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Updated: May 3, 2026
Isolation of mRNAs Associated with Yeast Mitochondria to Study Mechanisms of Localized Translation
Published on: March 14, 2014
Optimized protocol for high-efficiency mitochondrial RNA isolation from fission yeast in log phase and stationary
Yijing Lu1, Gang Wang1, Jinjie Shang1
1Jiangsu Key Laboratory for Microbes and Functional Genetics, College of Life Sciences, Nanjing Normal University, Nanjing 210023, China.
Abstract:
The fission yeast Schizosaccharomyces pombe (S. pombe) serves as an important model organism for investigating mitochondrial function and gene regulation. However, obtaining sufficient quantity and high-quality mitochondrial RNA (mtRNA) for techniques like Northern blot analysis remains challenging, particularly from stationary-phase cells with rigid cell walls. We developed an improved extraction method by comparing conventional hot-phenol and commercial column-based approaches with modified Enzymatic-Phenol/Chloroform (EPC) protocol, which replaces harsh thermal/liquid nitrogen steps with gentle enzymatic lysis. Additionally, for hard-to-lyse stationary-phase cells, we introduced a specialized OM Buffer to enhance efficiency. The refined EPC protocol achieved substantially higher mtRNA yields without compromising RNA purity. Northern blot analysis confirmed successful isolation of mtRNAs, revealing strong, well-defined signals for mtRNA. This protocol provides a reliable tool for advanced mitochondrial research in S. pombe and other eukaryotes.
Insights
We optimized mitochondrial RNA extraction from fission yeast, achieving higher yields and purity using a gentle enzymatic method. This improved protocol supports advanced mitochondrial studies in Schizosaccharomyces pombe.
Area of Science:
- Mitochondrial biology
- Molecular genetics
- Yeast genetics
Background:
- Fission yeast (Schizosaccharomyces pombe) is a key model for mitochondrial research.
- Extracting high-quality mitochondrial RNA (mtRNA) from S. pombe, especially stationary-phase cells, is difficult.
- Existing methods often involve harsh conditions unsuitable for preserving RNA integrity.
Purpose of the Study:
- To develop an improved method for extracting high-yield, high-purity mtRNA from S. pombe.
- To overcome challenges associated with lysing rigid, stationary-phase yeast cells.
- To enable robust downstream applications like Northern blot analysis.
Main Methods:
- Compared conventional hot-phenol and column-based RNA extraction with a modified Enzymatic-Phenol/Chloroform (EPC) protocol.
- Incorporated a specialized OM Buffer for enhanced lysis of stationary-phase cells.
- Replaced harsh thermal and liquid nitrogen lysis steps with enzymatic lysis.
Main Results:
- The refined EPC protocol yielded significantly higher quantities of mtRNA.
- RNA purity was maintained, ensuring suitability for sensitive analyses.
- Northern blot analysis confirmed successful isolation of intact mtRNAs with clear signals.
Conclusions:
- The modified EPC protocol offers a reliable and efficient method for mtRNA extraction from S. pombe.
- This protocol facilitates advanced research into mitochondrial function and gene regulation.
- The method is potentially applicable to other eukaryotic organisms with challenging cell types.
