Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5091
Number of amino acids:101
Molecular Weight:11552.62 Da
Theoretical pI:8.09


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)21.98%
Cysteine CYS (C)109.9%
Glutamic Acid GLU (E)43.96%
Aspartic Acid ASP (D)65.94%
Glycine GLY (G)54.95%
Phynylalanine PHE (F)54.95%
Isoleucine ILE (I)87.92%
Histidine HIS (H)54.95%
Lysine LYS (K)76.93%
Methionine MET (M)21.98%
Leucine LEU (L)65.94%
Asparagine ASN (N)10.99%
Glutamine GLN (Q)21.98%
Proline PRO (P)76.93%
Serine SER (S)54.95%
Arginine ARG (R)54.95%
Threonine THR (T)65.94%
Tryptophan TRP (W)10.99%
Valine VAL (V)109.9%
Tyrosine TYR (Y)43.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC516
HydrogenH805
NitrogenN137
OxygenO140
SulphurS12

FormulaC516H805N137O140S12
Total Number of Atoms:1610


Total number of positively charged residues (ARG + LYS):12
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    12085
Absorption 0.1% (=1 g/l)    1.046,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    0.992,   assuming all CYS residues are reduced
Aromaticity:0.099

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.67

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.66, 17.82, 13.86]

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:84.7525
Grand average of hydropathicity (GRAVY):0.08