptophan TRP (W)11.33%
Valine VAL (V)79.33%
Tyrosine TYR (Y)11.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC364
HydrogenH579
NitrogenN105
OxygenO111
SulphurS10

FormulaC364H579N105O111S10
Total Number of Atoms:1169


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

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    0.879,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.820,   assuming all CYS residues are reduced
Aromaticity:0.080

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.51

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.00, 16.00, 21.33]

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:72.6666
Grand average of hydropathicity (GRAVY):-0.15