A simple method for semi-random DNA amplicon fragmentation using the methylation-dependent restriction enzyme MspJI

Area of Science:

• Molecular Biology
• Genomics
• Biotechnology

Background:

• DNA fragmentation is crucial for next-generation sequencing library preparation.
• Existing physical and enzymatic shearing methods can be expensive or complex.
• MspJI restriction enzyme offers unique sequence-specific cleavage properties.

Purpose of the Study:

• To develop a simple, inexpensive, and efficient enzymatic method for semi-random DNA fragmentation.
• To enable high-throughput sequencing library preparation suitable for large-scale genomics projects.

Main Methods:

• Incorporation of 5-methyl-2 -deoxycytidine-5 -triphosphate during DNA amplification.
• Enzymatic digestion of DNA amplicons using the MspJI restriction enzyme.
• Optimization of 5-methyl-2 -deoxycytidine-5 -triphosphate concentration to control fragment size.

Main Results:

• A semi-random enzymatic DNA fragmentation method was successfully developed.
• Fragment size distribution was controllable by adjusting 5-methyl-2 -deoxycytidine-5 -triphosphate concentration.
• Generated DNA libraries showed relatively high random fragmentation and were suitable for Illumina MiSeq sequencing.

Conclusions:

• The MspJI-based method provides a cost-effective and labor-efficient alternative for DNA fragmentation.
• While coverage uniformity may be slightly lower than physical shearing, it is suitable for large-scale applications like BAC assembly and genotyping-by-sequencing.