دورية أكاديمية
أعرض في EDS

A comprehensive analysis of the importance of translation initiation factors for Haloferax volcanii applying deletion and conditional depletion mutants.

التفاصيل البيبلوغرافية
العنوان: A comprehensive analysis of the importance of translation initiation factors for Haloferax volcanii applying deletion and conditional depletion mutants.
المؤلفون: Gäbel K; Institute for Molecular Biosciences, Biocentre, Goethe-University, Frankfurt, Germany., Schmitt J, Schulz S, Näther DJ, Soppa J
المصدر: PloS one [PLoS One] 2013 Nov 14; Vol. 8 (11), pp. e77188. Date of Electronic Publication: 2013 Nov 14 (Print Publication: 2013).
نوع المنشور: Journal Article; Research Support, Non-U.S. Gov't
اللغة: English
بيانات الدورية: Publisher: Public Library of Science Country of Publication: United States NLM ID: 101285081 Publication Model: eCollection Cited Medium: Internet ISSN: 1932-6203 (Electronic) Linking ISSN: 19326203 NLM ISO Abbreviation: PLoS One Subsets: MEDLINE
أسماء مطبوعة: Original Publication: San Francisco, CA : Public Library of Science
مواضيع طبية MeSH: Gene Deletion*, Archaeal Proteins/*genetics , Haloferax volcanii/*genetics , Peptide Chain Initiation, Translational/*physiology , Prokaryotic Initiation Factors/*genetics, Archaeal Proteins/metabolism ; Haloferax volcanii/metabolism ; Prokaryotic Initiation Factors/metabolism
مستخلص: Translation is an important step in gene expression. The initiation of translation is phylogenetically diverse, since currently five different initiation mechanisms are known. For bacteria the three initiation factors IF1 - IF3 are described in contrast to archaea and eukaryotes, which contain a considerably higher number of initiation factor genes. As eukaryotes and archaea use a non-overlapping set of initiation mechanisms, orthologous proteins of both domains do not necessarily fulfill the same function. The genome of Haloferax volcanii contains 14 annotated genes that encode (subunits of) initiation factors. To gain a comprehensive overview of the importance of these genes, it was attempted to construct single gene deletion mutants of all genes. In 9 cases single deletion mutants were successfully constructed, showing that the respective genes are not essential. In contrast, the genes encoding initiation factors aIF1, aIF2γ, aIF5A, aIF5B, and aIF6 were found to be essential. Factors aIF1A and aIF2β are encoded by two orthologous genes in H. volcanii. Attempts to generate double mutants failed in both cases, indicating that also these factors are essential. A translatome analysis of one of the single aIF2β deletion mutants revealed that the translational efficiency of the second ortholog was enhanced tenfold and thus the two proteins can replace one another. The phenotypes of the single deletion mutants also revealed that the two aIF1As and aIF2βs have redundant but not identical functions. Remarkably, the gene encoding aIF2α, a subunit of aIF2 involved in initiator tRNA binding, could be deleted. However, the mutant had a severe growth defect under all tested conditions. Conditional depletion mutants were generated for the five essential genes. The phenotypes of deletion mutants and conditional depletion mutants were compared to that of the wild-type under various conditions, and growth characteristics are discussed.
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المشرفين على المادة: 0 (Archaeal Proteins)
0 (Prokaryotic Initiation Factors)
تواريخ الأحداث: Date Created: 20131119 Date Completed: 20140722 Latest Revision: 20211021
رمز التحديث: 20240628
مُعرف محوري في PubMed: PMC3828320
DOI: 10.1371/journal.pone.0077188
PMID: 24244275
قاعدة البيانات: MEDLINE
الوصف
تدمد:1932-6203
DOI:10.1371/journal.pone.0077188