A bona fide La protein is required for embryogenesis in Arabidopsis thaliana.
Searches in the Arabidopsis thaliana genome using the La motif as query revealed the presence of eight La or La-like proteins. Using structural and phylogenetic criteria, we identified two putative genuine La proteins (At32 and At79) and showed that both are expressed throughout plant development bu...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
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2007
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| _version_ | 1797090879541870592 |
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| author | Fleurdépine, S Deragon, J Devic, M Guilleminot, J Bousquet-Antonelli, C |
| author_facet | Fleurdépine, S Deragon, J Devic, M Guilleminot, J Bousquet-Antonelli, C |
| author_sort | Fleurdépine, S |
| collection | OXFORD |
| description | Searches in the Arabidopsis thaliana genome using the La motif as query revealed the presence of eight La or La-like proteins. Using structural and phylogenetic criteria, we identified two putative genuine La proteins (At32 and At79) and showed that both are expressed throughout plant development but at different levels and under different regulatory conditions. At32, but not At79, restores Saccharomyces cerevisiae La nuclear functions in non-coding RNAs biogenesis and is able to bind to plant 3'-UUU-OH RNAs. We conclude that these La nuclear functions are conserved in Arabidopsis and supported by At32, which we renamed as AtLa1. Consistently, AtLa1 is predominantly localized to the plant nucleoplasm and was also detected in the nucleolar cavity. The inactivation of AtLa1 in Arabidopsis leads to an embryonic-lethal phenotype with deficient embryos arrested at early globular stage of development. In addition, mutant embryonic cells display a nucleolar hypertrophy suggesting that AtLa1 is required for normal ribosome biogenesis. The identification of two distantly related proteins with all structural characteristics of genuine La proteins suggests that these factors evolved to a certain level of specialization in plants. This unprecedented situation provides a unique opportunity to dissect the very different aspects of this crucial cellular activity. |
| first_indexed | 2024-03-07T03:25:03Z |
| format | Journal article |
| id | oxford-uuid:b8c0f170-a4d7-4124-a790-c3b1a7e154eb |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:25:03Z |
| publishDate | 2007 |
| record_format | dspace |
| spelling | oxford-uuid:b8c0f170-a4d7-4124-a790-c3b1a7e154eb2022-03-27T04:58:06ZA bona fide La protein is required for embryogenesis in Arabidopsis thaliana.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b8c0f170-a4d7-4124-a790-c3b1a7e154ebEnglishSymplectic Elements at Oxford2007Fleurdépine, SDeragon, JDevic, MGuilleminot, JBousquet-Antonelli, CSearches in the Arabidopsis thaliana genome using the La motif as query revealed the presence of eight La or La-like proteins. Using structural and phylogenetic criteria, we identified two putative genuine La proteins (At32 and At79) and showed that both are expressed throughout plant development but at different levels and under different regulatory conditions. At32, but not At79, restores Saccharomyces cerevisiae La nuclear functions in non-coding RNAs biogenesis and is able to bind to plant 3'-UUU-OH RNAs. We conclude that these La nuclear functions are conserved in Arabidopsis and supported by At32, which we renamed as AtLa1. Consistently, AtLa1 is predominantly localized to the plant nucleoplasm and was also detected in the nucleolar cavity. The inactivation of AtLa1 in Arabidopsis leads to an embryonic-lethal phenotype with deficient embryos arrested at early globular stage of development. In addition, mutant embryonic cells display a nucleolar hypertrophy suggesting that AtLa1 is required for normal ribosome biogenesis. The identification of two distantly related proteins with all structural characteristics of genuine La proteins suggests that these factors evolved to a certain level of specialization in plants. This unprecedented situation provides a unique opportunity to dissect the very different aspects of this crucial cellular activity. |
| spellingShingle | Fleurdépine, S Deragon, J Devic, M Guilleminot, J Bousquet-Antonelli, C A bona fide La protein is required for embryogenesis in Arabidopsis thaliana. |
| title | A bona fide La protein is required for embryogenesis in Arabidopsis thaliana. |
| title_full | A bona fide La protein is required for embryogenesis in Arabidopsis thaliana. |
| title_fullStr | A bona fide La protein is required for embryogenesis in Arabidopsis thaliana. |
| title_full_unstemmed | A bona fide La protein is required for embryogenesis in Arabidopsis thaliana. |
| title_short | A bona fide La protein is required for embryogenesis in Arabidopsis thaliana. |
| title_sort | bona fide la protein is required for embryogenesis in arabidopsis thaliana |
| work_keys_str_mv | AT fleurdepines abonafidelaproteinisrequiredforembryogenesisinarabidopsisthaliana AT deragonj abonafidelaproteinisrequiredforembryogenesisinarabidopsisthaliana AT devicm abonafidelaproteinisrequiredforembryogenesisinarabidopsisthaliana AT guilleminotj abonafidelaproteinisrequiredforembryogenesisinarabidopsisthaliana AT bousquetantonellic abonafidelaproteinisrequiredforembryogenesisinarabidopsisthaliana AT fleurdepines bonafidelaproteinisrequiredforembryogenesisinarabidopsisthaliana AT deragonj bonafidelaproteinisrequiredforembryogenesisinarabidopsisthaliana AT devicm bonafidelaproteinisrequiredforembryogenesisinarabidopsisthaliana AT guilleminotj bonafidelaproteinisrequiredforembryogenesisinarabidopsisthaliana AT bousquetantonellic bonafidelaproteinisrequiredforembryogenesisinarabidopsisthaliana |