Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1096
Number of amino acids:134
Molecular Weight:13897.05 Da
Theoretical pI:7.45


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1410.45%
Cysteine CYS (C)128.96%
Glutamic Acid GLU (E)53.73%
Aspartic Acid ASP (D)32.24%
Glycine GLY (G)107.46%
Phynylalanine PHE (F)10.75%
Isoleucine ILE (I)118.21%
Histidine HIS (H)32.24%
Lysine LYS (K)75.22%
Methionine MET (M)32.24%
Leucine LEU (L)85.97%
Asparagine ASN (N)107.46%
Glutamine GLN (Q)21.49%
Proline PRO (P)42.99%
Serine SER (S)139.7%
Arginine ARG (R)21.49%
Threonine THR (T)118.21%
Tryptophan TRP (W)00%
Valine VAL (V)118.21%
Tyrosine TYR (Y)42.99%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC589
HydrogenH967
NitrogenN165
OxygenO191
SulphurS15

FormulaC589H967N165O191S15
Total Number of Atoms:1927


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):8
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)    0.483,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.429,   assuming all CYS residues are reduced
Aromaticity:0.037

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.77

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.12, 27.61, 22.39]

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:89.5523
Grand average of hydropathicity (GRAVY):0.30