Distinct roles of non-canonical poly(A) polymerases in RNA metabolism

SAN PAOLO, Salvatore, Štěpánka VAŇÁČOVÁ, L. SCHENK, T. SCHERRER, Diana BLANK, Walter KELLER a Andre P. GERBER. Distinct roles of non-canonical poly(A) polymerases in RNA metabolism. PLoS Genetics. Public Library of Science, 2009, roč. 5, č. 7, s. e1000555, 17 s. ISSN 1553-7390.

Základní údaje

• Originální název: Distinct roles of non-canonical poly(A) polymerases in RNA metabolism
• Název česky: Distinct roles of non-canonical poly(A) polymerases in RNA metabolism
• Autoři: SAN PAOLO, Salvatore (380 Itálie), Štěpánka VAŇÁČOVÁ (203 Česká republika, garant), L. SCHENK (756 Švýcarsko), T. SCHERRER (756 Švýcarsko), Diana BLANK (756 Švýcarsko), Walter KELLER (276 Německo) a Andre P. GERBER (756 Švýcarsko).
• Vydání: PLoS Genetics, Public Library of Science, 2009, 1553-7390.

Další údaje

• Originální jazyk: angličtina
• Typ výsledku: Článek v odborném periodiku
• Obor: Genetika a molekulární biologie
• Stát vydavatele: Spojené státy
• Utajení: není předmětem státního či obchodního tajemství
• WWW: URL
• Impakt faktor: Impact factor: 9.532
• Kód RIV: RIV/00216224:14310/09:00036231
• Organizační jednotka: Přírodovědecká fakulta
• UT WoS: 000269219500032
• Klíčová slova česky: TRAMP; polyadenylation; RNA degradation; RNA quality control; Trf4; Trf5
• Klíčová slova anglicky: TRAMP; polyadenylation; RNA degradation; RNA quality control; Trf4; Trf5
• Štítky: polyadenylation, RNA degradation, RNA quality control, TRAMP, Trf4, Trf5
• Příznaky: Mezinárodní význam, Recenzováno

Anotace

Trf4p and Trf5p are non canonical poly(A) polymerases and are part of the heteromeric protein complexes TRAMP4 and TRAMP5 that promote the degradation of aberrant and short lived RNA substrates by interacting with the nuclear exosome. To assess the level of functional redundancy between the paralogous Trf4 and Trf5 proteins and to investigate the role of the Trf4 dependent polyadenylation in vivo, we used DNA microarrays to compare gene expression of the wild-type yeast strain of S. cerevisiae with either that of trf4delta or trf5delta mutant strains or the trf4delta mutant expressing the polyadenylation-defective Trf4(DADA) protein. We found little overlap between the sets of transcripts with altered expression in the trf4delta or the trf5delta mutants, suggesting that Trf4p and Trf5p target distinct groups of RNAs for degradation. Surprisingly, most RNAs the expression of which was altered by the trf4 deletion were restored to wild type levels by overexpression of TRF4(DADA), showing that the polyadenylation activity of Trf4p is dispensable in vivo. Apart from previously reported Trf4p and Trf5p target RNAs, this analysis along with in vivo cross-linking and RNA immunopurification chip experiments revealed that both the TRAMP4 and the TRAMP5 complexes stimulate the degradation of spliced out introns via a mechanism that is independent of the polyadenylation activity of Trf4p. In addition, we show that disruption of trf4 causes severe shortening of telomeres suggesting that TRF4 functions in the maintenance of telomere length. Finally, our study demonstrates that TRF4, the exosome, and TRF5 participate in antisense RNA mediated regulation of genes involved in phosphate metabolism. In conclusion, our results suggest that paralogous TRAMP complexes have distinct RNA selectivities with functional implications in RNA surveillance as well as other RNA related processes. This indicates widespread and integrative functions of TRAMP complexes for the coordination of different gene expression regulatory processes.

Anotace česky

Trf4p and Trf5p are non canonical poly(A) polymerases and are part of the heteromeric protein complexes TRAMP4 and TRAMP5 that promote the degradation of aberrant and short lived RNA substrates by interacting with the nuclear exosome. To assess the level of functional redundancy between the paralogous Trf4 and Trf5 proteins and to investigate the role of the Trf4 dependent polyadenylation in vivo, we used DNA microarrays to compare gene expression of the wild-type yeast strain of S. cerevisiae with either that of trf4delta or trf5delta mutant strains or the trf4delta mutant expressing the polyadenylation-defective Trf4(DADA) protein. We found little overlap between the sets of transcripts with altered expression in the trf4delta or the trf5delta mutants, suggesting that Trf4p and Trf5p target distinct groups of RNAs for degradation. Surprisingly, most RNAs the expression of which was altered by the trf4 deletion were restored to wild type levels by overexpression of TRF4(DADA), showing that the polyadenylation activity of Trf4p is dispensable in vivo. Apart from previously reported Trf4p and Trf5p target RNAs, this analysis along with in vivo cross-linking and RNA immunopurification chip experiments revealed that both the TRAMP4 and the TRAMP5 complexes stimulate the degradation of spliced out introns via a mechanism that is independent of the polyadenylation activity of Trf4p. In addition, we show that disruption of trf4 causes severe shortening of telomeres suggesting that TRF4 functions in the maintenance of telomere length. Finally, our study demonstrates that TRF4, the exosome, and TRF5 participate in antisense RNA mediated regulation of genes involved in phosphate metabolism. In conclusion, our results suggest that paralogous TRAMP complexes have distinct RNA selectivities with functional implications in RNA surveillance as well as other RNA related processes. This indicates widespread and integrative functions of TRAMP complexes for the coordination of different gene expression regulatory processes.

Návaznosti

• MSM0021622413, záměr: Název: Proteiny v metabolismu a při interakci organismů s prostředím

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Proteiny v metabolismu a při interakci organismů s prostředím