Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1601
Number of amino acids:29
Molecular Weight:3142.71 Da
Theoretical pI:7.53


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)26.9%
Cysteine CYS (C)620.69%
Glutamic Acid GLU (E)13.45%
Aspartic Acid ASP (D)00%
Glycine GLY (G)26.9%
Phynylalanine PHE (F)13.45%
Isoleucine ILE (I)310.34%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)13.45%
Asparagine ASN (N)26.9%
Glutamine GLN (Q)00%
Proline PRO (P)26.9%
Serine SER (S)310.34%
Arginine ARG (R)26.9%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)26.9%
Tyrosine TYR (Y)26.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC133
HydrogenH209
NitrogenN37
OxygenO39
SulphurS6

FormulaC133H209N37O39S6
Total Number of Atoms:424


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):1
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    3355
Absorption 0.1% (=1 g/l)    1.068,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.948,   assuming all CYS residues are reduced
Aromaticity:0.103

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.80

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.03, 31.03, 13.79]

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:80.6896
Grand average of hydropathicity (GRAVY):0.64