Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1108
Number of amino acids:134
Molecular Weight:14148.36 Da
Theoretical pI:6.18


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)118.21%
Cysteine CYS (C)128.96%
Glutamic Acid GLU (E)64.48%
Aspartic Acid ASP (D)53.73%
Glycine GLY (G)75.22%
Phynylalanine PHE (F)32.24%
Isoleucine ILE (I)64.48%
Histidine HIS (H)00%
Lysine LYS (K)107.46%
Methionine MET (M)32.24%
Leucine LEU (L)128.96%
Asparagine ASN (N)53.73%
Glutamine GLN (Q)64.48%
Proline PRO (P)32.24%
Serine SER (S)1813.43%
Arginine ARG (R)10.75%
Threonine THR (T)107.46%
Tryptophan TRP (W)00%
Valine VAL (V)128.96%
Tyrosine TYR (Y)42.99%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC604
HydrogenH992
NitrogenN158
OxygenO200
SulphurS15

FormulaC604H992N158O200S15
Total Number of Atoms:1969


Total number of positively charged residues (ARG + LYS):11
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    6710
Absorption 0.1% (=1 g/l)    0.474,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.421,   assuming all CYS residues are reduced
Aromaticity:0.052

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.85

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.61, 24.63, 23.88]

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:86.5671
Grand average of hydropathicity (GRAVY):0.24