Titre
Gene duplication and neofunctionalization: POLR3G and POLR3GL.
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Renaud, M.
Auteure/Auteur
Praz, V.
Auteure/Auteur
Vieu, E.
Auteure/Auteur
Florens, L.
Auteure/Auteur
Washburn, M.P.
Auteure/Auteur
L'hôte, P.
Auteure/Auteur
Hernandez, N.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
1549-5469
Statut éditorial
Publié
Date de publication
2014
Volume
24
Numéro
1
Première page
37
Dernière page/numéro d’article
51
Langue
anglais
Résumé
RNA polymerase III (Pol III) occurs in two versions, one containing the POLR3G subunit and the other the closely related POLR3GL subunit. It is not clear whether these two Pol III forms have the same function, in particular whether they recognize the same target genes. We show that the POLR3G and POLR3GL genes arose from a DNA-based gene duplication, probably in a common ancestor of vertebrates. POLR3G- as well as POLR3GL-containing Pol III are present in cultured cell lines and in normal mouse liver, although the relative amounts of the two forms vary, with the POLR3G-containing Pol III relatively more abundant in dividing cells. Genome-wide chromatin immunoprecipitations followed by high-throughput sequencing (ChIP-seq) reveal that both forms of Pol III occupy the same target genes, in very constant proportions within one cell line, suggesting that the two forms of Pol III have a similar function with regard to specificity for target genes. In contrast, the POLR3G promoter-not the POLR3GL promoter-binds the transcription factor MYC, as do all other promoters of genes encoding Pol III subunits. Thus, the POLR3G/POLR3GL duplication did not lead to neo-functionalization of the gene product (at least with regard to target gene specificity) but rather to neo-functionalization of the transcription units, which acquired different mechanisms of regulation, thus likely affording greater regulation potential to the cell.
PID Serval
serval:BIB_0AEC073C49B3
PMID
Open Access
Oui
Date de création
2014-01-23T07:43:27.040Z
Date de création dans IRIS
2025-05-20T20:30:02Z
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Nom
37.pdf
Version du manuscrit
published
Taille
1.68 MB
Format
Adobe PDF
PID Serval
serval:BIB_0AEC073C49B3.P001
URN
urn:nbn:ch:serval-BIB_0AEC073C49B30
Somme de contrôle
(MD5):c0910091ed0e76926e9769454dbe9d8f