Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1077
Number of amino acids:113
Molecular Weight:12141.21 Da
Theoretical pI:6.53


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)119.73%
Cysteine CYS (C)65.31%
Glutamic Acid GLU (E)65.31%
Aspartic Acid ASP (D)32.65%
Glycine GLY (G)54.42%
Phynylalanine PHE (F)43.54%
Isoleucine ILE (I)87.08%
Histidine HIS (H)10.88%
Lysine LYS (K)65.31%
Methionine MET (M)32.65%
Leucine LEU (L)1311.5%
Asparagine ASN (N)76.19%
Glutamine GLN (Q)10.88%
Proline PRO (P)54.42%
Serine SER (S)119.73%
Arginine ARG (R)32.65%
Threonine THR (T)87.08%
Tryptophan TRP (W)10.88%
Valine VAL (V)97.96%
Tyrosine TYR (Y)21.77%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC537
HydrogenH873
NitrogenN139
OxygenO161
SulphurS9

FormulaC537H873N139O161S9
Total Number of Atoms:1719


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8855
Absorption 0.1% (=1 g/l)    0.729,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.698,   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 : 38.41

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.74, 24.78, 29.20]

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:105.31
Grand average of hydropathicity (GRAVY):0.42