Characterization of TcCAL1: A calcium binding protein and its role in the life cycle of Trypanosoma cruzi

Autores
Rodríguez Durán, Jessica Jenireth; Gomez, Karina Andrea; Potenza, Mariana
Año de publicación
2022
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
In Trypanosoma cruzi, several studies have reported that intracellular calcium (iCa2+) levels increase duringmetacyclogenesis and parasite adhesion to host cells. Also, channels that generate variations in iCa2+ concentrationhave been studied. However, most of the proteins that interact with this ion, possibly decodingits signals, have not been characterized. TcCAL1 is a 103 amino acid protein with EF-hand type domainsfor Ca2+ binding, with no known function and specific to kinetoplastids. In this work, we studied the roleof TcCAL1 in some aspects of the parasite life cycle. By western blot, it was demonstrated that TcCAL1is more abundantly expressed in the trypomastigote forms, compared to the amastigote and epimastigotestages. Through immunofluorescence microscopy, it was determined that TcCAL1 is localized throughout thecell body of the three stages mentioned. Also, cultures overexpressing TcCAL1 fused to a six-histidine tag(pTREX/TcCAL1x6His) and cultures containing the empty pTREX vector (controls) were obtained. In metacyclogeneticassays, overexpression of TcCAL1x6His significantly decreased the percentages of differentiationfrom epimastigote to metacyclic trypomastigote forms. When invasion processes were evaluated, overexpressionof TcCAL1x6His caused an increase in the adhesion percentages of metacyclic trypomastigotes to the surfaceof Vero cells, as well as the number of parasites attached per cell. Similarly, the percentages of infected Verocells and the number of intracellular amastigotes per cell increased in cultures overexpressing TcCAL1x6His.However, parasites overexpressing TcCAL1x6His showed similar epimastigote proliferation rates to controls,as well as differentiation of metacyclic trypomastigotes to axenic amastigotes. On the other hand, a yeasttwo-hybrid assay was performed expressing TcCAL1 as bait in conjunction with a T. cruzi cDNA library.As a result, two TcCAL1-interacting proteins were identified, with characteristic armadillo-like or prefoldinlikedomains, respectively. Such interactions were studied by co-immunoprecipitation and mass spectrometry,where a protein with prefoldin domains was also identified. However, no proteins with armadillo domainswere detected. Co-localization by immunofluorescence microscopy of epimastigotes expressing a fragment ofthe armadillo domain protein fused to an HA tag was evaluated using anti-HA and anti-TcCAL1 antibodies.As a result, signal intensity overlap was observed for both antibodies. These results allow us to hypothesizethat TcCAL1x6His limits iCa2+ concentration in the parasite, negatively affecting metacyclogenesis. Also, wepropose that overexpression of TcCAL1x6His promotes the invasiveness of T. cruzi to host cells by activatingsome Ca2+-dependent function. Future studies aim to determine Ca2+ binding to TcCAL1 and to quantifyiCa2+ levels in parasites overexpressing TcCAL1x6His against different components of the extracellular matrix.This study reaffirms the importance of studying uncharacterized proteins exclusive to the parasite to deepenour knowledge of T. cruzi biology.
