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Key Role of Amino Acid Repeat Expansions in the Functional Diversification of Duplicated Transcription Factors.

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dc.contributor.author Radó i Trilla, Núria, 1985-
dc.contributor.author Arató, Krisztina, 1981-
dc.contributor.author Pegueroles Queralt, Maria Cinta
dc.contributor.author Raya, Alicia
dc.contributor.author Luna, Susana de la
dc.contributor.author Albà Soler, Mar
dc.date.accessioned 2015-09-03T11:15:18Z
dc.date.available 2015-09-03T11:15:18Z
dc.date.issued 2015
dc.identifier.citation Radó-Trilla N, Arató K, Pegueroles C, Raya A, de la Luna S, Albà MM. Key Role of Amino Acid Repeat Expansions in the Functional Diversification of Duplicated Transcription Factors. Mol Biol Evol. 2015 Sep;32(9):2263-72. DOI: 10.1093/molbev/msv103.
dc.identifier.issn 0737-4038
dc.identifier.uri http://hdl.handle.net/10230/24731
dc.description.abstract The high regulatory complexity of vertebrates has been related to two rounds of whole genome duplication (2R-WGD) that occurred before the divergence of the major vertebrate groups. Following these events, many developmental transcription factors (TFs) were retained in multiple copies and subsequently specialized in diverse functions, whereas others reverted to their singleton state. TFs are known to be generally rich in amino acid repeats or low-complexity regions (LCRs), such as polyalanine or polyglutamine runs, which can evolve rapidly and potentially influence the transcriptional activity of the protein. Here we test the hypothesis that LCRs have played a major role in the diversification of TF gene duplicates. We find that nearly half of the TF gene families originated during the 2R-WGD contains LCRs. The number of gene duplicates with LCRs is 155 out of 550 analyzed (28%), about twice as many as the number of single copy genes with LCRs (15 out of 115, 13%). In addition, duplicated TFs preferentially accumulate certain LCR types, the most prominent of which are alanine repeats. We experimentally test the role of alanine-rich LCRs in two different TF gene families, PHOX2A/PHOX2B and LHX2/LHX9. In both cases, the presence of the alanine-rich LCR in one of the copies (PHOX2B and LHX2) significantly increases the capacity of the TF to activate transcription. Taken together, the results provide strong evidence that LCRs are important driving forces of evolutionary change in duplicated genes.
dc.description.sponsorship The work was supported by grants from the Ministerio de Innovacion y Tecnolog ıa (BIO2009-08160 to M.M.A.), Ministerio de Economıa y Competitividad (BFU2012-36820 co-funded by FEDER to M.M.A. and BFU2010-15347 and Centro de Excelencia Severo Ochoa 2013-2017-SEV-2012- 0208 to S.L.), the Secretariat of Universities and ResearchGovernment of Catalonia (2014SGR1121 to M.M.A. and 2014SGR674 to S.L.), Fundacio Javier Lamas Miralles (fellow- ship to N.R-T.), and Institucio Catalana de Recerca i Estudis Avanc¸ats (ICREA contract to M.M.A. and S.L.).
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher Open University Press
dc.relation.ispartof Molecular Biology and Evolution. 2015 Sep;32(9):2263-72
dc.rights The Author 2015. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com
dc.rights.uri http://creativecommons.org/licenses/by-nc/4.0/
dc.subject.other Aminoàcids
dc.subject.other Gens humans
dc.title Key Role of Amino Acid Repeat Expansions in the Functional Diversification of Duplicated Transcription Factors.
dc.type info:eu-repo/semantics/article
dc.identifier.doi http://dx.doi.org/10.1093/molbev/msv103
dc.relation.projectID info:eu-repo/grantAgreement/ES/3PN/BIO2009-08160
dc.relation.projectID info:eu-repo/grantAgreement/ES/3PN/BFU2012-36820
dc.relation.projectID info:eu-repo/grantAgreement/ES/3PN/BFU2010-15347
dc.relation.projectID info:eu-repo/grantAgreement/ES/3PN/SEV2012-0208
dc.rights.accessRights info:eu-repo/semantics/openAccess
dc.type.version info:eu-repo/semantics/publishedVersion

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