Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5933
Number of amino acids:109
Molecular Weight:11529.94 Da
Theoretical pI:8.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)76.42%
Cysteine CYS (C)76.42%
Glutamic Acid GLU (E)65.5%
Aspartic Acid ASP (D)65.5%
Glycine GLY (G)2422.02%
Phynylalanine PHE (F)54.59%
Isoleucine ILE (I)10.92%
Histidine HIS (H)10.92%
Lysine LYS (K)65.5%
Methionine MET (M)32.75%
Leucine LEU (L)76.42%
Asparagine ASN (N)54.59%
Glutamine GLN (Q)10.92%
Proline PRO (P)21.83%
Serine SER (S)54.59%
Arginine ARG (R)87.34%
Threonine THR (T)21.83%
Tryptophan TRP (W)00%
Valine VAL (V)65.5%
Tyrosine TYR (Y)76.42%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC493
HydrogenH759
NitrogenN147
OxygenO154
SulphurS10

FormulaC493H759N147O154S10
Total Number of Atoms:1563


Total number of positively charged residues (ARG + LYS):14
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    10805
Absorption 0.1% (=1 g/l)    0.937,   assuming all pairs of CYS residues form cystines

Ext. coefficient    10430
Absorption 0.1% (=1 g/l)    0.905,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.46

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.85, 33.03, 21.10]

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:51.0092
Grand average of hydropathicity (GRAVY):-0.43