Fil: Rodríguez Durán, Jessica Jenireth. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; Argentina
Fil: Gomez, Karina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; Argentina
Fil: Potenza, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; Argentina
IX Curso Internacional de Biologia Molecular de Tripanosomatidos; IX Simposio de Biologia Molecular de Enfermedad de Chagas
Medellín
Colombia
Universidad de Antioquía
Materia
TRYPANOSOMA CRUZI
CALCIUM BINDING PROTEIN
HOST CELL-INVASION
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:11336/240696

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network_name_str CONICET Digital (CONICET)
spelling Characterization of TcCAL1: A calcium binding protein and its role in the life cycle of Trypanosoma cruziCaracterizaciónn de TcCAL1: Una proteína con dominios de unión a calcio y su función en el ciclo de vida de Trypanosoma cruziRodríguez Durán, Jessica JenirethGomez, Karina AndreaPotenza, MarianaTRYPANOSOMA CRUZICALCIUM BINDING PROTEINHOST CELL-INVASIONhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1In Trypanosoma cruzi, several studies have reported that intracellular calcium (iCa2+) levels increase duringmetacyclogenesis and parasite adhesion to host cells. Also, channels that generate variations in iCa2+ concentrationhave been studied. However, most of the proteins that interact with this ion, possibly decodingits signals, have not been characterized. TcCAL1 is a 103 amino acid protein with EF-hand type domainsfor Ca2+ binding, with no known function and specific to kinetoplastids. In this work, we studied the roleof TcCAL1 in some aspects of the parasite life cycle. By western blot, it was demonstrated that TcCAL1is more abundantly expressed in the trypomastigote forms, compared to the amastigote and epimastigotestages. Through immunofluorescence microscopy, it was determined that TcCAL1 is localized throughout thecell body of the three stages mentioned. Also, cultures overexpressing TcCAL1 fused to a six-histidine tag(pTREX/TcCAL1x6His) and cultures containing the empty pTREX vector (controls) were obtained. In metacyclogeneticassays, overexpression of TcCAL1x6His significantly decreased the percentages of differentiationfrom epimastigote to metacyclic trypomastigote forms. When invasion processes were evaluated, overexpressionof TcCAL1x6His caused an increase in the adhesion percentages of metacyclic trypomastigotes to the surfaceof Vero cells, as well as the number of parasites attached per cell. Similarly, the percentages of infected Verocells and the number of intracellular amastigotes per cell increased in cultures overexpressing TcCAL1x6His.However, parasites overexpressing TcCAL1x6His showed similar epimastigote proliferation rates to controls,as well as differentiation of metacyclic trypomastigotes to axenic amastigotes. On the other hand, a yeasttwo-hybrid assay was performed expressing TcCAL1 as bait in conjunction with a T. cruzi cDNA library.As a result, two TcCAL1-interacting proteins were identified, with characteristic armadillo-like or prefoldinlikedomains, respectively. Such interactions were studied by co-immunoprecipitation and mass spectrometry,where a protein with prefoldin domains was also identified. However, no proteins with armadillo domainswere detected. Co-localization by immunofluorescence microscopy of epimastigotes expressing a fragment ofthe armadillo domain protein fused to an HA tag was evaluated using anti-HA and anti-TcCAL1 antibodies.As a result, signal intensity overlap was observed for both antibodies. These results allow us to hypothesizethat TcCAL1x6His limits iCa2+ concentration in the parasite, negatively affecting metacyclogenesis. Also, wepropose that overexpression of TcCAL1x6His promotes the invasiveness of T. cruzi to host cells by activatingsome Ca2+-dependent function. Future studies aim to determine Ca2+ binding to TcCAL1 and to quantifyiCa2+ levels in parasites overexpressing TcCAL1x6His against different components of the extracellular matrix.This study reaffirms the importance of studying uncharacterized proteins exclusive to the parasite to deepenour knowledge of T. cruzi biology.Fil: Rodríguez Durán, Jessica Jenireth. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; ArgentinaFil: Gomez, Karina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; ArgentinaFil: Potenza, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; ArgentinaIX Curso Internacional de Biologia Molecular de Tripanosomatidos; IX Simposio de Biologia Molecular de Enfermedad de ChagasMedellínColombiaUniversidad de AntioquíaUniversidad de Antioquia2022info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectSimposioJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/240696Characterization of TcCAL1: A calcium binding protein and its role in the life cycle of Trypanosoma cruzi; IX Curso Internacional de Biologia Molecular de Tripanosomatidos; IX Simposio de Biologia Molecular de Enfermedad de Chagas; Medellín; Colombia; 2022; 38-380304-35842145-7166CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://revistas.udea.edu.co/index.php/actbio/issue/view/4019Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:35:46Zoai:ri.conicet.gov.ar:11336/240696instacron: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:34982025-09-29 09:35:46.966CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Characterization of TcCAL1: A calcium binding protein and its role in the life cycle of Trypanosoma cruzi
