Preparation of yeast RNA

Area of Science:

• Molecular Biology
• Yeast Genetics
• Nucleic Acid Extraction

Background:

• Accurate RNA extraction is crucial for downstream molecular biology applications.
• Yeast cell wall complexity necessitates robust lysis methods for efficient nucleic acid recovery.
• Minimizing DNA contamination is essential for reliable RNA analysis.

Purpose of the Study:

• To present and compare two distinct protocols for RNA extraction from yeast.
• To evaluate the efficacy and purity of RNA obtained by different lysis methods.
• To describe a scalable protocol for large-scale RNA isolation for poly(A)+ RNA preparation.

Main Methods:

• Protocol 1: RNA isolation from intact yeast cells using hot acidic phenol extraction.
• Protocol 2: Yeast cell disruption via vigorous mixing with glass beads and denaturing agents.
• Protocol 3: Scaled-up versions of Protocols 1 and 2 for increased RNA yield.

Main Results:

• Hot acidic phenol extraction yields RNA with minimal DNA contamination and low sample-to-sample variation.
• Glass bead disruption efficiently lyses yeast cells but results in significant residual DNA.
• Scalable protocols were successfully developed for both methods, enabling larger RNA preparations.

Conclusions:

• Hot acidic phenol extraction is a preferred method for obtaining high-purity yeast RNA with consistency.
• While glass bead disruption offers efficient lysis, it requires further steps to remove DNA contamination.
• The described scalable protocols facilitate the preparation of sufficient total RNA for subsequent poly(A)+ RNA enrichment.