Pore-linked filaments in anura spermatocyte nuclei
Fuente:
Redalyc
Salvato in:
| Autore principale: | |
|---|---|
| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Academia Brasileira de Ciências
2007
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1876429138477187072 |
|---|---|
| author | Kazumi Fukuda-Pizzocaro |
| author_facet | Kazumi Fukuda-Pizzocaro |
| contents | Pore-linked filaments in anura spermatocyte nuclei Kazumi Fukuda-Pizzocaro Maria Luiza Beçak Multidisciplinaria (Ciencias Naturales y Exactas) pore clustered RNA transport linked filaments intranuclear filaments Pore-linkedfilaments were visualized in spreads of anuran spermatocyte nuclei using transmission electron microscope.We used Odontophrynus diplo and tetraploid species having the tetraploid frogs reduced metabolic activities. Thefilaments with 20-40 nm width are connected to a ring component of the nuclear pore complex with 90-120 nm andextend up to 1μm (or more) into the nucleus. The filaments are curved and connect single or neighboring pores. Theintranuclear filaments are associated with chromatin fibers and related to RNP particles of 20-25 nm and spheroidalstructures of 0.5μm, with variations. The aggregates of several neighboring pores with thefilaments are more commonlyobserved in 4n nuclei. We concluded that the intranuclear filaments may correspond to the fibrillar network describedin Xenopus oocyte nucleus being probably related to RNA transport. The molecular basis of this RNA remainselusive. Nevertheless, the morphological aspects of the spheroidal structures indicate they could correspond to nucleolarchromatin or to nucleolus-derived structures. We also speculate whether the complex aggregates of neighboring poreswith intranuclear filaments may correspond to pore clustering previously described in these tetraploid animals usingfreeze-etching experiments. 2007 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32779109 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.79 |
| format | Artículo científico |
| id | redalyc_32779109 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Pore-linked filaments in anura spermatocyte nuclei Kazumi Fukuda-Pizzocaro Multidisciplinaria (Ciencias Naturales y Exactas) pore clustered RNA transport linked filaments intranuclear filaments Pore-linked filaments in anura spermatocyte nuclei Kazumi Fukuda-Pizzocaro Maria Luiza Beçak Multidisciplinaria (Ciencias Naturales y Exactas) pore clustered RNA transport linked filaments intranuclear filaments Pore-linkedfilaments were visualized in spreads of anuran spermatocyte nuclei using transmission electron microscope.We used Odontophrynus diplo and tetraploid species having the tetraploid frogs reduced metabolic activities. Thefilaments with 20-40 nm width are connected to a ring component of the nuclear pore complex with 90-120 nm andextend up to 1μm (or more) into the nucleus. The filaments are curved and connect single or neighboring pores. Theintranuclear filaments are associated with chromatin fibers and related to RNP particles of 20-25 nm and spheroidalstructures of 0.5μm, with variations. The aggregates of several neighboring pores with thefilaments are more commonlyobserved in 4n nuclei. We concluded that the intranuclear filaments may correspond to the fibrillar network describedin Xenopus oocyte nucleus being probably related to RNA transport. The molecular basis of this RNA remainselusive. Nevertheless, the morphological aspects of the spheroidal structures indicate they could correspond to nucleolarchromatin or to nucleolus-derived structures. We also speculate whether the complex aggregates of neighboring poreswith intranuclear filaments may correspond to pore clustering previously described in these tetraploid animals usingfreeze-etching experiments. 2007 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32779109 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.79 |
| title | Pore-linked filaments in anura spermatocyte nuclei |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) pore clustered RNA transport linked filaments intranuclear filaments |
| url | https://www.redalyc.org/articulo.oa?id=32779109 |