The eIF4F and eIFiso4F Complexes of Plants: An Evolutionary Perspective
Identifieur interne : 001171 ( Main/Exploration ); précédent : 001170; suivant : 001172The eIF4F and eIFiso4F Complexes of Plants: An Evolutionary Perspective
Auteurs : Ryan M. Patrick [États-Unis] ; Karen S. Browning [États-Unis]Source :
- Comparative and Functional Genomics [ 1531-6912 ] ; 2012.
Abstract
Translation initiation in eukaryotes requires a number of initiation factors to recruit the assembled ribosome to mRNA. The eIF4F complex plays a key role in initiation and is a common target point for regulation of protein synthesis. Most work on the translation machinery of plants to date has focused on flowering plants, which have both the eIF4F complex (eIF4E and eIF4G) as well as the plant-specific eIFiso4F complex (eIFiso4E and eIFiso4G). The increasing availability of plant genome sequence data has made it possible to trace the evolutionary history of these two complexes in plants, leading to several interesting discoveries. eIFiso4G is conserved throughout plants, while eIFiso4E only appears with the evolution of flowering plants. The eIF4G N-terminus, which has been difficult to annotate, appears to be well conserved throughout the plant lineage and contains two motifs of unknown function. Comparison of eIFiso4G and eIF4G sequence data suggests conserved features unique to eIFiso4G and eIF4G proteins. These findings have answered some questions about the evolutionary history of the two eIF4F complexes of plants, while raising new ones.
Url:
DOI: 10.1155/2012/287814
PubMed: 22611336
PubMed Central: 3352336
Affiliations:
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Patrick</name><affiliation wicri:level="4"><nlm:aff id="I1">Department of Chemistry and Biochemistry and the Institute for Cell and Molecular Biology, The University of Texas at Austin, Austin, TX 78712, USA</nlm:aff><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Chemistry and Biochemistry and the Institute for Cell and Molecular Biology, The University of Texas at Austin, Austin, TX 78712</wicri:regionArea><orgName type="university">Université du Texas à Austin</orgName><placeName><settlement type="city">Austin (Texas)</settlement><region type="state">Texas</region></placeName></affiliation></author><author><name sortKey="Browning, Karen S" sort="Browning, Karen S" uniqKey="Browning K" first="Karen S." last="Browning">Karen S. Browning</name><affiliation wicri:level="4"><nlm:aff id="I1">Department of Chemistry and Biochemistry and the Institute for Cell and Molecular Biology, The University of Texas at Austin, Austin, TX 78712, USA</nlm:aff><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Chemistry and Biochemistry and the Institute for Cell and Molecular Biology, The University of Texas at Austin, Austin, TX 78712</wicri:regionArea><orgName type="university">Université du Texas à Austin</orgName><placeName><settlement type="city">Austin (Texas)</settlement><region type="state">Texas</region></placeName></affiliation></author></analytic><series><title level="j">Comparative and Functional Genomics</title><idno type="ISSN">1531-6912</idno><idno type="eISSN">1532-6268</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Translation initiation in eukaryotes requires a number of initiation factors to recruit the assembled ribosome to mRNA. The eIF4F complex plays a key role in initiation and is a common target point for regulation of protein synthesis. Most work on the translation machinery of plants to date has focused on flowering plants, which have both the eIF4F complex (eIF4E and eIF4G) as well as the plant-specific eIFiso4F complex (eIFiso4E and eIFiso4G). The increasing availability of plant genome sequence data has made it possible to trace the evolutionary history of these two complexes in plants, leading to several interesting discoveries. eIFiso4G is conserved throughout plants, while eIFiso4E only appears with the evolution of flowering plants. The eIF4G N-terminus, which has been difficult to annotate, appears to be well conserved throughout the plant lineage and contains two motifs of unknown function. Comparison of eIFiso4G and eIF4G sequence data suggests conserved features unique to eIFiso4G and eIF4G proteins. These findings have answered some questions about the evolutionary history of the two eIF4F complexes of plants, while raising new ones.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Merrick, Wc" uniqKey="Merrick W">WC Merrick</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Jackson, Rj" uniqKey="Jackson R">RJ Jackson</name></author><author><name sortKey="Hellen, Cut" uniqKey="Hellen C">CUT Hellen</name></author><author><name sortKey="Pestova, Tv" uniqKey="Pestova T">TV Pestova</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Wells, Se" uniqKey="Wells S">SE Wells</name></author><author><name sortKey="Hillner, Pe" uniqKey="Hillner P">PE Hillner</name></author><author><name sortKey="Vale, Rd" uniqKey="Vale R">RD Vale</name></author><author><name sortKey="Sachs, Ab" uniqKey="Sachs A">AB 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