Expression and purification of active, stabilized trimethyllysine hydroxylase

Area of Science:

• Biochemistry
• Enzymology
• Molecular Biology

Background:

• Carnitine biosynthesis is vital for cardiac energy metabolism, particularly under ischemic conditions.
• Previous research focused on inhibiting gamma-butyrobetaine dioxygenase, the final enzyme in carnitine biosynthesis.
• The role and regulation of trimethyllysine hydroxylase (TMLH), the initial enzyme, remain largely unexplored.

Purpose of the Study:

• To establish an efficient system for expressing and purifying active and stable trimethyllysine hydroxylase (TMLH).
• To facilitate the development of specific ligands for TMLH by providing necessary recombinant protein for binding and structural studies.

Main Methods:

• Expression of TMLH as a maltose-binding protein (MBP) fusion.
• Purification of the TMLH-MBP fusion protein from Escherichia coli.
• Assessment of protein activity and stability.

Main Results:

• An efficient system for producing large quantities of active and stable TMLH was successfully established.
• The TMLH was expressed as a functional maltose-binding protein fusion in E. coli.
• The purified recombinant protein is suitable for downstream biochemical and structural analyses.

Conclusions:

• The developed expression and purification system provides a reliable source of recombinant TMLH.
• This resource is essential for future studies aimed at understanding TMLH function and developing TMLH-targeting ligands.
• The findings open new avenues for exploring TMLH regulation in carnitine biosynthesis and its potential therapeutic implications.