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Genome Annotation and Assembly

Genome Annotation and Assembly

The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.

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DNA isolation protocols can be fast and straightforward or complex and time-consuming depending on the type and quality of DNA required for further processing. For example, plasmid DNA extraction is a bit more complicated than genomic DNA extraction because of the need for an appropriate lysis method to separate plasmid DNA from gDNA during isolation. However, for specific applications, such as long-range DNA sequencing that require a good yield of high- quality DNA samples, we need to follow...

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Use of In Vivo Assembly for High-efficiency Plasmid Construction

Use of In Vivo Assembly for High-efficiency Plasmid Construction

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In Vivo DNA Assembly Using the PEDA Method.

Tianyuan Su¹, Qingxiao Pang², Qingsheng Qi³

¹State Key Laboratory of Microbial Technology, Shandong University, Qingdao, People's Republic of China.

Methods in Molecular Biology (Clifton, N.J.)

|March 12, 2024

Summary

Phage enzyme-assisted in vivo DNA assembly (PEDA) enables direct assembly of DNA parts in various microbes. This efficient method rivals in vitro techniques, accelerating synthetic biology advancements.

Keywords:

DNA assembly In vivo Molecular cloning Multiple microorganisms T4 DNA ligase T5 DNA exonuclease

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Area of Science:

Synthetic Biology
Molecular Biology
Microbiology

Background:

DNA assembly is crucial for synthetic biology.
Existing methods can be complex or limited in scope.
Need for efficient, versatile in vivo DNA assembly techniques.

Purpose of the Study:

To introduce and validate the PEDA method for direct in vivo DNA assembly.
To demonstrate PEDA's applicability across diverse microbial hosts.
To provide a protocol for PEDA implementation.

Main Methods:

Phage enzyme-assisted in vivo DNA assembly (PEDA) protocol.
Testing PEDA in Escherichia coli, Ralstonia eutropha, Pseudomonas putida, Lactobacillus plantarum, and Yarrowia lipolytica.
Assembly of DNA fragments using short homologous sequences (as low as 5 bp).

Main Results:

PEDA facilitates direct in vivo assembly of DNA parts.
Successful application in multiple bacterial and yeast species.
Achieved high assembly efficiency comparable to in vitro methods.
Demonstrated assembly with minimal homology arms (5 bp).

Conclusions:

PEDA is a simple, efficient, and versatile tool for in vivo DNA assembly.
The method broadens the toolkit for synthetic biology research.
PEDA supports rapid construction of DNA molecules in diverse microorganisms.