Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6060
Number of amino acids:145
Molecular Weight:15459.73 Da
Theoretical pI:6.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)128.28%
Cysteine CYS (C)106.9%
Glutamic Acid GLU (E)64.14%
Aspartic Acid ASP (D)64.14%
Glycine GLY (G)138.97%
Phynylalanine PHE (F)32.07%
Isoleucine ILE (I)42.76%
Histidine HIS (H)42.76%
Lysine LYS (K)42.76%
Methionine MET (M)32.07%
Leucine LEU (L)128.28%
Asparagine ASN (N)53.45%
Glutamine GLN (Q)42.76%
Proline PRO (P)138.97%
Serine SER (S)106.9%
Arginine ARG (R)85.52%
Threonine THR (T)96.21%
Tryptophan TRP (W)00%
Valine VAL (V)138.97%
Tyrosine TYR (Y)64.14%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC670
HydrogenH1062
NitrogenN190
OxygenO204
SulphurS13

FormulaC670H1062N190O204S13
Total Number of Atoms:2139


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    9565
Absorption 0.1% (=1 g/l)    0.619,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8940
Absorption 0.1% (=1 g/l)    0.578,   assuming all CYS residues are reduced
Aromaticity:0.062

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.43

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.21, 28.28, 22.76]

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:77.3103
Grand average of hydropathicity (GRAVY):-0.05