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Kevlar: A Mapping-Free Framework for Accurate Discovery of De Novo Variants

Identifieur interne : 001231 ( Pmc/Curation ); précédent : 001230; suivant : 001232

Kevlar: A Mapping-Free Framework for Accurate Discovery of De Novo Variants

Auteurs : Daniel S. Standage [États-Unis] ; C. Titus Brown [États-Unis] ; Fereydoun Hormozdiari [États-Unis]

Source :

RBID : PMC:6682328

Abstract

Summary

De novo genetic variants are an important source of causative variation in complex genetic disorders. Many methods for variant discovery rely on mapping reads to a reference genome, detecting numerous inherited variants irrelevant to the phenotype of interest. To distinguish between inherited and de novo variation, sequencing of families (parents and siblings) is commonly pursued. However, standard mapping-based approaches tend to have a high false-discovery rate for de novo variant prediction. Kevlar is a mapping-free method for de novo variant discovery, based on direct comparison of sequences between related individuals. Kevlar identifies high-abundance k-mers unique to the individual of interest. Reads containing these k-mers are partitioned into disjoint sets by shared k-mer content for variant calling, and preliminary variant predictions are sorted using a probabilistic score. We evaluated Kevlar on simulated and real datasets, demonstrating its ability to detect both de novo single-nucleotide variants and indels with high accuracy.


