Beyond 9+0: noncanonical axoneme structures characterize sensory cilia from protists to humans.
The intracellular amastigote stages of parasites such as Leishmania are often referred to as aflagellate. They do, however, possess a short axoneme of cryptic function. Here, our examination of the structure of this axoneme leads to a testable hypothesis of its role in the cell biology of pathogenic...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2010
|
| _version_ | 1797092678432718848 |
|---|---|
| author | Gluenz, E Höög, J Smith, A Dawe, H Shaw, M Gull, K |
| author_facet | Gluenz, E Höög, J Smith, A Dawe, H Shaw, M Gull, K |
| author_sort | Gluenz, E |
| collection | OXFORD |
| description | The intracellular amastigote stages of parasites such as Leishmania are often referred to as aflagellate. They do, however, possess a short axoneme of cryptic function. Here, our examination of the structure of this axoneme leads to a testable hypothesis of its role in the cell biology of pathogenicity. We show a striking similarity between the microtubule axoneme structure of the Leishmania mexicana parasite infecting a macrophage and vertebrate primary cilia. In both, the 9-fold microtubule doublet symmetry is broken by the incursion of one or more microtubule doublets into the axoneme core, giving rise to an architecture that we term here the 9v (variable) axoneme. Three-dimensional reconstructions revealed that no particular doublet initiated the symmetry break, and moreover it often involved 2 doublets. The tip of the L. mexicana flagellum was frequently intimately associated with the macrophage vacuole membrane. We propose that the main function of the amastigote flagellum is to act as a sensory organelle with important functions in host-parasite interactions and signaling in the intracellular stage of the L. mexicana life cycle. |
| first_indexed | 2024-03-07T03:49:27Z |
| format | Journal article |
| id | oxford-uuid:c0b3eedc-da1a-4b04-af93-6beba712fc0e |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:49:27Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:c0b3eedc-da1a-4b04-af93-6beba712fc0e2022-03-27T05:56:22ZBeyond 9+0: noncanonical axoneme structures characterize sensory cilia from protists to humans.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c0b3eedc-da1a-4b04-af93-6beba712fc0eEnglishSymplectic Elements at Oxford2010Gluenz, EHöög, JSmith, ADawe, HShaw, MGull, KThe intracellular amastigote stages of parasites such as Leishmania are often referred to as aflagellate. They do, however, possess a short axoneme of cryptic function. Here, our examination of the structure of this axoneme leads to a testable hypothesis of its role in the cell biology of pathogenicity. We show a striking similarity between the microtubule axoneme structure of the Leishmania mexicana parasite infecting a macrophage and vertebrate primary cilia. In both, the 9-fold microtubule doublet symmetry is broken by the incursion of one or more microtubule doublets into the axoneme core, giving rise to an architecture that we term here the 9v (variable) axoneme. Three-dimensional reconstructions revealed that no particular doublet initiated the symmetry break, and moreover it often involved 2 doublets. The tip of the L. mexicana flagellum was frequently intimately associated with the macrophage vacuole membrane. We propose that the main function of the amastigote flagellum is to act as a sensory organelle with important functions in host-parasite interactions and signaling in the intracellular stage of the L. mexicana life cycle. |
| spellingShingle | Gluenz, E Höög, J Smith, A Dawe, H Shaw, M Gull, K Beyond 9+0: noncanonical axoneme structures characterize sensory cilia from protists to humans. |
| title | Beyond 9+0: noncanonical axoneme structures characterize sensory cilia from protists to humans. |
| title_full | Beyond 9+0: noncanonical axoneme structures characterize sensory cilia from protists to humans. |
| title_fullStr | Beyond 9+0: noncanonical axoneme structures characterize sensory cilia from protists to humans. |
| title_full_unstemmed | Beyond 9+0: noncanonical axoneme structures characterize sensory cilia from protists to humans. |
| title_short | Beyond 9+0: noncanonical axoneme structures characterize sensory cilia from protists to humans. |
| title_sort | beyond 9 0 noncanonical axoneme structures characterize sensory cilia from protists to humans |
| work_keys_str_mv | AT gluenze beyond90noncanonicalaxonemestructurescharacterizesensoryciliafromprotiststohumans AT hoogj beyond90noncanonicalaxonemestructurescharacterizesensoryciliafromprotiststohumans AT smitha beyond90noncanonicalaxonemestructurescharacterizesensoryciliafromprotiststohumans AT daweh beyond90noncanonicalaxonemestructurescharacterizesensoryciliafromprotiststohumans AT shawm beyond90noncanonicalaxonemestructurescharacterizesensoryciliafromprotiststohumans AT gullk beyond90noncanonicalaxonemestructurescharacterizesensoryciliafromprotiststohumans |