Identification of a glycosylphosphatidylinositol anchor-modifying beta1-3 galactosyltransferase in Trypanosoma brucei
Trypanosoma brucei is the causative agent of human African sleeping sickness and the cattle disease nagana. T. brucei is dependent on glycoproteins for its survival and infectivity throughout its life cycle. Here we report the functional characterization of TbGT3, a glycosyltransferase expressed in...
| Authors: | ; ; ; |
|---|---|
| Format: | Article |
| Status: | Published version |
| Publication date: | 2015 |
| Country: | España |
| Institution: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repository: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/99511 |
| Online Access: | https://hdl.handle.net/2445/99511 |
| Access Level: | Open access |
| Keyword: | Malalties parasitàries Protozoosi Parasitic diseases Protozoan diseases |
| _version_ | 1878731166215831552 |
|---|---|
| author | Izquierdo Lázaro, Luis |
| author2 | Acosta-Serrano, Alvaro Mehlert, Angela Ferguson, Michael A. J. |
| author2_role | author author author |
| author_browse | Acosta-Serrano, Alvaro Ferguson, Michael A. J. Izquierdo Lázaro, Luis Mehlert, Angela |
| author_facet | Izquierdo Lázaro, Luis Acosta-Serrano, Alvaro Mehlert, Angela Ferguson, Michael A. J. |
| author_role | author |
| collection | Recercat. Dipósit de la Recerca de Catalunya |
| description | Trypanosoma brucei is the causative agent of human African sleeping sickness and the cattle disease nagana. T. brucei is dependent on glycoproteins for its survival and infectivity throughout its life cycle. Here we report the functional characterization of TbGT3, a glycosyltransferase expressed in the bloodstream and procyclic-form of the parasite. Bloodstream and procyclic-form TbGT3 conditional null mutants were created and both exhibited normal growth under permissive and non-permissive conditions. Under non-permissive conditions, the normal glycosylation of the major glycoprotein of bloodstream form T. brucei, the variant surface glycoprotein, and the absence of major alterations in lectin binding to other glycoproteins suggested that the major function of TbGT3 occurs in the procyclic form of the parasite. Consistent with this, the major surface glycoprotein of the procyclic form, procyclin, exhibited a marked reduction in molecular weight due to changes in glycosylphosphatidylinositol (GPI) anchor side-chains. Structural analysis of the mutant procyclin GPI anchors indicated that TbGT3 encodes a UDP-Gal: beta-GlcNAc-GPI beta1-3 Gal transferase. Despite the alterations in GPI anchor side chains, TbGT3 conditional null mutants remained infectious to tsetse flies under non-permissive conditions. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_2a2f02151b162ea6cbd1dfdca62694ac |
| institution | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| instname_str | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:recercat.cat:2445/99511 |
| publishDate | 2015 |
| publishDateSort | 2015 |
| publisher | Oxford University Press |
| publisherStr | Oxford University Press |
| reponame_str | Recercat. Dipósit de la Recerca de Catalunya |
| spelling | Identification of a glycosylphosphatidylinositol anchor-modifying beta1-3 galactosyltransferase in Trypanosoma brucei Izquierdo Lázaro, Luis Acosta-Serrano, Alvaro Mehlert, Angela Ferguson, Michael A. J. Malalties parasitàries Protozoosi Parasitic diseases Protozoan diseases Trypanosoma brucei is the causative agent of human African sleeping sickness and the cattle disease nagana. T. brucei is dependent on glycoproteins for its survival and infectivity throughout its life cycle. Here we report the functional characterization of TbGT3, a glycosyltransferase expressed in the bloodstream and procyclic-form of the parasite. Bloodstream and procyclic-form TbGT3 conditional null mutants were created and both exhibited normal growth under permissive and non-permissive conditions. Under non-permissive conditions, the normal glycosylation of the major glycoprotein of bloodstream form T. brucei, the variant surface glycoprotein, and the absence of major alterations in lectin binding to other glycoproteins suggested that the major function of TbGT3 occurs in the procyclic form of the parasite. Consistent with this, the major surface glycoprotein of the procyclic form, procyclin, exhibited a marked reduction in molecular weight due to changes in glycosylphosphatidylinositol (GPI) anchor side-chains. Structural analysis of the mutant procyclin GPI anchors indicated that TbGT3 encodes a UDP-Gal: beta-GlcNAc-GPI beta1-3 Gal transferase. Despite the alterations in GPI anchor side chains, TbGT3 conditional null mutants remained infectious to tsetse flies under non-permissive conditions. Oxford University Press https://hdl.handle.net/2445/99511 |
| spellingShingle | Identification of a glycosylphosphatidylinositol anchor-modifying beta1-3 galactosyltransferase in Trypanosoma brucei Izquierdo Lázaro, Luis Malalties parasitàries Protozoosi Parasitic diseases Protozoan diseases |
| status_str | publishedVersion |
| title | Identification of a glycosylphosphatidylinositol anchor-modifying beta1-3 galactosyltransferase in Trypanosoma brucei |
| title_full | Identification of a glycosylphosphatidylinositol anchor-modifying beta1-3 galactosyltransferase in Trypanosoma brucei |
| title_fullStr | Identification of a glycosylphosphatidylinositol anchor-modifying beta1-3 galactosyltransferase in Trypanosoma brucei |
| title_full_unstemmed | Identification of a glycosylphosphatidylinositol anchor-modifying beta1-3 galactosyltransferase in Trypanosoma brucei |
| title_short | Identification of a glycosylphosphatidylinositol anchor-modifying beta1-3 galactosyltransferase in Trypanosoma brucei |
| title_sort | Identification of a glycosylphosphatidylinositol anchor-modifying beta1-3 galactosyltransferase in Trypanosoma brucei |
| topic | Malalties parasitàries Protozoosi Parasitic diseases Protozoan diseases |
| topic_facet | Malalties parasitàries Protozoosi Parasitic diseases Protozoan diseases |
| url | https://hdl.handle.net/2445/99511 |