Caracterizaciónn de TcCAL1: Una proteína con dominios de unión a calcio y su función en el ciclo de vida de Trypanosoma cruzi
title Characterization of TcCAL1: A calcium binding protein and its role in the life cycle of Trypanosoma cruzi
spellingShingle Characterization of TcCAL1: A calcium binding protein and its role in the life cycle of Trypanosoma cruzi
Rodríguez Durán, Jessica Jenireth
TRYPANOSOMA CRUZI
CALCIUM BINDING PROTEIN
HOST CELL-INVASION
title_short Characterization of TcCAL1: A calcium binding protein and its role in the life cycle of Trypanosoma cruzi
title_full Characterization of TcCAL1: A calcium binding protein and its role in the life cycle of Trypanosoma cruzi
title_fullStr Characterization of TcCAL1: A calcium binding protein and its role in the life cycle of Trypanosoma cruzi
title_full_unstemmed Characterization of TcCAL1: A calcium binding protein and its role in the life cycle of Trypanosoma cruzi
title_sort Characterization of TcCAL1: A calcium binding protein and its role in the life cycle of Trypanosoma cruzi
dc.creator.none.fl_str_mv Rodríguez Durán, Jessica Jenireth
Gomez, Karina Andrea
Potenza, Mariana
author Rodríguez Durán, Jessica Jenireth
author_facet Rodríguez Durán, Jessica Jenireth
Gomez, Karina Andrea
Potenza, Mariana
author_role author
author2 Gomez, Karina Andrea
Potenza, Mariana
author2_role author
author
dc.subject.none.fl_str_mv TRYPANOSOMA CRUZI
CALCIUM BINDING PROTEIN
HOST CELL-INVASION
topic TRYPANOSOMA CRUZI
CALCIUM BINDING PROTEIN
HOST CELL-INVASION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In Trypanosoma cruzi, several studies have reported that intracellular calcium (iCa2+) levels increase duringmetacyclogenesis and parasite adhesion to host cells. Also, channels that generate variations in iCa2+ concentrationhave been studied. However, most of the proteins that interact with this ion, possibly decodingits signals, have not been characterized. TcCAL1 is a 103 amino acid protein with EF-hand type domainsfor Ca2+ binding, with no known function and specific to kinetoplastids. In this work, we studied the roleof TcCAL1 in some aspects of the parasite life cycle. By western blot, it was demonstrated that TcCAL1is more abundantly expressed in the trypomastigote forms, compared to the amastigote and epimastigotestages. Through immunofluorescence microscopy, it was determined that TcCAL1 is localized throughout thecell body of the three stages mentioned. Also, cultures overexpressing TcCAL1 fused to a six-histidine tag(pTREX/TcCAL1x6His) and cultures containing the empty pTREX vector (controls) were obtained. In metacyclogeneticassays, overexpression of TcCAL1x6His significantly decreased the percentages of differentiationfrom epimastigote to metacyclic trypomastigote forms. When invasion processes were evaluated, overexpressionof TcCAL1x6His caused an increase in the adhesion percentages of metacyclic trypomastigotes to the surfaceof Vero cells, as well as the number of parasites attached per cell. Similarly, the percentages of infected Verocells and the number of intracellular amastigotes per cell increased in cultures overexpressing TcCAL1x6His.However, parasites overexpressing TcCAL1x6His showed similar epimastigote proliferation rates to controls,as well as differentiation of metacyclic trypomastigotes to axenic amastigotes. On the other hand, a yeasttwo-hybrid assay was performed expressing TcCAL1 as bait in conjunction with a T. cruzi cDNA library.As a result, two TcCAL1-interacting proteins were identified, with characteristic armadillo-like or prefoldinlikedomains, respectively. Such interactions were studied by co-immunoprecipitation and mass spectrometry,where a protein with prefoldin domains was also identified. However, no proteins with armadillo domainswere detected. Co-localization by immunofluorescence microscopy of epimastigotes expressing a fragment ofthe armadillo domain protein fused to an HA tag was evaluated using anti-HA and anti-TcCAL1 antibodies.As a result, signal intensity overlap was observed for both antibodies. These results allow us to hypothesizethat TcCAL1x6His limits iCa2+ concentration in the parasite, negatively affecting metacyclogenesis. Also, wepropose that overexpression of TcCAL1x6His promotes the invasiveness of T. cruzi to host cells by activatingsome Ca2+-dependent function. Future studies aim to determine Ca2+ binding to TcCAL1 and to quantifyiCa2+ levels in parasites overexpressing TcCAL1x6His against different components of the extracellular matrix.This study reaffirms the importance of studying uncharacterized proteins exclusive to the parasite to deepenour knowledge of T. cruzi biology.
