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Identification and localization of alpha and beta spectrins in oocytes of three antarctic teleosts: Trematomus bernacchii, trematomus newnesi (Nototheniidae) and Chionodraco hamatus (Channichthyidae)
- Publication Year :
- 2007
-
Abstract
- The presence and localization of α- and β-spectrins and of the spectrin cross-linking protein actin were investigated, in previtellogenic oocytes of three species of Antarctic teleosts: the two red-blooded nototheniids, Trematomus bernacchii and Trematomus newnesi, and the channichthyid, the ice fish Chionodraco hamatus. Analyses by western blotting indicated that these species had an unusual abundance of spectrin isoforms and that they were characterized by rather low molecular masses. The immunocytochemistry in situ demonstrated that α- and β-spectrins showed a variable pattern of localization that clearly depended on both the species considered and the stage of oocyte differentiation. In particular, the two Trematomus spp. showed a distribution of spectrins absolutely comparable and rather different from that of C. hamatus. The evidences collected confirmed that channichthyids have isolated early from the group of red-blooded species and suggest that in notothenioids significant changes might have occurred in spectrin genes and in their protein products.
- Subjects :
- Gene isoform
biology
actin localization
chorion
notothenioids
previtellogenic oocytes
spectrin isoforms
Immunocytochemistry
previtellogenic oocyte
Anatomy
macromolecular substances
Aquatic Science
biology.organism_classification
Channichthyidae
notothenioid
Biochemistry
Chionodraco hamatus
Trematomus
Nototheniidae
Spectrin
Oocyte differentiation
Ecology, Evolution, Behavior and Systematics
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....d3f83316a3973bcc07ddf2b2f4d9c58f