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Updated: Jun 19, 2026

Single-Copy Gene Locus Chromatin Purification in Saccharomyces cerevisiae
Published on: November 17, 2023
Isolation of nuclei from yeast
1Laboratory of Molecular Biology and the Department of Bacteriology, University of Wisconsin, Madison, Wisconsin 53706.
A new method efficiently isolates yeast nuclei, yielding a high DNA/protein ratio. These isolated nuclei exhibit key structural features and maintain RNA synthesis capabilities, proving useful for molecular studies.
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- Efficient isolation of Saccharomyces cerevisiae nuclei is crucial for studying nuclear components and functions.
- Previous methods may yield low quantities or compromised nuclear integrity.
Purpose of the Study:
- To develop and describe a high-yield method for isolating nuclei from Saccharomyces cerevisiae.
- To characterize the isolated nuclei and assess their suitability for further molecular analysis.
Main Methods:
- A novel isolation procedure for Saccharomyces cerevisiae nuclei.
- Microscopic examination (phase and electron microscopy) of isolated nuclei.
- Investigation of optimal conditions for histone extraction and resolution.
- Assay of RNA polymerase activity and in vitro RNA synthesis.
Main Results:
- High yield of isolated nuclei achieved.
- Isolated nuclei show a 10-fold higher DNA/protein ratio compared to whole cells.
- Microscopic analysis reveals double membranes, microtubules, and a characteristic crescent structure.
- Active RNA polymerase (E.C. 2.7.7.6) confirmed, enabling in vitro RNA synthesis.
- Nuclei are readily stainable with Giemsa's, Feulgen's, and acridine orange.
Conclusions:
- The described method provides a reliable way to obtain pure, intact yeast nuclei in high yield.
- Isolated nuclei are suitable for biochemical studies, including histone analysis and RNA synthesis.
- These nuclei serve as a valuable resource for investigating yeast molecular biology and genetics.
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