Extraction of high-quality, high-molecular-weight DNA depends heavily on cell homogenization methods in green microalgae
Citable URI
https://hdl.handle.net/1912/25656As published
https://doi.org/10.1002/aps3.11333DOI
10.1002/aps3.11333Abstract
Premise
New sequencing technologies have facilitated genomic studies in green microalgae; however, extracting high‐quality DNA is often a bottleneck for long‐read sequencing.
Methods and Results
Here, we present a low‐cost, highly transferrable method for the extraction of high‐molecular‐weight (HMW), high‐purity DNA from microalgae. We first determined the effect of sample preparation on DNA quality using three homogenization methods: manual grinding using a mini‐pestle, automatic grinding using a vortex adapter, and grinding in liquid nitrogen. We demonstrated the versatility of grinding in liquid nitrogen followed by a modified cetyltrimethylammonium bromide (CTAB) extraction across a suite of aquatic‐ and desert‐evolved algal taxa. Finally, we tested the protocol's robustness by doubling the input material to increase yield, producing per sample up to 20 μg of high‐purity DNA longer than 21.2 kbp.
Conclusions
All homogenization methods produced DNA within acceptable parameters for purity, but only liquid nitrogen grinding resulted in HMW DNA. The optimization of cell lysis while minimizing DNA shearing is therefore crucial for the isolation of DNA for long‐read genomic sequencing because template DNA length strongly affects read output and length.
Description
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Stark, J. R., Cardon, Z. G., & Peredo, E. L. Extraction of high-quality, high-molecular-weight DNA depends heavily on cell homogenization methods in green microalgae. Applications in Plant Sciences, 8(3), (2020): e11333, doi:10.1002/aps3.11333.
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Suggested Citation
Stark, J. R., Cardon, Z. G., & Peredo, E. L. (2020). Extraction of high-quality, high-molecular-weight DNA depends heavily on cell homogenization methods in green microalgae. Applications in Plant Sciences, 8(3), e11333.The following license files are associated with this item:
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 International
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