[Tyrosine hydroxylase activity in two-dimensional monomolecular films]

Area of Science:

• Biochemistry
• Neuroscience
• Materials Science

Background:

• Tyrosine hydroxylase (TH) is a key neurospecific enzyme.
• Enzyme activity in immobilized states is crucial for biosensor development.
• Understanding enzyme behavior in thin films is vital for biotechnological applications.

Purpose of the Study:

• To investigate the activity of tyrosine hydroxylase (TH) within monomolecular films.
• To assess the impact of film formation on enzyme stability and function.
• To explore the potential of TH-based biosensors for detecting neuroleptic compounds.

Main Methods:

• Langmuir-Schaefer technology for forming two-dimensional enzyme films.
• Enzyme activity assays to quantify tyrosine hydroxylase function.
• Exposure to neuroleptic compounds to observe activity modulation.

Main Results:

• Tyrosine hydroxylase (TH) retained activity in monomolecular films on negative-charge surfaces.
• Film formation using Langmuir-Schaefer technology did not inactivate the enzyme.
• The neuroleptic trifluoperazine significantly increased TH activity.

Conclusions:

• Monomolecular films of tyrosine hydroxylase (TH) are a viable format for enzyme immobilization.
• Immobilized TH maintains its catalytic function and can be modulated by external compounds.
• TH-based biosensors show promise for the sensitive detection of neuroleptic-like substances.