Related Experiment Video
Updated: May 13, 2026
13:47
Enhanced Reduced Representation Bisulfite Sequencing for Assessment of DNA Methylation at Base Pair Resolution
Published on: February 24, 2015
The MASTER (methylation-assisted tailorable ends rational) ligation method for seamless DNA assembly
Wei-Hua Chen1, Zhong-Jun Qin, Jin Wang
1Laboratory of Synthetic Biology, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 20032, China.
Nucleic Acids Research
|February 28, 2013
Summary
A new DNA assembly method, MASTER Ligation, enables seamless joining of multiple DNA sequences using the MspJI enzyme. This technique simplifies synthetic biology workflows and was validated by assembling a large gene cluster for heterologous expression.
Area of Science:
- Synthetic biology
- Molecular biology
- Biotechnology
Background:
- High-throughput seamless DNA assembly is crucial for synthetic biology.
- Existing methods include homologous recombination and type IIS restriction enzyme systems.
- There is a need for simpler, sequence-independent DNA assembly techniques.
Purpose of the Study:
- To introduce a novel, simple, and sequence-independent method for seamless DNA assembly.
- To demonstrate the utility of the MASTER Ligation method for assembling large DNA constructs.
- To enable heterologous expression of assembled DNA sequences.
Main Methods:
- Developed the MASTER Ligation technique utilizing the MspJI restriction endonuclease.
- MspJI recognizes methylation-specific 4-bp sites ((m)CNNR) and cuts outside the recognition sequence.
- Applied the method to assemble multiple polymerase chain reaction amplicons and restriction fragments.
Main Results:
- Successfully assembled multiple DNA sequences seamlessly using the MASTER Ligation method.
- Demonstrated the assembly of the approximately 29 kb actinorhodin biosynthetic gene cluster from Streptomyces coelicolor.
- Achieved heterologous expression of the assembled gene cluster in Streptomyces sp. 4F.
Conclusions:
- MASTER Ligation offers a novel, efficient, and versatile approach for seamless DNA assembly.
- The method's sequence-independent nature and hierarchical procedure simplify complex synthetic biology applications.
- Successful assembly and expression of a large gene cluster highlight the method's potential in metabolic engineering and synthetic biology.
Related Concept Videos
01:05Maxam-Gilbert Sequencing
In the same year as the discovery of the Sanger sequencing method, another group of scientists, Allan Maxam and Walter Gilbert, demonstrated their chemical-cleavage method for DNA sequencing. The Maxam-Gilbert method relies on using different chemicals that can cleave the DNA sequence at specific sites, the separation of resulting DNA fragments of variable size using electrophoresis, and deciphering the DNA sequence from the resulting gel bands.
Challenges of the Maxam-Gilbert Method
The...
Challenges of the Maxam-Gilbert Method
The...
02:31Homologous Recombination
The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
03:00Next-generation Sequencing
The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features.
01:57Sanger Sequencing
DNA sequencing is a fundamental technique that is routinely used in the biological sciences. This method can be applied to a range of questions at different scales - from the sequencing of a cloned DNA fragment or the study of a mutation in a gene up to whole-genome sequencing. However, despite the widespread use of sequencing today, it was not until 1977 that Fredrick Sanger and his collaborators developed the chain-termination method to decode DNA sequences. It relies on the separation of a...