Genome-wide Transcriptional Analysis of Tetrahymena thermophila Response to Exogenous Cholesterol

Autores
Najle, Sebastián Rodrigo; Hernandez, Josefina; Ocaña Pallarès, Eduard; García Siburu, Nicolás Pablo; Nusblat, Alejandro David; Nudel, Berta Clara; Slamovits, Claudio H.; Uttaro, Antonio Domingo
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The ciliate Tetrahymena thermophila does not require sterols for growth and synthesizes pentacyclic triterpenoid alcohols, mainly tetrahymanol, as sterol surrogates. However, when sterols are present in the environment, T. thermophila efficiently incorporates and modifies them. These modifications consist of desaturation reactions at positions C5(6), C7(8), and C22(23), and de-ethylation at C24 of 29-carbon sterols (i.e. phytosterols). Three out of four of the enzymes involved in the sterol modification pathway have been previously identified. However, identification of the sterol C22 desaturase remained elusive, as did other basic aspects of this metabolism. To get more insights into this peculiar metabolism, we here perform a whole transcriptome analysis of T. thermophila in response to exogenous cholesterol. We found 356 T. thermophila genes to be differentially expressed after supplementation with cholesterol for 2 h. Among those that were upregulated, we found two genes belonging to the long spacing family of desaturases that we tentatively identified by RNAi analysis as sterol C22 desaturases. Additionally, we determined that the inhibition of tetrahymanol synthesis after supplementation with cholesterol occurs by a transcriptional downregulation of genes involved in squalene synthesis and cyclization. Finally, we identified several uncharacterized genes that are likely involved in sterols transport and signaling.
Fil: Najle, Sebastián Rodrigo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; Argentina. Universitat Pompeu Fabra; España. Consejo Superior de Investigaciones Científicas; España
Fil: Hernandez, Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; Argentina
Fil: Ocaña Pallarès, Eduard. Universitat Pompeu Fabra; España. Consejo Superior de Investigaciones Científicas; España
Fil: García Siburu, Nicolás Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; Argentina
Fil: Nusblat, Alejandro David. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Nanobiotecnología. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Nanobiotecnología; Argentina
Fil: Nudel, Berta Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Nanobiotecnología. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Nanobiotecnología; Argentina
Fil: Slamovits, Claudio H.. Dalhousie University Halifax; Canadá
Fil: Uttaro, Antonio Domingo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; Argentina
Materia
CILIATE
RNA INTERFERENCE
RNA SEQUENCING
STEROL C22 DESATURASE
STEROLS METABOLISM
TETRAHYMANOL BIOSYNTHESIS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/152434
Acceder
id CONICETDig_c04fcba08eefc7c4866528b158c6d70b
oai_identifier_str oai:ri.conicet.gov.ar:11336/152434
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Genome-wide Transcriptional Analysis of Tetrahymena thermophila Response to Exogenous CholesterolNajle, Sebastián RodrigoHernandez, JosefinaOcaña Pallarès, EduardGarcía Siburu, Nicolás PabloNusblat, Alejandro DavidNudel, Berta ClaraSlamovits, Claudio H.Uttaro, Antonio DomingoCILIATERNA INTERFERENCERNA SEQUENCINGSTEROL C22 DESATURASESTEROLS METABOLISMTETRAHYMANOL BIOSYNTHESIShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The ciliate Tetrahymena thermophila does not require sterols for growth and synthesizes pentacyclic triterpenoid alcohols, mainly tetrahymanol, as sterol surrogates. However, when sterols are present in the environment, T. thermophila efficiently incorporates and modifies them. These modifications consist of desaturation reactions at positions C5(6), C7(8), and C22(23), and de-ethylation at C24 of 29-carbon sterols (i.e. phytosterols). Three out of four of the enzymes involved in the sterol modification pathway have been previously identified. However, identification of the sterol C22 desaturase remained elusive, as did other