Phased nucleotide inserts for sequencing low-diversity RNA samples from in vitro selection experiments.

Area of Science:

• Molecular Biology
• Biotechnology
• Genomics

Background:

• In vitro selection and high-throughput sequencing are key for RNA engineering.
• Low-diversity regions in sequencing libraries can cause data loss.
• Bacteriophage PhiX genome is used to improve sequence quality but reduces read depth.

Purpose of the Study:

• To evaluate phased inserts as an alternative to PhiX for low-diversity samples.
• To assess the impact of phased inserts on sequencing data quality and read depth.
• To determine if phased inserts can replace PhiX in ribozyme activity screens.

Main Methods:

• Designed 4096 RNA variants of the twister ribozyme from Oryza sativa.
• Utilized phased inserts in sequencing adaptors for low-diversity libraries.
• Performed deep sequencing on an Illumina MiSeq to analyze ribozyme cleavage fractions.

Main Results:

• Libraries with phased inserts yielded high-quality sequence data without PhiX.
• Phased inserts preserved read depth effectively.
• Data generated with phased inserts showed good agreement with previously published twister ribozyme data.

Conclusions:

• Phased inserts are a viable alternative to PhiX for low-diversity samples.
• This approach maximizes read depth and data quality in high-throughput sequencing.
• Phased inserts can reduce or eliminate the need for PhiX in post-selection experiments.