Fungal virulence and development is regulated by alternative pre-mRNA 3'end processing in Magnaporthe oryzae.
RNA-binding proteins play a central role in post-transcriptional mechanisms that control gene expression. Identification of novel RNA-binding proteins in fungi is essential to unravel post-transcriptional networks and cellular processes that confer identity to the fungal kingdom. Here, we carried ou...
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2011-12-01
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| Series: | PLoS Pathogens |
| Online Access: | https://journals.plos.org/plospathogens/article/file?id=10.1371/journal.ppat.1002441&type=printable |
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| author | Marina Franceschetti Emilio Bueno Richard A Wilson Sara L Tucker Concepción Gómez-Mena Grant Calder Ane Sesma |
| author_facet | Marina Franceschetti Emilio Bueno Richard A Wilson Sara L Tucker Concepción Gómez-Mena Grant Calder Ane Sesma |
| author_sort | Marina Franceschetti |
| collection | DOAJ |
| description | RNA-binding proteins play a central role in post-transcriptional mechanisms that control gene expression. Identification of novel RNA-binding proteins in fungi is essential to unravel post-transcriptional networks and cellular processes that confer identity to the fungal kingdom. Here, we carried out the functional characterisation of the filamentous fungus-specific RNA-binding protein RBP35 required for full virulence and development in the rice blast fungus. RBP35 contains an N-terminal RNA recognition motif (RRM) and six Arg-Gly-Gly tripeptide repeats. Immunoblots identified two RBP35 protein isoforms that show a steady-state nuclear localisation and bind RNA in vitro. RBP35 coimmunoprecipitates in vivo with Cleavage Factor I (CFI) 25 kDa, a highly conserved protein involved in polyA site recognition and cleavage of pre-mRNAs. Several targets of RBP35 have been identified using transcriptomics including 14-3-3 pre-mRNA, an important integrator of environmental signals. In Magnaporthe oryzae, RBP35 is not essential for viability but regulates the length of 3'UTRs of transcripts with developmental and virulence-associated functions. The Δrbp35 mutant is affected in the TOR (target of rapamycin) signaling pathway showing significant changes in nitrogen metabolism and protein secretion. The lack of clear RBP35 orthologues in yeast, plants and animals indicates that RBP35 is a novel auxiliary protein of the polyadenylation machinery of filamentous fungi. Our data demonstrate that RBP35 is the fungal equivalent of metazoan CFI 68 kDa and suggest the existence of 3'end processing mechanisms exclusive to the fungal kingdom. |
| format | Article |
| id | doaj-art-39694424c8fe4cf8978d300b437c6cf8 |
| institution | Kabale University |
| issn | 1553-7366 1553-7374 |
| language | English |
| publishDate | 2011-12-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS Pathogens |
| spelling | doaj-art-39694424c8fe4cf8978d300b437c6cf82025-08-20T03:26:47ZengPublic Library of Science (PLoS)PLoS Pathogens1553-73661553-73742011-12-01712e100244110.1371/journal.ppat.1002441Fungal virulence and development is regulated by alternative pre-mRNA 3'end processing in Magnaporthe oryzae.Marina FranceschettiEmilio BuenoRichard A WilsonSara L TuckerConcepción Gómez-MenaGrant CalderAne SesmaRNA-binding proteins play a central role in post-transcriptional mechanisms that control gene expression. Identification of novel RNA-binding proteins in fungi is essential to unravel post-transcriptional networks and cellular processes that confer identity to the fungal kingdom. Here, we carried out the functional characterisation of the filamentous fungus-specific RNA-binding protein RBP35 required for full virulence and development in the rice blast fungus. RBP35 contains an N-terminal RNA recognition motif (RRM) and six Arg-Gly-Gly tripeptide repeats. Immunoblots identified two RBP35 protein isoforms that show a steady-state nuclear localisation and bind RNA in vitro. RBP35 coimmunoprecipitates in vivo with Cleavage Factor I (CFI) 25 kDa, a highly conserved protein involved in polyA site recognition and cleavage of pre-mRNAs. Several targets of RBP35 have been identified using transcriptomics including 14-3-3 pre-mRNA, an important integrator of environmental signals. In Magnaporthe oryzae, RBP35 is not essential for viability but regulates the length of 3'UTRs of transcripts with developmental and virulence-associated functions. The Δrbp35 mutant is affected in the TOR (target of rapamycin) signaling pathway showing significant changes in nitrogen metabolism and protein secretion. The lack of clear RBP35 orthologues in yeast, plants and animals indicates that RBP35 is a novel auxiliary protein of the polyadenylation machinery of filamentous fungi. Our data demonstrate that RBP35 is the fungal equivalent of metazoan CFI 68 kDa and suggest the existence of 3'end processing mechanisms exclusive to the fungal kingdom.https://journals.plos.org/plospathogens/article/file?id=10.1371/journal.ppat.1002441&type=printable |
| spellingShingle | Marina Franceschetti Emilio Bueno Richard A Wilson Sara L Tucker Concepción Gómez-Mena Grant Calder Ane Sesma Fungal virulence and development is regulated by alternative pre-mRNA 3'end processing in Magnaporthe oryzae. PLoS Pathogens |
| title | Fungal virulence and development is regulated by alternative pre-mRNA 3'end processing in Magnaporthe oryzae. |
| title_full | Fungal virulence and development is regulated by alternative pre-mRNA 3'end processing in Magnaporthe oryzae. |
| title_fullStr | Fungal virulence and development is regulated by alternative pre-mRNA 3'end processing in Magnaporthe oryzae. |
| title_full_unstemmed | Fungal virulence and development is regulated by alternative pre-mRNA 3'end processing in Magnaporthe oryzae. |
| title_short | Fungal virulence and development is regulated by alternative pre-mRNA 3'end processing in Magnaporthe oryzae. |
| title_sort | fungal virulence and development is regulated by alternative pre mrna 3 end processing in magnaporthe oryzae |
| url | https://journals.plos.org/plospathogens/article/file?id=10.1371/journal.ppat.1002441&type=printable |
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