Frontiers in bioinformatics · 2026
TNRSim - a simulator of truncated oxford nanopore direct RNA long reads for isoform analysis.
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Kozlova Anna, Sakharov Artemiy, Tarbeeva Svetlana, Ilgisonis Ekaterina, Ponomarenko Elena
Аннотация
INTRODUCTION: Nanopore sequencing opens up new opportunities in transcriptome research due to the possibility of generating full-length isoform reads. However, currently available simulation software does not fully reproduce read truncation, a key feature of transcriptomic nanopore libraries.
METHODS: We developed TNRSim (Truncated Nanopore Reads Simulator), a nanopore transcriptome library simulator designed to reproduce realistic read-length distributions, sequencing errors, and quality scores. We further used simulated datasets with known isoform abundances to benchmark widely used isoform quantification tools.
RESULTS: TNRSim reproduced characteristic read-truncation patterns observed in empirical direct RNA sequencing datasets and provided improvements in read-length distribution, mismatch, and quality-score simulation compared with existing approaches. In a closed-set benchmark of isoform quantification methods, oarfish achieved the highest quantification accuracy among the tested tools.
DISCUSSION: TNRSim provides a framework for realistic simulation of transcriptomic nanopore sequencing data and enables controlled benchmarking of computational methods for isoform-level analysis.
METHODS: We developed TNRSim (Truncated Nanopore Reads Simulator), a nanopore transcriptome library simulator designed to reproduce realistic read-length distributions, sequencing errors, and quality scores. We further used simulated datasets with known isoform abundances to benchmark widely used isoform quantification tools.
RESULTS: TNRSim reproduced characteristic read-truncation patterns observed in empirical direct RNA sequencing datasets and provided improvements in read-length distribution, mismatch, and quality-score simulation compared with existing approaches. In a closed-set benchmark of isoform quantification methods, oarfish achieved the highest quantification accuracy among the tested tools.
DISCUSSION: TNRSim provides a framework for realistic simulation of transcriptomic nanopore sequencing data and enables controlled benchmarking of computational methods for isoform-level analysis.