PUBLICATION
A Highly Conserved Poc1 Protein Characterized in Embryos of the Hydrozoan Clytia hemisphaerica: Localization and Functional Studies
- Authors
- Fourrage, C., Chevalier, S., and Houliston, E.
- ID
- ZDB-PUB-101203-1
- Date
- 2010
- Source
- PLoS One 5(11): e13994 (Journal)
- Registered Authors
- Keywords
- none
- MeSH Terms
-
- Animals
- Blotting, Western
- Cell Cycle Proteins/classification
- Cell Cycle Proteins/genetics
- Cell Cycle Proteins/metabolism*
- Centrioles/metabolism*
- DNA, Complementary/chemistry
- DNA, Complementary/genetics
- Embryo, Nonmammalian/embryology
- Embryo, Nonmammalian/metabolism*
- Female
- Fluorescent Antibody Technique
- Gene Expression Regulation, Developmental
- Gene Library
- Hydrozoa/embryology
- Hydrozoa/genetics
- Hydrozoa/metabolism*
- In Situ Hybridization
- Microscopy, Confocal
- Molecular Sequence Data
- Oocytes/metabolism
- Phylogeny
- Sequence Analysis, DNA
- PubMed
- 21103375 Full text @ PLoS One
Citation
Fourrage, C., Chevalier, S., and Houliston, E. (2010) A Highly Conserved Poc1 Protein Characterized in Embryos of the Hydrozoan Clytia hemisphaerica: Localization and Functional Studies. PLoS One. 5(11):e13994.
Abstract
Poc1 (Protein of Centriole 1) proteins are highly conserved WD40 domain-containing centriole components, well characterized in the alga Chlamydomonas, the ciliated protazoan Tetrahymena, the insect Drosophila and in vertebrate cells including Xenopus and zebrafish embryos. Functions and localizations related to the centriole and ciliary axoneme have been demonstrated for Poc1 in a range of species. The vertebrate Poc1 protein has also been reported to show an additional association with mitochondria, including enrichment in the specialized "germ plasm" region of Xenopus oocytes. We have identified and characterized a highly conserved Poc1 protein in the cnidarian Clytia hemisphaerica. Clytia Poc1 mRNA was found to be strongly expressed in eggs and early embryos, showing a punctate perinuclear localization in young oocytes. Fluorescence-tagged Poc1 proteins expressed in developing embryos showed strong localization to centrioles, including basal bodies. Anti-human Poc1 antibodies decorated mitochondria in Clytia, as reported in human cells, but failed to recognise endogenous or fluorescent-tagged Clytia Poc1. Injection of specific morpholino oligonucleotides into Clytia eggs prior to fertilization to repress Poc1 mRNA translation interfered with cell division from the blastula stage, likely corresponding to when neosynthesis normally takes over from maternally supplied protein. Cell cycle lengthening and arrest were observed, phenotypes consistent with an impaired centriolar biogenesis or function. The specificity of the defects could be demonstrated by injection of synthetic Poc1 mRNA, which restored normal development. We conclude that in Clytia embryos, Poc1 has an essentially centriolar localization and function.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping