A sialidase mutant displaying trans-sialidase activity
- Autores
- Paris, Gastón; Ratier, Laura; Amaya, María Fernanda; Nguyen, Tong; Alzari, Pedro M.; Frasch, Alberto Carlos C.
- Año de publicación
- 2005
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Trypanosoma cruzi, the agent of Chagas disease, expresses a modified sialidase, the trans-sialidase, which transfers sialic acid from host glycoconjugates to β-galactose present in parasite mucins. Another American trypanosome, Trypanosoma rangeli, expresses a homologous protein that has sialidase activity but is devoid of transglycosidase activity. Based on the recently determined structures of T. rangeli sialidase (TrSA) and T. cruzi trans-sialidase (TcTS), we have now constructed mutants of TrSA with the aim of studing the relevant residues in transfer activity. Five mutations, Met96-Val, Ala98-Pro, Ser120-Tyr, Gly249-Tyr and Gln284-Pro, were enough to obtain a sialidase mutant (TrSA 5mut) with trans-sialidase activity; and a sixth mutation increased the activity to about 10% that of wild-type TcTS. The crystal structure of TrSA 5mut revealed the formation of a trans-sialidase-like binding site for the acceptor galactose, primarily defined by the phenol group of Tyr120 and the indole ring of Trp313, which adopts a new conformation, similar to that in TcTS, induced by the Gln284-Pro mutation. The transition state analogue 2,3-didehydro-2-deoxy-N-acetylneuraminic acid (DANA), which inhibits sialidases but is a poor inhibitor of trans-sialidase, was used to probe the active site conformation of mutant enzymes. The results show that the presence of a sugar acceptor binding-site, the fine-tuning of protein-substrate interactions and the flexibility of crucial active site residues are all important to achieve transglycosidase activity from the TrSA sialidase scaffold.
Fil: Paris, Gastón. Universidad Nacional de San Martín; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Bioquímicas de Buenos Aires. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires; Argentina
Fil: Ratier, Laura. Universidad Nacional de San Martín; Argentina
Fil: Amaya, María Fernanda. Instituto Pasteur; Francia
Fil: Nguyen, Tong. Instituto Pasteur; Francia
Fil: Alzari, Pedro M.. Instituto Pasteur; Francia
Fil: Frasch, Alberto Carlos C.. Universidad Nacional de San Martín; Argentina - Materia
-
Protein Engineering
Sialidase
Trans-Sialidase
Trypanosoma Cruzi
Trypanosoma Rangeli - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/39546
Ver los metadatos del registro completo
id |
CONICETDig_5f6c7ea836c76ff9084b4546cf47f374 |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/39546 |
network_acronym_str |
CONICETDig |
repository_id_str |
3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
A sialidase mutant displaying trans-sialidase activityParis, GastónRatier, LauraAmaya, María FernandaNguyen, TongAlzari, Pedro M.Frasch, Alberto Carlos C.Protein EngineeringSialidaseTrans-SialidaseTrypanosoma CruziTrypanosoma Rangelihttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Trypanosoma cruzi, the agent of Chagas disease, expresses a modified sialidase, the trans-sialidase, which transfers sialic acid from host glycoconjugates to β-galactose present in parasite mucins. Another American trypanosome, Trypanosoma rangeli, expresses a homologous protein that has sialidase activity but is devoid of transglycosidase activity. Based on the recently determined structures of T. rangeli sialidase (TrSA) and T. cruzi trans-sialidase (TcTS), we have now constructed mutants of TrSA with the aim of studing the relevant residues in transfer activity. Five mutations, Met96-Val, Ala98-Pro, Ser120-Tyr, Gly249-Tyr and Gln284-Pro, were enough to obtain a sialidase mutant (TrSA 5mut) with trans-sialidase activity; and a sixth mutation increased the activity to about 10% that of wild-type TcTS. The crystal structure of TrSA 5mut revealed the formation of a trans-sialidase-like binding site for the acceptor galactose, primarily defined by the phenol group of Tyr120 and the indole ring of Trp313, which adopts a new conformation, similar to that in TcTS, induced by the Gln284-Pro mutation. The transition state analogue 2,3-didehydro-2-deoxy-N-acetylneuraminic acid (DANA), which inhibits sialidases but is a poor inhibitor of trans-sialidase, was used to probe the active site conformation of mutant enzymes. The results show that the presence of a sugar acceptor binding-site, the fine-tuning of protein-substrate interactions and the flexibility of crucial active site residues are all important to achieve transglycosidase activity from the TrSA sialidase scaffold.Fil: Paris, Gastón. Universidad Nacional de San Martín; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Bioquímicas de Buenos Aires. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires; ArgentinaFil: Ratier, Laura. Universidad Nacional de San Martín; ArgentinaFil: Amaya, María Fernanda. Instituto Pasteur; FranciaFil: Nguyen, Tong. Instituto Pasteur; FranciaFil: Alzari, Pedro M.. Instituto Pasteur; FranciaFil: Frasch, Alberto Carlos C.. Universidad Nacional de San Martín; ArgentinaElsevier2005-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/39546Paris, Gastón; Ratier, Laura; Amaya, María Fernanda; Nguyen, Tong; Alzari, Pedro M.; et al.; A sialidase mutant displaying trans-sialidase activity; Elsevier; Journal Of Molecular Biology; 345; 4; 1-2005; 923-9340022-28361089-8638CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S002228360401174Xinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmb.2004.09.031info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:07:33Zoai:ri.conicet.gov.ar:11336/39546instacron: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:34982025-09-03 10:07:33.754CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
A sialidase mutant displaying trans-sialidase activity |
title |
A sialidase mutant displaying trans-sialidase activity |
spellingShingle |
A sialidase mutant displaying trans-sialidase activity Paris, Gastón Protein Engineering Sialidase Trans-Sialidase Trypanosoma Cruzi Trypanosoma Rangeli |
title_short |
A sialidase mutant displaying trans-sialidase activity |
title_full |
A sialidase mutant displaying trans-sialidase activity |
title_fullStr |
A sialidase mutant displaying trans-sialidase activity |
title_full_unstemmed |
A sialidase mutant displaying trans-sialidase activity |
title_sort |
A sialidase mutant displaying trans-sialidase activity |
dc.creator.none.fl_str_mv |
Paris, Gastón Ratier, Laura Amaya, María Fernanda Nguyen, Tong Alzari, Pedro M. Frasch, Alberto Carlos C. |
author |
Paris, Gastón |
author_facet |
Paris, Gastón Ratier, Laura Amaya, María Fernanda Nguyen, Tong Alzari, Pedro M. Frasch, Alberto Carlos C. |
author_role |
author |
author2 |
Ratier, Laura Amaya, María Fernanda Nguyen, Tong Alzari, Pedro M. Frasch, Alberto Carlos C. |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Protein Engineering Sialidase Trans-Sialidase Trypanosoma Cruzi Trypanosoma Rangeli |
topic |
Protein Engineering Sialidase Trans-Sialidase Trypanosoma Cruzi Trypanosoma Rangeli |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Trypanosoma cruzi, the agent of Chagas disease, expresses a modified sialidase, the trans-sialidase, which transfers sialic acid from host glycoconjugates to β-galactose present in parasite mucins. Another American trypanosome, Trypanosoma rangeli, expresses a homologous protein that has sialidase activity but is devoid of transglycosidase activity. Based on the recently determined structures of T. rangeli sialidase (TrSA) and T. cruzi trans-sialidase (TcTS), we have now constructed mutants of TrSA with the aim of studing the relevant residues in transfer activity. Five mutations, Met96-Val, Ala98-Pro, Ser120-Tyr, Gly249-Tyr and Gln284-Pro, were enough to obtain a sialidase mutant (TrSA 5mut) with trans-sialidase activity; and a sixth mutation increased the activity to about 10% that of wild-type TcTS. The crystal structure of TrSA 5mut revealed the formation of a trans-sialidase-like binding site for the acceptor galactose, primarily defined by the phenol group of Tyr120 and the indole ring of Trp313, which adopts a new conformation, similar to that in TcTS, induced by the Gln284-Pro mutation. The transition state analogue 2,3-didehydro-2-deoxy-N-acetylneuraminic acid (DANA), which inhibits sialidases but is a poor inhibitor of trans-sialidase, was used to probe the active site conformation of mutant enzymes. The results show that the presence of a sugar acceptor binding-site, the fine-tuning of protein-substrate interactions and the flexibility of crucial active site residues are all important to achieve transglycosidase activity from the TrSA sialidase scaffold. Fil: Paris, Gastón. Universidad Nacional de San Martín; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Bioquímicas de Buenos Aires. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires; Argentina Fil: Ratier, Laura. Universidad Nacional de San Martín; Argentina Fil: Amaya, María Fernanda. Instituto Pasteur; Francia Fil: Nguyen, Tong. Instituto Pasteur; Francia Fil: Alzari, Pedro M.. Instituto Pasteur; Francia Fil: Frasch, Alberto Carlos C.. Universidad Nacional de San Martín; Argentina |
description |
Trypanosoma cruzi, the agent of Chagas disease, expresses a modified sialidase, the trans-sialidase, which transfers sialic acid from host glycoconjugates to β-galactose present in parasite mucins. Another American trypanosome, Trypanosoma rangeli, expresses a homologous protein that has sialidase activity but is devoid of transglycosidase activity. Based on the recently determined structures of T. rangeli sialidase (TrSA) and T. cruzi trans-sialidase (TcTS), we have now constructed mutants of TrSA with the aim of studing the relevant residues in transfer activity. Five mutations, Met96-Val, Ala98-Pro, Ser120-Tyr, Gly249-Tyr and Gln284-Pro, were enough to obtain a sialidase mutant (TrSA 5mut) with trans-sialidase activity; and a sixth mutation increased the activity to about 10% that of wild-type TcTS. The crystal structure of TrSA 5mut revealed the formation of a trans-sialidase-like binding site for the acceptor galactose, primarily defined by the phenol group of Tyr120 and the indole ring of Trp313, which adopts a new conformation, similar to that in TcTS, induced by the Gln284-Pro mutation. The transition state analogue 2,3-didehydro-2-deoxy-N-acetylneuraminic acid (DANA), which inhibits sialidases but is a poor inhibitor of trans-sialidase, was used to probe the active site conformation of mutant enzymes. The results show that the presence of a sugar acceptor binding-site, the fine-tuning of protein-substrate interactions and the flexibility of crucial active site residues are all important to achieve transglycosidase activity from the TrSA sialidase scaffold. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-01 |
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/11336/39546 Paris, Gastón; Ratier, Laura; Amaya, María Fernanda; Nguyen, Tong; Alzari, Pedro M.; et al.; A sialidase mutant displaying trans-sialidase activity; Elsevier; Journal Of Molecular Biology; 345; 4; 1-2005; 923-934 0022-2836 1089-8638 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/39546 |
identifier_str_mv |
Paris, Gastón; Ratier, Laura; Amaya, María Fernanda; Nguyen, Tong; Alzari, Pedro M.; et al.; A sialidase mutant displaying trans-sialidase activity; Elsevier; Journal Of Molecular Biology; 345; 4; 1-2005; 923-934 0022-2836 1089-8638 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S002228360401174X info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmb.2004.09.031 |
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 application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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 |
_version_ |
1842270007072915456 |
score |
13.13397 |