Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5287
Number of amino acids:321
Molecular Weight:35123.84 Da
Theoretical pI:9.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)247.48%
Cysteine CYS (C)30.93%
Glutamic Acid GLU (E)206.23%
Aspartic Acid ASP (D)61.87%
Glycine GLY (G)268.1%
Phynylalanine PHE (F)154.67%
Isoleucine ILE (I)329.97%
Histidine HIS (H)20.62%
Lysine LYS (K)278.41%
Methionine MET (M)41.25%
Leucine LEU (L)257.79%
Asparagine ASN (N)195.92%
Glutamine GLN (Q)247.48%
Proline PRO (P)216.54%
Serine SER (S)144.36%
Arginine ARG (R)82.49%
Threonine THR (T)175.3%
Tryptophan TRP (W)00%
Valine VAL (V)257.79%
Tyrosine TYR (Y)92.8%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1593
HydrogenH2565
NitrogenN419
OxygenO457
SulphurS7

FormulaC1593H2565N419O457S7
Total Number of Atoms:5041


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):26
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    13535
Absorption 0.1% (=1 g/l)    0.385,   assuming all pairs of CYS residues form cystines

Ext. coefficient    13410
Absorption 0.1% (=1 g/l)    0.382,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.77

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.02, 24.92, 22.74]

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:99.3146
Grand average of hydropathicity (GRAVY):-0.07