Evolutionary Conservation and Diversification of the Translation Initiation Apparatus in Trypanosomatids
Joint Authors
Shapira, Michal
Zinoviev, Alexandra
Source
Comparative and Functional Genomics
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-07-08
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Trypanosomatids are ancient eukaryotic parasites that migrate between insect vectors and mammalian hosts, causing a range of diseases in humans and domestic animals.
Trypanosomatids feature a multitude of unusual molecular features, including polycistronic transcription and subsequent processing by trans-splicing and polyadenylation.
Regulation of protein coding genes is posttranscriptional and thus, translation regulation is fundamental for activating the developmental program of gene expression.
The spliced-leader RNA is attached to all mRNAs.
It contains an unusual hypermethylated cap-4 structure in its 5′ end.
The cap-binding complex, eIF4F, has gone through evolutionary changes in accordance with the requirement to bind cap-4.
The eIF4F components in trypanosomatids are highly diverged from their orthologs in higher eukaryotes, and their potential functions are discussed.
The cap-binding activity in all eukaryotes is a target for regulation and plays a similar role in trypanosomatids.
Recent studies revealed a novel eIF4E-interacting protein, involved in directing stage-specific and stress-induced translation pathways.
Translation regulation during stress also follows unusual regulatory cues, as the increased translation of Hsp83 following heat stress is driven by a defined element in the 3′ UTR, unlike higher eukaryotes.
Overall, the environmental switches experienced by trypanosomatids during their life cycle seem to affect their translational machinery in unique ways.
American Psychological Association (APA)
Zinoviev, Alexandra& Shapira, Michal. 2012. Evolutionary Conservation and Diversification of the Translation Initiation Apparatus in Trypanosomatids. Comparative and Functional Genomics،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-500136
Modern Language Association (MLA)
Zinoviev, Alexandra& Shapira, Michal. Evolutionary Conservation and Diversification of the Translation Initiation Apparatus in Trypanosomatids. Comparative and Functional Genomics No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-500136
American Medical Association (AMA)
Zinoviev, Alexandra& Shapira, Michal. Evolutionary Conservation and Diversification of the Translation Initiation Apparatus in Trypanosomatids. Comparative and Functional Genomics. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-500136
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-500136