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NUFIP and the HSP90/R2TP chaperone bind the SMN complex and facilitate assembly of U4-specific proteins

The Sm proteins are loaded on snRNAs by the SMN complex, but how snRNP-specific proteins are assembled remains poorly characterized. U4 snRNP and box C/D snoRNPs have structural similarities. They both contain the 15.5K and proteins with NOP domains (PRP31 for U4, NOP56/58 for snoRNPs). Biogenesis o...

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Autores principales: Bizarro, Jonathan, Dodré, Maxime, Huttin, Alexandra, Charpentier, Bruno, Schlotter, Florence, Branlant, Christiane, Verheggen, Céline, Massenet, Séverine, Bertrand, Edouard
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2015
Materias:
RNA
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4605303/
https://www.ncbi.nlm.nih.gov/pubmed/26275778
http://dx.doi.org/10.1093/nar/gkv809
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author Bizarro, Jonathan
Dodré, Maxime
Huttin, Alexandra
Charpentier, Bruno
Schlotter, Florence
Branlant, Christiane
Verheggen, Céline
Massenet, Séverine
Bertrand, Edouard
author_facet Bizarro, Jonathan
Dodré, Maxime
Huttin, Alexandra
Charpentier, Bruno
Schlotter, Florence
Branlant, Christiane
Verheggen, Céline
Massenet, Séverine
Bertrand, Edouard
author_sort Bizarro, Jonathan
collection PubMed
description The Sm proteins are loaded on snRNAs by the SMN complex, but how snRNP-specific proteins are assembled remains poorly characterized. U4 snRNP and box C/D snoRNPs have structural similarities. They both contain the 15.5K and proteins with NOP domains (PRP31 for U4, NOP56/58 for snoRNPs). Biogenesis of box C/D snoRNPs involves NUFIP and the HSP90/R2TP chaperone system and here, we explore the function of this machinery in U4 RNP assembly. We show that yeast Prp31 interacts with several components of the NUFIP/R2TP machinery, and that these interactions are separable from each other. In human cells, PRP31 mutants that fail to stably associate with U4 snRNA still interact with components of the NUFIP/R2TP system, indicating that these interactions precede binding of PRP31 to U4 snRNA. Knock-down of NUFIP leads to mislocalization of PRP31 and decreased association with U4. Moreover, NUFIP is associated with the SMN complex through direct interactions with Gemin3 and Gemin6. Altogether, our data suggest a model in which the NUFIP/R2TP system is connected with the SMN complex and facilitates assembly of U4 snRNP-specific proteins.
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spelling pubmed-46053032015-10-19 NUFIP and the HSP90/R2TP chaperone bind the SMN complex and facilitate assembly of U4-specific proteins Bizarro, Jonathan Dodré, Maxime Huttin, Alexandra Charpentier, Bruno Schlotter, Florence Branlant, Christiane Verheggen, Céline Massenet, Séverine Bertrand, Edouard Nucleic Acids Res RNA The Sm proteins are loaded on snRNAs by the SMN complex, but how snRNP-specific proteins are assembled remains poorly characterized. U4 snRNP and box C/D snoRNPs have structural similarities. They both contain the 15.5K and proteins with NOP domains (PRP31 for U4, NOP56/58 for snoRNPs). Biogenesis of box C/D snoRNPs involves NUFIP and the HSP90/R2TP chaperone system and here, we explore the function of this machinery in U4 RNP assembly. We show that yeast Prp31 interacts with several components of the NUFIP/R2TP machinery, and that these interactions are separable from each other. In human cells, PRP31 mutants that fail to stably associate with U4 snRNA still interact with components of the NUFIP/R2TP system, indicating that these interactions precede binding of PRP31 to U4 snRNA. Knock-down of NUFIP leads to mislocalization of PRP31 and decreased association with U4. Moreover, NUFIP is associated with the SMN complex through direct interactions with Gemin3 and Gemin6. Altogether, our data suggest a model in which the NUFIP/R2TP system is connected with the SMN complex and facilitates assembly of U4 snRNP-specific proteins. Oxford University Press 2015-10-15 2015-10-10 /pmc/articles/PMC4605303/ /pubmed/26275778 http://dx.doi.org/10.1093/nar/gkv809 Text en © The Author(s) 2015. Published by Oxford University Press on behalf of Nucleic Acids Research. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle RNA
Bizarro, Jonathan
Dodré, Maxime
Huttin, Alexandra
Charpentier, Bruno
Schlotter, Florence
Branlant, Christiane
Verheggen, Céline
Massenet, Séverine
Bertrand, Edouard
NUFIP and the HSP90/R2TP chaperone bind the SMN complex and facilitate assembly of U4-specific proteins
title NUFIP and the HSP90/R2TP chaperone bind the SMN complex and facilitate assembly of U4-specific proteins
title_full NUFIP and the HSP90/R2TP chaperone bind the SMN complex and facilitate assembly of U4-specific proteins
title_fullStr NUFIP and the HSP90/R2TP chaperone bind the SMN complex and facilitate assembly of U4-specific proteins
title_full_unstemmed NUFIP and the HSP90/R2TP chaperone bind the SMN complex and facilitate assembly of U4-specific proteins
title_short NUFIP and the HSP90/R2TP chaperone bind the SMN complex and facilitate assembly of U4-specific proteins
title_sort nufip and the hsp90/r2tp chaperone bind the smn complex and facilitate assembly of u4-specific proteins
topic RNA
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4605303/
https://www.ncbi.nlm.nih.gov/pubmed/26275778
http://dx.doi.org/10.1093/nar/gkv809
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