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Ab initio detection of fuzzy amino acid tandem repeats in protein sequences

Identifieur interne : 000327 ( Pmc/Curation ); précédent : 000326; suivant : 000328

Ab initio detection of fuzzy amino acid tandem repeats in protein sequences

Auteurs : Marco Pellegrini [Italie] ; Maria Elena Renda [Italie] ; Alessio Vecchio [Italie]

Source :

RBID : PMC:3402919

Abstract

Background

Tandem repetitions within protein amino acid sequences often correspond to regular secondary structures and form multi-repeat 3D assemblies of varied size and function. Developing internal repetitions is one of the evolutionary mechanisms that proteins employ to adapt their structure and function under evolutionary pressure. While there is keen interest in understanding such phenomena, detection of repeating structures based only on sequence analysis is considered an arduous task, since structure and function is often preserved even under considerable sequence divergence (fuzzy tandem repeats).

Results

In this paper we present PTRStalker, a new algorithm for ab-initio detection of fuzzy tandem repeats in protein amino acid sequences. In the reported results we show that by feeding PTRStalker with amino acid sequences from the UniProtKB/Swiss-Prot database we detect novel tandemly repeated structures not captured by other state-of-the-art tools. Experiments with membrane proteins indicate that PTRStalker can detect global symmetries in the primary structure which are then reflected in the tertiary structure.

Conclusions

PTRStalker is able to detect fuzzy tandem repeating structures in protein sequences, with performance beyond the current state-of-the art. Such a tool may be a valuable support to investigating protein structural properties when tertiary X-ray data is not available.


Url:
DOI: 10.1186/1471-2105-13-S3-S8
PubMed: 22536906
PubMed Central: 3402919

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PMC:3402919

Le document en format XML

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<p>In this paper we present
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<title-group>
<article-title>Ab initio detection of fuzzy amino acid tandem repeats in protein sequences</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author" corresp="yes" id="A1">
<name>
<surname>Pellegrini</surname>
<given-names>Marco</given-names>
</name>
<xref ref-type="aff" rid="I1">1</xref>
<email>marco.pellegrini@iit.cnr.it</email>
</contrib>
<contrib contrib-type="author" id="A2">
<name>
<surname>Renda</surname>
<given-names>Maria Elena</given-names>
</name>
<xref ref-type="aff" rid="I1">1</xref>
<email>elena.renda@iit.cnr.it</email>
</contrib>
<contrib contrib-type="author" id="A3">
<name>
<surname>Vecchio</surname>
<given-names>Alessio</given-names>
</name>
<xref ref-type="aff" rid="I2">2</xref>
<email>a.vecchio@ing.unipi.it</email>
</contrib>
</contrib-group>
<aff id="I1">
<label>1</label>
Istituto di Informatica e Telematica, CNR - Consiglio Nazionale delle Ricerche, Pisa I-56124, Italy</aff>
<aff id="I2">
<label>2</label>
Dipartimento di Ingegneria dell'Informazione, Università di Pisa, Pisa I-56122, Italy</aff>
<pub-date pub-type="collection">
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>21</day>
<month>3</month>
<year>2012</year>
</pub-date>
<volume>13</volume>
<issue>Suppl 3</issue>
<supplement>
<named-content content-type="supplement-title">ACM Conference on Bioinformatics, Computational Biology and Biomedicine 2011</named-content>
<named-content content-type="supplement-editor">Sun Kim and Wei Wang</named-content>
<named-content content-type="supplement-sponsor">Publication of this supplement has been supported by NSF support number NSF IIS1137427: III: Small: Women in Bioinformatics Initiative at ACM-BCB 2011.</named-content>
</supplement>
<fpage>S8</fpage>
<lpage>S8</lpage>
<permissions>
<copyright-statement>Copyright ©2012 Pellegrini et al.; licensee BioMed Central Ltd.</copyright-statement>
<copyright-year>2012</copyright-year>
<copyright-holder>Pellegrini et al.; licensee BioMed Central Ltd.</copyright-holder>
<license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/2.0">
<license-p>This is an open access article distributed under the terms of the Creative Commons Attribution License (
<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/2.0">http://creativecommons.org/licenses/by/2.0</ext-link>
), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p>
</license>
</permissions>
<self-uri xlink:href="http://www.biomedcentral.com/1471-2105/13/S3/S8"></self-uri>
<abstract>
<sec>
<title>Background</title>
<p>Tandem repetitions within protein amino acid sequences often correspond to regular secondary structures and form multi-repeat 3D assemblies of varied size and function. Developing internal repetitions is one of the evolutionary mechanisms that proteins employ to adapt their structure and function under evolutionary pressure. While there is keen interest in understanding such phenomena, detection of repeating structures based only on sequence analysis is considered an arduous task, since structure and function is often preserved even under considerable sequence divergence (
<italic>fuzzy tandem repeats</italic>
).</p>
</sec>
<sec>
<title>Results</title>
<p>In this paper we present
<italic>PTRStalker</italic>
, a new algorithm for
<italic>ab-initio </italic>
detection of
<italic>fuzzy tandem repeats </italic>
in protein amino acid sequences. In the reported results we show that by feeding
<italic>PTRStalker </italic>
with amino acid sequences from the UniProtKB/Swiss-Prot database we detect novel tandemly repeated structures not captured by other state-of-the-art tools. Experiments with membrane proteins indicate that
<italic>PTRStalker </italic>
can detect global symmetries in the primary structure which are then reflected in the tertiary structure.</p>
</sec>
<sec>
<title>Conclusions</title>
<p>
<italic>PTRStalker </italic>
is able to detect fuzzy tandem repeating structures in protein sequences, with performance beyond the current state-of-the art. Such a tool may be a valuable support to investigating protein structural properties when tertiary X-ray data is not available.</p>
</sec>
</abstract>
<conference>
<conf-date>1-3 August 2011</conf-date>
<conf-name>ACM Conference on Bioinformatics, Computational Biology and Biomedicine 2011 (ACM-BCB)</conf-name>
<conf-loc>Chicago, IL, USA</conf-loc>
</conference>
</article-meta>
</front>
</pmc>
</record>

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