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OsCAF1, a CRM Domain Containing Protein, Influences Chloroplast Development

文献类型： 外文期刊

作者： Zhang, Qiang 1 ; Shen, Lan 1 ; Wang, Zhongwei 2 ; Hu, Guanglian 1 ; Ren, Deyong 1 ; Hu, Jiang 1 ; Zhu, Li 1 ; Gao, Zhenyu 1 ;

作者机构： 1.Chinese Acad Agr Sci, China Natl Rice Res Inst, State Key Lab Rice Biol, Hangzhou 310006, Zhejiang, Peoples R China

2.Chongqing Acad Agr Sci, Biotechnol Res Ctr, Chongqing 401329, Peoples R China

关键词： chloroplast RNA splicing and ribosome maturation (CRM) domain; intron splicing; chloroplast development; rice

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN：

年卷期： 2019 年 20 卷 18 期

页码：

收录情况： SCI

摘要： The chloroplast RNA splicing and ribosome maturation (CRM) domain proteins are involved in the splicing of chloroplast gene introns. Numerous CRM domain proteins have been reported to play key roles in chloroplast development in several plant species. However, the functions of CRM domain proteins in chloroplast development in rice remain poorly understood. In the study, we generated oscaf1 albino mutants, which eventually died at the seedling stage, through the editing of OsCAF1 with two CRM domains using CRISPR/Cas9 technology. The mesophyll cells in oscaf1 mutant had decreased chloroplast numbers and damaged chloroplast structures. OsCAF1 was located in the chloroplast, and transcripts revealed high levels in green tissues. In addition, the OsCAF1 promoted the splicing of group IIA and group IIB introns, unlike orthologous proteins of AtCAF1 and ZmCAF1, which only affected the splicing of subgroup IIB introns. We also observed that the C-terminal of OsCAF1 interacts with OsCRS2, and OsCAF1-OsCRS2 complex may participate in the splicing of group IIA and group IIB introns in rice chloroplasts. OsCAF1 regulates chloroplast development by influencing the splicing of group II introns.

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