Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5356
Number of amino acids:109
Molecular Weight:12301.37 Da
Theoretical pI:8.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)65.5%
Cysteine CYS (C)65.5%
Glutamic Acid GLU (E)54.59%
Aspartic Acid ASP (D)65.5%
Glycine GLY (G)76.42%
Phynylalanine PHE (F)87.34%
Isoleucine ILE (I)87.34%
Histidine HIS (H)43.67%
Lysine LYS (K)1110.09%
Methionine MET (M)32.75%
Leucine LEU (L)87.34%
Asparagine ASN (N)43.67%
Glutamine GLN (Q)43.67%
Proline PRO (P)32.75%
Serine SER (S)87.34%
Arginine ARG (R)54.59%
Threonine THR (T)43.67%
Tryptophan TRP (W)00%
Valine VAL (V)76.42%
Tyrosine TYR (Y)21.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC546
HydrogenH869
NitrogenN151
OxygenO154
SulphurS9

FormulaC546H869N151O154S9
Total Number of Atoms:1729


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):11
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    3355
Absorption 0.1% (=1 g/l)    0.273,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.242,   assuming all CYS residues are reduced
Aromaticity:0.092

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.52

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.28, 20.18, 20.18]

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:81.3762
Grand average of hydropathicity (GRAVY):-0.13