Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6081
Number of amino acids:98
Molecular Weight:10992.64 Da
Theoretical pI:6.23


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)77.14%
Cysteine CYS (C)88.16%
Glutamic Acid GLU (E)88.16%
Aspartic Acid ASP (D)44.08%
Glycine GLY (G)77.14%
Phynylalanine PHE (F)88.16%
Isoleucine ILE (I)77.14%
Histidine HIS (H)00%
Lysine LYS (K)77.14%
Methionine MET (M)11.02%
Leucine LEU (L)55.1%
Asparagine ASN (N)55.1%
Glutamine GLN (Q)22.04%
Proline PRO (P)44.08%
Serine SER (S)66.12%
Arginine ARG (R)55.1%
Threonine THR (T)55.1%
Tryptophan TRP (W)11.02%
Valine VAL (V)55.1%
Tyrosine TYR (Y)33.06%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC487
HydrogenH752
NitrogenN128
OxygenO144
SulphurS9

FormulaC487H752N128O144S9
Total Number of Atoms:1520


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):12
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)    0.952,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.907,   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 : 52.54

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.59, 22.45, 21.43]

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:69.6939
Grand average of hydropathicity (GRAVY):-0.10