basic aspects of this metabolism. To get more insights into this peculiar metabolism, we here perform a whole transcriptome analysis of T. thermophila in response to exogenous cholesterol. We found 356 T. thermophila genes to be differentially expressed after supplementation with cholesterol for 2 h. Among those that were upregulated, we found two genes belonging to the long spacing family of desaturases that we tentatively identified by RNAi analysis as sterol C22 desaturases. Additionally, we determined that the inhibition of tetrahymanol synthesis after supplementation with cholesterol occurs by a transcriptional downregulation of genes involved in squalene synthesis and cyclization. Finally, we identified several uncharacterized genes that are likely involved in sterols transport and signaling.Fil: Najle, Sebastián Rodrigo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; Argentina. Universitat Pompeu Fabra; España. Consejo Superior de Investigaciones Científicas; EspañaFil: Hernandez, Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; ArgentinaFil: Ocaña Pallarès, Eduard. Universitat Pompeu Fabra; España. Consejo Superior de Investigaciones Científicas; EspañaFil: García Siburu, Nicolás Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; ArgentinaFil: Nusblat, Alejandro David. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Nanobiotecnología. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Nanobiotecnología; ArgentinaFil: Nudel, Berta Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Nanobiotecnología. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Nanobiotecnología; ArgentinaFil: Slamovits, Claudio H.. Dalhousie University Halifax; CanadáFil: Uttaro, Antonio Domingo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; ArgentinaWiley Blackwell Publishing, Inc2020-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/152434Najle, Sebastián Rodrigo; Hernandez, Josefina; Ocaña Pallarès, Eduard; García Siburu, Nicolás Pablo; Nusblat, Alejandro David; et al.; Genome-wide Transcriptional Analysis of Tetrahymena thermophila Response to Exogenous Cholesterol; Wiley Blackwell Publishing, Inc; Journal of Eukaryotic Microbiology; 67; 2; 3-2020; 209-2221066-5234CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1111/jeu.12774info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1111/jeu.12774info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:15:27Zoai:ri.conicet.gov.ar:11336/152434instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:15:28.169CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Genome-wide Transcriptional Analysis of Tetrahymena thermophila Response to Exogenous Cholesterol
title Genome-wide Transcriptional Analysis of Tetrahymena thermophila Response to Exogenous Cholesterol
spellingShingle Genome-wide Transcriptional Analysis of Tetrahymena thermophila Response to Exogenous Cholesterol
Najle, Sebastián Rodrigo
CILIATE
RNA INTERFERENCE
RNA SEQUENCING
STEROL C22 DESATURASE
STEROLS METABOLISM
TETRAHYMANOL BIOSYNTHESIS
title_short Genome-wide Transcriptional Analysis of Tetrahymena thermophila Response to Exogenous Cholesterol
title_full Genome-wide Transcriptional Analysis of Tetrahymena thermophila Response to Exogenous Cholesterol
title_fullStr Genome-wide Transcriptional Analysis of Tetrahymena thermophila Response to Exogenous Cholesterol
title_full_unstemmed Genome-wide Transcriptional Analysis of Tetrahymena thermophila Response to Exogenous Cholesterol
title_sort Genome-wide Transcriptional Analysis of Tetrahymena thermophila Response to Exogenous Cholesterol
dc.creator.none.fl_str_mv Najle, Sebastián Rodrigo
Hernandez, Josefina
Ocaña Pallarès, Eduard
García Siburu, Nicolás Pablo
Nusblat, Alejandro David
Nudel, Berta Clara
Slamovits, Claudio H.
Uttaro, Antonio Domingo
author Najle, Sebastián Rodrigo
author_facet Najle, Sebastián Rodrigo
Hernandez, Josefina
Ocaña Pallarès, Eduard
García Siburu, Nicolás Pablo
Nusblat, Alejandro David
Nudel, Berta Clara
Slamovits, Claudio H.
Uttaro, Antonio Domingo
author_role author
author2 Hernandez, Josefina
Ocaña Pallarès, Eduard
García Siburu, Nicolás Pablo
Nusblat, Alejandro David
Nudel, Berta Clara
Slamovits, Claudio H.
