Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5429
Number of amino acids:215
Molecular Weight:22680.94 Da
Theoretical pI:5.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2411.16%
Cysteine CYS (C)83.72%
Glutamic Acid GLU (E)136.05%
Aspartic Acid ASP (D)94.19%
Glycine GLY (G)177.91%
Phynylalanine PHE (F)83.72%
Isoleucine ILE (I)136.05%
Histidine HIS (H)62.79%
Lysine LYS (K)104.65%
Methionine MET (M)41.86%
Leucine LEU (L)219.77%
Asparagine ASN (N)125.58%
Glutamine GLN (Q)83.72%
Proline PRO (P)177.91%
Serine SER (S)136.05%
Arginine ARG (R)41.86%
Threonine THR (T)125.58%
Tryptophan TRP (W)00%
Valine VAL (V)136.05%
Tyrosine TYR (Y)31.4%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC999
HydrogenH1589
NitrogenN269
OxygenO308
SulphurS12

FormulaC999H1589N269O308S12
Total Number of Atoms:3177


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):22
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    4970
Absorption 0.1% (=1 g/l)    0.219,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.197,   assuming all CYS residues are reduced
Aromaticity:0.051

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.14

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.98, 27.44, 28.84]

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:90.3721
Grand average of hydropathicity (GRAVY):0.03