Methods for Controlled Protein Depletion to Study Protein Function during Meiosis

Area of Science:

• Molecular Biology
• Genetics
• Cell Biology

Background:

• Proteins involved in meiotic recombination often have critical roles in the mitotic cell cycle.
• Determining specific meiotic functions can be difficult due to essential mitotic roles and temporal expression patterns.
• The Sgs1-Top3-Rmi1 helicase-decatenase complex is vital for vegetative growth and genome stability, presenting a challenge for studying its meiotic functions.

Purpose of the Study:

• To develop and validate conditional loss-of-function mutant strategies for studying protein function specifically during meiosis.
• To investigate the role of the Sgs1-Top3-Rmi1 complex during budding yeast meiosis using novel conditional mutants.
• To refine methods for isolating meiotic recombination intermediates.

Main Methods:

• Construction of meiotic depletion alleles for conditional protein knockdown during meiosis.
• Generation of auxin-induced degradation alleles for rapid protein depletion in meiotic cells.
• Application of these conditional mutants to study the Sgs1 protein in budding yeast.
• Modification of psoralen cross-linking and cetyltrimethylammonium bromide methods for isolating meiotic recombination intermediates.

Main Results:

• Successfully constructed and demonstrated the utility of meiotic depletion and auxin-induced degradation alleles for specific protein depletion during budding yeast meiosis.
• Illustrated the application of these alleles using the essential Sgs1 protein.
• Developed an improved method for isolating meiotic recombination intermediates.

Conclusions:

• Conditional loss-of-function mutants are effective tools for dissecting essential protein functions during meiosis.
• The developed meiotic depletion and auxin-induced degradation systems provide precise temporal control over protein levels.
• The refined isolation method facilitates the study of meiotic recombination intermediates.