Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4247
Number of amino acids:130
Molecular Weight:13912.06 Da
Theoretical pI:6.89


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)96.92%
Cysteine CYS (C)107.69%
Glutamic Acid GLU (E)53.85%
Aspartic Acid ASP (D)75.38%
Glycine GLY (G)118.46%
Phynylalanine PHE (F)75.38%
Isoleucine ILE (I)75.38%
Histidine HIS (H)21.54%
Lysine LYS (K)86.15%
Methionine MET (M)21.54%
Leucine LEU (L)118.46%
Asparagine ASN (N)75.38%
Glutamine GLN (Q)00%
Proline PRO (P)107.69%
Serine SER (S)129.23%
Arginine ARG (R)43.08%
Threonine THR (T)64.62%
Tryptophan TRP (W)10.77%
Valine VAL (V)86.15%
Tyrosine TYR (Y)32.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC613
HydrogenH960
NitrogenN162
OxygenO183
SulphurS12

FormulaC613H960N162O183S12
Total Number of Atoms:1930


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    10595
Absorption 0.1% (=1 g/l)    0.762,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.717,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.09

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.46, 30.77, 20.77]

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:78.7693
Grand average of hydropathicity (GRAVY):0.08