Pick-ya actin - a method to purify actin isoforms with bespoke key post-translational modifications.

Area of Science:

• Biochemistry
• Cell Biology
• Synthetic Biology

Background:

• Actin is a crucial eukaryotic cytoskeletal protein regulating vital cellular processes.
• Organisms exhibit unique patterns of actin post-translational modifications (PTMs), including acetylation and methylation.
• Existing methods lack the ability to produce actin isoforms with organism-specific PTM profiles.

Purpose of the Study:

• To develop a novel method for expressing eukaryotic actin isoforms with their characteristic PTM patterns.
• To enable the study of actin cytoskeleton function and PTMs across different species.

Main Methods:

• Utilized a synthetic biology approach in a yeast strain.
• Employed ubiquitin fusion to achieve desired N-terminal modifications.
• Incorporated mammalian enzymes to facilitate specific acetylation and methylation PTMs.

Main Results:

• Successfully developed the Pick-ya actin method for expressing diverse actin isoforms.
• Enabled the production of actin with organism-specific PTM signatures.
• Demonstrated a viable strategy for generating customized actin variants.

Conclusions:

• The Pick-ya actin method provides a powerful tool for actin research.
• Facilitates in-depth biochemical, structural, and physiological investigations of the actin cytoskeleton.
• Advances the understanding of actin PTMs and their functional implications.