2020
DOI: 10.1093/bioinformatics/btaa440
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TandemTools: mapping long reads and assessing/improving assembly quality in extra-long tandem repeats

Abstract: Motivation Extra-long tandem repeats (ETRs) are widespread in eukaryotic genomes and play an important role in fundamental cellular processes, such as chromosome segregation. Although emerging long-read technologies have enabled ETR assemblies, the accuracy of such assemblies is difficult to evaluate since there are no tools for their quality assessment. Moreover, since the mapping of error-prone reads to ETRs remains an open problem, it is not clear how to polish draft ETR assemblies. … Show more

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Cited by 55 publications
(64 citation statements)
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“…7c–j , Supplementary Table 4 ). Mapped long-read coverage across the DXZ1 array shows uniform depth of coverage and high accuracy, as measured by TandemQUAST 41 (Fig. 2 e, f , Extended Data Figs.…”
Section: A Finished Human X Chromosomementioning
confidence: 91%
“…7c–j , Supplementary Table 4 ). Mapped long-read coverage across the DXZ1 array shows uniform depth of coverage and high accuracy, as measured by TandemQUAST 41 (Fig. 2 e, f , Extended Data Figs.…”
Section: A Finished Human X Chromosomementioning
confidence: 91%
“…We assessed the structure of the CHM13 and NHP centromeric HOR arrays by applying TandemMapper and TandemQUAST 52 ( https://github.com/ablab/TandemTools ; version from 20 March 2020), which can detect large structural assembly errors in repeat arrays. For the CHM13 centromere, we first aligned ONT reads longer than 50 kb to the CHM13 assembly containing the contiguous chromosome 8 with Winnowmap 43 (v.1.0) and extracted reads aligning to the centromeric HOR array (chr8:44243868–46323885).…”
Section: Methodsmentioning
confidence: 99%
“…The tools for the reconciliation of long tandem arrays, and their comparisons, are currently being developed [ 86 ]. Satellite arrays inside the existing assemblies/references can be curated, e.g., with TandemTools, a novel tool for the polishing and quality assessment of extra-long tandem repeats (ETRs) [ 87 ]. Specific long-read mappers can be used to align reads to highly repetitive reference sequences [ 88 ], while accounting for the allele bias (so that non-reference allele within a repeat does not penalize the alignment) [ 89 ].…”
Section: Long Readsmentioning
confidence: 99%