Fil: Rodríguez Durán, Jessica Jenireth. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; Argentina
Fil: Gomez, Karina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; Argentina
Fil: Potenza, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; Argentina
IX Curso Internacional de Biologia Molecular de Tripanosomatidos; IX Simposio de Biologia Molecular de Enfermedad de Chagas
Medellín
Colombia
Universidad de Antioquía
description In Trypanosoma cruzi, several studies have reported that intracellular calcium (iCa2+) levels increase duringmetacyclogenesis and parasite adhesion to host cells. Also, channels that generate variations in iCa2+ concentrationhave been studied. However, most of the proteins that interact with this ion, possibly decodingits signals, have not been characterized. TcCAL1 is a 103 amino acid protein with EF-hand type domainsfor Ca2+ binding, with no known function and specific to kinetoplastids. In this work, we studied the roleof TcCAL1 in some aspects of the parasite life cycle. By western blot, it was demonstrated that TcCAL1is more abundantly expressed in the trypomastigote forms, compared to the amastigote and epimastigotestages. Through immunofluorescence microscopy, it was determined that TcCAL1 is localized throughout thecell body of the three stages mentioned. Also, cultures overexpressing TcCAL1 fused to a six-histidine tag(pTREX/TcCAL1x6His) and cultures containing the empty pTREX vector (controls) were obtained. In metacyclogeneticassays, overexpression of TcCAL1x6His significantly decreased the percentages of differentiationfrom epimastigote to metacyclic trypomastigote forms. When invasion processes were evaluated, overexpressionof TcCAL1x6His caused an increase in the adhesion percentages of metacyclic trypomastigotes to the surfaceof Vero cells, as well as the number of parasites attached per cell. Similarly, the percentages of infected Verocells and the number of intracellular amastigotes per cell increased in cultures overexpressing TcCAL1x6His.However, parasites overexpressing TcCAL1x6His showed similar epimastigote proliferation rates to controls,as well as differentiation of metacyclic trypomastigotes to axenic amastigotes. On the other hand, a yeasttwo-hybrid assay was performed expressing TcCAL1 as bait in conjunction with a T. cruzi cDNA library.As a result, two TcCAL1-interacting proteins were identified, with characteristic armadillo-like or prefoldinlikedomains, respectively. Such interactions were studied by co-immunoprecipitation and mass spectrometry,where a protein with prefoldin domains was also identified. However, no proteins with armadillo domainswere detected. Co-localization by immunofluorescence microscopy of epimastigotes expressing a fragment ofthe armadillo domain protein fused to an HA tag was evaluated using anti-HA and anti-TcCAL1 antibodies.As a result, signal intensity overlap was observed for both antibodies. These results allow us to hypothesizethat TcCAL1x6His limits iCa2+ concentration in the parasite, negatively affecting metacyclogenesis. Also, wepropose that overexpression of TcCAL1x6His promotes the invasiveness of T. cruzi to host cells by activatingsome Ca2+-dependent function. Future studies aim to determine Ca2+ binding to TcCAL1 and to quantifyiCa2+ levels in parasites overexpressing TcCAL1x6His against different components of the extracellular matrix.This study reaffirms the importance of studying uncharacterized proteins exclusive to the parasite to deepenour knowledge of T. cruzi biology.
publishDate 2022
dc.date.none.fl_str_mv 2022
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info:ar-repo/semantics/documentoDeConferencia
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dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/240696
Characterization of TcCAL1: A calcium binding protein and its role in the life cycle of Trypanosoma cruzi; IX Curso Internacional de Biologia Molecular de Tripanosomatidos; IX Simposio de Biologia Molecular de Enfermedad de Chagas; Medellín; Colombia; 2022; 38-38
0304-3584
2145-7166
CONICET Digital
CONICET
url http://hdl.handle.net/11336/240696
identifier_str_mv Characterization of TcCAL1: A calcium binding protein and its role in the life cycle of Trypanosoma cruzi; IX Curso Internacional de Biologia Molecular de Tripanosomatidos; IX Simposio de Biologia Molecular de Enfermedad de Chagas; Medellín; Colombia; 2022; 38-38
0304-3584
2145-7166
CONICET Digital
CONICET
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publisher.none.fl_str_mv Universidad de Antioquia
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