Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3477
Number of amino acids:80
Molecular Weight:8864.38 Da
Theoretical pI:8.7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)911.25%
Cysteine CYS (C)810%
Glutamic Acid GLU (E)33.75%
Aspartic Acid ASP (D)00%
Glycine GLY (G)56.25%
Phynylalanine PHE (F)78.75%
Isoleucine ILE (I)45%
Histidine HIS (H)22.5%
Lysine LYS (K)45%
Methionine MET (M)22.5%
Leucine LEU (L)56.25%
Asparagine ASN (N)67.5%
Glutamine GLN (Q)22.5%
Proline PRO (P)33.75%
Serine SER (S)56.25%
Arginine ARG (R)33.75%
Threonine THR (T)33.75%
Tryptophan TRP (W)11.25%
Valine VAL (V)56.25%
Tyrosine TYR (Y)33.75%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC396
HydrogenH602
NitrogenN106
OxygenO106
SulphurS10

FormulaC396H602N106O106S10
Total Number of Atoms:1220


Total number of positively charged residues (ARG + LYS):7
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    10470
Absorption 0.1% (=1 g/l)    1.181,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    1.125,   assuming all CYS residues are reduced
Aromaticity:0.138

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.45

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.25, 23.75, 23.75]

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:73.25
Grand average of hydropathicity (GRAVY):0.32