A Rapid and Efficient Method for the Extraction of Histone Proteins

Area of Science:

• Biochemistry
• Molecular Biology
• Cell Biology

Background:

• Histone extraction and purification are critical for studying chromatin structure and function.
• Existing methods are often time-consuming and can introduce artifacts, particularly in yeast.
• Preserving histone integrity and modifications is essential for accurate downstream analyses.

Purpose of the Study:

• To develop a simplified and efficient method for histone extraction and purification from yeast and mammalian cells.
• To overcome limitations of current protocols, such as N-terminal clipping of histone H3.
• To enable robust analysis of histone modifications, even from limited sample quantities.

Main Methods:

• Utilized a filter-aided sample preparation (FASP) approach.
• Employed acidified ethanol for histone extraction and inactivation of modifying enzymes.
• Applied the method to yeast, mammalian cells, and fungal clinical isolates.

Main Results:

• The FASP method significantly improved histone extraction efficiency and recovery.
• Acidified ethanol prevented N-terminal clipping of histone H3, a common artifact.
• The protocol is scalable, effective with as few as two million yeast cells.
• Successfully applied to analyze histone modifications in limited fungal clinical isolates.

Conclusions:

• The developed FASP method offers a faster, simpler, and more robust alternative for histone extraction.
• This approach enhances the study of histones and their modifications in various cell types, including those with limited material.
• The method is valuable for investigating histone modifications in clinical fungal isolates.