The Ectocarpus IMMEDIATE UPRIGHT gene encodes a member of a novel family of cysteine-rich proteins with an unusual distribution across the eukaryotes

文献类型： 外文期刊

第一作者： Macaisne, Nicolas

作者： Macaisne, Nicolas;Liu, Fuli;Scornet, Delphine;Lipinska, Agnieszka;Perrineau, Marie-Mathilde;Henry, Antoine;Strittmatter, Martina;Coelho, Susana M.;Cock, J. Mark;Peters, Akira F.;Liu, Fuli

作者机构：

关键词： Brown algae; Ectocarpus; Horizontal gene transfer; Initial cell division; Life cycle; Virus

期刊名称：DEVELOPMENT （ 影响因子：6.868； 五年影响因子：7.522 ）

ISSN： 0950-1991

年卷期： 2017 年 144 卷 3 期

页码：

收录情况： SCI

摘要： The sporophyte generation of the brown alga Ectocarpus sp. exhibits an unusual pattern of development compared with the majority of brown algae. The first cell division is symmetrical and the apical-basal axis is established late in development. In the immediate upright (imm) mutant, the initial cell undergoes an asymmetric division to immediately establish the apical-basal axis. We provide evidence which suggests that this phenotype corresponds to the ancestral state of the sporophyte. The IMM gene encodes a protein of unknown function that contains a repeated motif also found in the EsV-1-7 gene of the Ectocarpus virus EsV-1. Brown algae possess large families of EsV-1-7 domain genes but these genes are rare in other stramenopiles, suggesting that the expansion of this family might have been linked with the emergence of multicellular complexity. EsV-1-7 domain genes have a patchy distribution across eukaryotic supergroups and occur in several viral genomes, suggesting possible horizontal transfer during eukaryote evolution.

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