Uttaro, Antonio Domingo
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv CILIATE
RNA INTERFERENCE
RNA SEQUENCING
STEROL C22 DESATURASE
STEROLS METABOLISM
TETRAHYMANOL BIOSYNTHESIS
topic CILIATE
RNA INTERFERENCE
RNA SEQUENCING
STEROL C22 DESATURASE
STEROLS METABOLISM
TETRAHYMANOL BIOSYNTHESIS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The ciliate Tetrahymena thermophila does not require sterols for growth and synthesizes pentacyclic triterpenoid alcohols, mainly tetrahymanol, as sterol surrogates. However, when sterols are present in the environment, T. thermophila efficiently incorporates and modifies them. These modifications consist of desaturation reactions at positions C5(6), C7(8), and C22(23), and de-ethylation at C24 of 29-carbon sterols (i.e. phytosterols). Three out of four of the enzymes involved in the sterol modification pathway have been previously identified. However, identification of the sterol C22 desaturase remained elusive, as did other basic aspects of this metabolism. To get more insights into this peculiar metabolism, we here perform a whole transcriptome analysis of T. thermophila in response to exogenous cholesterol. We found 356 T. thermophila genes to be differentially expressed after supplementation with cholesterol for 2 h. Among those that were upregulated, we found two genes belonging to the long spacing family of desaturases that we tentatively identified by RNAi analysis as sterol C22 desaturases. Additionally, we determined that the inhibition of tetrahymanol synthesis after supplementation with cholesterol occurs by a transcriptional downregulation of genes involved in squalene synthesis and cyclization. Finally, we identified several uncharacterized genes that are likely involved in sterols transport and signaling.
Fil: Najle, Sebastián Rodrigo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; Argentina. Universitat Pompeu Fabra; España. Consejo Superior de Investigaciones Científicas; España
Fil: Hernandez, Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; Argentina
Fil: Ocaña Pallarès, Eduard. Universitat Pompeu Fabra; España. Consejo Superior de Investigaciones Científicas; España
Fil: García Siburu, Nicolás Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; Argentina
Fil: Nusblat, Alejandro David. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Nanobiotecnología. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Nanobiotecnología; Argentina
Fil: Nudel, Berta Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Nanobiotecnología. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Nanobiotecnología; Argentina
Fil: Slamovits, Claudio H.. Dalhousie University Halifax; Canadá
Fil: Uttaro, Antonio Domingo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; Argentina
description The ciliate Tetrahymena thermophila does not require sterols for growth and synthesizes pentacyclic triterpenoid alcohols, mainly tetrahymanol, as sterol surrogates. However, when sterols are present in the environment, T. thermophila efficiently incorporates and modifies them. These modifications consist of desaturation reactions at positions C5(6), C7(8), and C22(23), and de-ethylation at C24 of 29-carbon sterols (i.e. phytosterols). Three out of four of the enzymes involved in the sterol modification pathway have been previously identified. However, identification of the sterol C22 desaturase remained elusive, as did other basic aspects of this metabolism. To get more insights into this peculiar metabolism, we here perform a whole transcriptome analysis of T. thermophila in response to exogenous cholesterol. We found 356 T. thermophila genes to be differentially expressed after supplementation with cholesterol for 2 h. Among those that were upregulated, we found two genes belonging to the long spacing family of desaturases that we tentatively identified by RNAi analysis as sterol C22 desaturases. Additionally, we determined that the inhibition of tetrahymanol synthesis after supplementation with cholesterol occurs by a transcriptional downregulation of genes involved in squalene synthesis and cyclization. Finally, we identified several uncharacterized genes that are likely involved in sterols transport and signaling.
publishDate 2020
dc.date.none.fl_str_mv 2020-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/152434
Najle, Sebastián Rodrigo; Hernandez, Josefina; Ocaña Pallarès, Eduard; García Siburu, Nicolás Pablo; Nusblat, Alejandro David; et al.; Genome-wide Transcriptional Analysis of Tetrahymena thermophila Response to Exogenous Cholesterol; Wiley Blackwell Publishing, Inc; Journal of Eukaryotic Microbiology; 67; 2; 3-2020; 209-222
1066-5234
CONICET Digital
CONICET
url http://hdl.handle.net/11336/152434
identifier_str_mv Najle, Sebastián Rodrigo; Hernandez, Josefina; Ocaña Pallarès, Eduard; García Siburu, Nicolás Pablo; Nusblat, Alejandro David; et al.; Genome-wide Transcriptional Analysis of Tetrahymena thermophila Response to Exogenous Cholesterol; Wiley Blackwell Publishing, Inc; Journal of Eukaryotic Microbiology; 67; 2; 3-2020; 209-222
1066-5234
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/jeu.12774
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1111/jeu.12774
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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