Tetrahymena meiosis: Simple yet ingenious.
Journal
PLoS genetics
ISSN: 1553-7404
Titre abrégé: PLoS Genet
Pays: United States
ID NLM: 101239074
Informations de publication
Date de publication:
07 2021
07 2021
Historique:
entrez:
15
7
2021
pubmed:
16
7
2021
medline:
30
10
2021
Statut:
epublish
Résumé
The presence of meiosis, which is a conserved component of sexual reproduction, across organisms from all eukaryotic kingdoms, strongly argues that sex is a primordial feature of eukaryotes. However, extant meiotic structures and processes can vary considerably between organisms. The ciliated protist Tetrahymena thermophila, which diverged from animals, plants, and fungi early in evolution, provides one example of a rather unconventional meiosis. Tetrahymena has a simpler meiosis compared with most other organisms: It lacks both a synaptonemal complex (SC) and specialized meiotic machinery for chromosome cohesion and has a reduced capacity to regulate meiotic recombination. Despite this, it also features several unique mechanisms, including elongation of the nucleus to twice the cell length to promote homologous pairing and prevent recombination between sister chromatids. Comparison of the meiotic programs of Tetrahymena and higher multicellular organisms may reveal how extant meiosis evolved from proto-meiosis.
Identifiants
pubmed: 34264933
doi: 10.1371/journal.pgen.1009627
pii: PGENETICS-D-21-00564
pmc: PMC8282021
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Review
Langues
eng
Sous-ensembles de citation
IM
Pagination
e1009627Subventions
Organisme : Austrian Science Fund FWF
ID : P 31606
Pays : Austria
Déclaration de conflit d'intérêts
The author has declared that no competing interests exist.
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