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Cellophane based mini-prep method for DNA extraction from the filamentous fungus Trichoderma reesei
Alexandre Cassago1, Rodrigo Panepucci, Ana Baião
1Laboratório de Biologia Molecular, Departamento de Genética e Evolução, Centro de Ciências Biológicas e da Saúde, Universidade Federal de São Carlos, Rodovia Washington Luís Km 235 - CEP: 13565-905 São Carlos, SP, Brazil. casslex@rocketmail.com
BMC Microbiology
|June 25, 2002
Summary
This study presents a streamlined DNA extraction method for filamentous fungi, eliminating laborious steps. The new protocol yields high-quality DNA suitable for Polymerase Chain Reaction (PCR) and Southern blot analyses.
Area of Science:
- Mycology
- Molecular Biology
- Biotechnology
Background:
- Traditional DNA extraction from filamentous fungi is time-consuming, often requiring liquid nitrogen maceration.
- Existing protocols are laborious due to the need for extensive sample preparation after liquid culture growth.
Purpose of the Study:
- To develop a simplified and efficient DNA extraction method for filamentous fungi.
- To replace labor-intensive steps in current fungal DNA isolation protocols.
Main Methods:
- Cultivating fungal mycelium on cellophane disks over solid medium.
- Utilizing glass beads for effective cell wall disruption.
- Avoiding maceration in liquid nitrogen.
Main Results:
- Successfully extracted approximately 2 microg of total DNA per cellophane disk from Trichoderma reesei.
- Confirmed DNA quality through successful Polymerase Chain Reaction (PCR) amplification of the hph gene.
- Validated DNA suitability for Southern blot analysis, showing a clear and strong band for the target gene.
Conclusions:
- The novel method provides pure DNA from Trichoderma reesei, bypassing tedious traditional steps.
- Obtained DNA is suitable for downstream molecular applications like PCR and Southern blotting.
- The protocol allows simultaneous processing of multiple samples and minimizes contamination risks.