Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5037
Number of amino acids:211
Molecular Weight:21998.28 Da
Theoretical pI:6.32


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)219.95%
Cysteine CYS (C)31.42%
Glutamic Acid GLU (E)62.84%
Aspartic Acid ASP (D)94.27%
Glycine GLY (G)2210.43%
Phynylalanine PHE (F)178.06%
Isoleucine ILE (I)104.74%
Histidine HIS (H)31.42%
Lysine LYS (K)115.21%
Methionine MET (M)31.42%
Leucine LEU (L)2411.37%
Asparagine ASN (N)104.74%
Glutamine GLN (Q)83.79%
Proline PRO (P)136.16%
Serine SER (S)219.95%
Arginine ARG (R)31.42%
Threonine THR (T)94.27%
Tryptophan TRP (W)00%
Valine VAL (V)167.58%
Tyrosine TYR (Y)20.95%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC998
HydrogenH1563
NitrogenN255
OxygenO292
SulphurS6

FormulaC998H1563N255O292S6
Total Number of Atoms:3114


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):15
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    3105
Absorption 0.1% (=1 g/l)    0.141,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.135,   assuming all CYS residues are reduced
Aromaticity:0.090

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.81

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.70, 31.28, 25.59]

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:94.7867
Grand average of hydropathicity (GRAVY):0.31