A Lineage-Specific Paralog of <i>Oma1</i> Evolved into a Gene Family from Which a Suppressor of Male Sterility-Inducing Mitochondria Emerged in Plants
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- Daniel Sloan
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書誌事項
- タイトル別名
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- A Lineage-Specific Paralog of Oma1 Evolved into a Gene Family from Which a Suppressor of Male Sterility-Inducing Mitochondria Emerged in Plants
抄録
Cytoplasmic male sterility (MS) in plants is caused by MS-inducing mitochondria, which have emerged frequently during plant evolution. Nuclear restorer-of-fertility (Rf)genes can suppress their cognateMS-inducing mitochondria.Whereas many Rfs encode a class of RNA-binding protein, the sugar beet (Caryophyllales) Rf encodes a protein resemblingOma1,which is involved in the quality control ofmitochondria. In this study, we investigated the molecular evolution of Oma1 homologs in plants.We analyzed 37 plant genomes and concluded that a single copy is the ancestral state in Caryophyllales. Among the sugar beet Oma1 homologs, the orthologous copy is located in a syntenic region that is preserved in Arabidopsis thaliana. The sugar beet Rf is a complex locus consisting of a smallOma1homolog family (RF-Oma1 family) unique to sugar beet. The gene arrangement in the vicinity of the locus is seen in some but not allCaryophyllalean plants and is absent fromAr. thaliana. This suggests a segmental duplication rather than a whole-genome duplication as themechanism of RF-Oma1 evolution.Of thirty-seven positively selected codons in RF-Oma1, twentysix of these sites are located in predicted transmembrane helices. Phylogenetic network analysis indicated that homologous recombination among the RF-Oma1 members played an important role to generate protein activity related to suppression. Together, our data illustrate how an evolutionarily young Rf has emerged from a lineage-specific paralog. Interestingly, several evolutionary features are sharedwith the RNA-binding protein type Rfs.Hence, the evolution of the sugar beet Rf is representative of Rf evolution in general.
収録刊行物
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- Genome Biology and Evolution
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Genome Biology and Evolution 12 (12), 2314-2327, 2020-08-27
Society for Molecular Biology and Evolution
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詳細情報 詳細情報について
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- CRID
- 1050287540572226176
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- NII論文ID
- 120006939393
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- HANDLE
- 2115/79923
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- ISSN
- 17596653
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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