Url:
DOI: 10.1016/j.isci.2019.07.032
PubMed: 31377530
PubMed Central: 6682328

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PMC:6682328

Le document en format XML

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<p>
<italic>De novo</italic>
genetic variants are an important source of causative variation in complex genetic disorders. Many methods for variant discovery rely on mapping reads to a reference genome, detecting numerous inherited variants irrelevant to the phenotype of interest. To distinguish between inherited and
<italic>de novo</italic>
variation, sequencing of families (parents and siblings) is commonly pursued. However, standard mapping-based approaches tend to have a high false-discovery rate for
<italic>de novo</italic>
variant prediction. Kevlar is a mapping-free method for
<italic>de novo</italic>
variant discovery, based on direct comparison of sequences between related individuals. Kevlar identifies high-abundance
<italic>k</italic>
-mers unique to the individual of interest. Reads containing these
<italic>k</italic>
-mers are partitioned into disjoint sets by shared
<italic>k</italic>
-mer content for variant calling, and preliminary variant predictions are sorted using a probabilistic score. We evaluated Kevlar on simulated and real datasets, demonstrating its ability to detect both
<italic>de novo</italic>
single-nucleotide variants and indels with high accuracy.</p>
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</TEI>
<pmc article-type="research-article">
<pmc-dir>properties open_access</pmc-dir>
<front>
<journal-meta>
<journal-id journal-id-type="nlm-ta">iScience</journal-id>
<journal-id journal-id-type="iso-abbrev">iScience</journal-id>
<journal-title-group>
<journal-title>iScience</journal-title>
</journal-title-group>
<issn pub-type="epub">2589-0042</issn>
<publisher>
<publisher-name>Elsevier</publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="pmid">31377530</article-id>
<article-id pub-id-type="pmc">6682328</article-id>
<article-id pub-id-type="publisher-id">S2589-0042(19)30259-7</article-id>
<article-id pub-id-type="doi">10.1016/j.isci.2019.07.032</article-id>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Article</subject>
</subj-group>
</article-categories>
<title-group>
<article-title>Kevlar: A Mapping-Free Framework for Accurate Discovery of
<italic>De Novo</italic>
Variants</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname>Standage</surname>
<given-names>Daniel S.</given-names>
</name>
<email>daniel.standage@nbacc.dhs.gov</email>
<xref rid="aff1" ref-type="aff">1</xref>
<xref rid="fn1" ref-type="fn">5</xref>
<xref rid="cor1" ref-type="corresp"></xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Brown</surname>
<given-names>C. Titus</given-names>
</name>
<email>ctbrown@ucdavis.edu</email>
<xref rid="aff1" ref-type="aff">1</xref>
<xref rid="aff2" ref-type="aff">2</xref>
<xref rid="cor2" ref-type="corresp">∗∗</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Hormozdiari</surname>
<given-names>Fereydoun</given-names>
</name>
<email>fhormozd@ucdavis.edu</email>
<xref rid="aff2" ref-type="aff">2</xref>
<xref rid="aff3" ref-type="aff">3</xref>
<xref rid="aff4" ref-type="aff">4</xref>
<xref rid="fn2" ref-type="fn">6</xref>
<xref rid="cor3" ref-type="corresp">∗∗∗</xref>
</contrib>
</contrib-group>
<aff id="aff1">
<label>1</label>
Population Health and Reproduction, University of California, Davis, USA</aff>
<aff id="aff2">
<label>2</label>
Genome Center, University of California, Davis, USA</aff>
<aff id="aff3">
<label>3</label>
MIND Institute, University of California, Davis, USA</aff>
<aff id="aff4">
<label>4</label>
Biochemistry and Molecular Medicine, University of California, Davis, 1 Shields Avenue, Davis, CA 95616, USA</aff>
<author-notes>
<corresp id="cor1">
<label></label>
Corresponding author
<email>daniel.standage@nbacc.dhs.gov</email>
</corresp>
<corresp id="cor2">
<label>∗∗</label>
Corresponding author
<email>ctbrown@ucdavis.edu</email>
</corresp>
<corresp id="cor3">
<label>∗∗∗</label>
Corresponding author
<email>fhormozd@ucdavis.edu</email>
</corresp>
<fn id="fn1">
<label>5</label>
<p id="ntpara0010">Present address: National Biodefense Analysis and Countermeasures Center, Fort Detrick, MD 21702, USA</p>
</fn>
<fn id="fn2">
<label>6</label>
<p id="ntpara0015">Lead Contact</p>
</fn>
</author-notes>
<pub-date pub-type="pmc-release">
<day>23</day>
<month>7</month>
<year>2019</year>
</pub-date>
<pmc-comment> PMC Release delay is 0 months and 0 days and was based on .</pmc-comment>
<pub-date pub-type="collection">
<day>30</day>
<month>8</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>23</day>
<month>7</month>
<year>2019</year>
</pub-date>
<volume>18</volume>
<fpage>28</fpage>
<lpage>36</lpage>
<history>
<date date-type="received">
<day>11</day>
<month>2</month>
<year>2019</year>
</date>
<date date-type="rev-recd">
<day>24</day>
<month>6</month>
<year>2019</year>
</date>
<date date-type="accepted">
<day>19</day>
<month>7</month>
<year>2019</year>
</date>
</history>
<permissions>
<copyright-statement>© 2019 The Authors</copyright-statement>
<copyright-year>2019</copyright-year>
<license license-type="CC BY-NC-ND" xlink:href="http://creativecommons.org/licenses/by-nc-nd/4.0/">
<license-p>This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).</license-p>
</license>
</permissions>
<abstract id="abs0010">
<title>Summary</title>
<p>
<italic>De novo</italic>
genetic variants are an important source of causative variation in complex genetic disorders. Many methods for variant discovery rely on mapping reads to a reference genome, detecting numerous inherited variants irrelevant to the phenotype of interest. To distinguish between inherited and
<italic>de novo</italic>
variation, sequencing of families (parents and siblings) is commonly pursued. However, standard mapping-based approaches tend to have a high false-discovery rate for
<italic>de novo</italic>
variant prediction. Kevlar is a mapping-free method for
<italic>de novo</italic>
variant discovery, based on direct comparison of sequences between related individuals. Kevlar identifies high-abundance
<italic>k</italic>
-mers unique to the individual of interest. Reads containing these
<italic>k</italic>
-mers are partitioned into disjoint sets by shared
<italic>k</italic>
-mer content for variant calling, and preliminary variant predictions are sorted using a probabilistic score. We evaluated Kevlar on simulated and real datasets, demonstrating its ability to detect both
<italic>de novo</italic>
single-nucleotide variants and indels with high accuracy.</p>
</abstract>
<abstract abstract-type="graphical" id="abs0015">
<title>Graphical Abstract</title>
<fig id="undfig1" position="anchor">
<graphic xlink:href="fx1"></graphic>
</fig>
</abstract>
<abstract abstract-type="author-highlights" id="abs0020">
<title>Highlights</title>
<p>
<list list-type="simple" id="ulist0010">
<list-item id="u0010">
<label></label>
<p id="p0010">Method for discovery of
<italic>de novo</italic>
variants without mapping reads to a reference genome</p>
</list-item>
<list-item id="u0015">
<label></label>
<p id="p0015">Novel probabilistic score for ranking variant predictions as confidently
<italic>de novo</italic>
</p>
</list-item>
<list-item id="u0020">
<label></label>
<p id="p0020">Predicts
<italic>de novo</italic>
SNVs, indels, and structural variants with high accuracy</p>
</list-item>
<list-item id="u0025">
<label></label>
<p id="p0025">Higher accuracy than competing methods for predicting long (>100 bp) variants</p>
</list-item>
</list>
</p>
</abstract>
<abstract abstract-type="teaser" id="abs0025">
<p>Bioinformatics; Biological Sciences; Genetics</p>
</abstract>
<kwd-group id="kwrds0010">
<title>Subject Areas</title>
<kwd>Bioinformatics</kwd>
<kwd>Biological Sciences</kwd>
<kwd>Genetics</kwd>
</kwd-group>
</article-meta>
<notes>
<p id="misc0010">Published: August 30, 2019</p>
</notes>
</front>
</pmc>
</record>

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