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首页> 外文期刊>Journal of Experimental Botany >Arabidopsis sterol carrier protein-2 is required for normal development of seeds and seedlings
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Arabidopsis sterol carrier protein-2 is required for normal development of seeds and seedlings

机译：种子和幼苗的正常发育需要拟南芥固醇载体蛋白2

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摘要

The Arabidopsis thaliana sterol carrier protein-2 (AtSCP2) is a small, basic and peroxisomal protein that in vitro enhances the transfer of lipids between membranes. AtSCP2 and all other plant SCP-2 that have been identified are single-domain polypeptides, whereas in many other eukaryotes SCP-2 domains are expressed in the terminus of multidomain polypeptides. The AtSCP2 transcript is expressed in all analysed tissues and developmental stages, with the highest levels in floral tissues and in maturing seeds. The expression of AtSCP2 is highly correlated with the multifunctional protein-2 (MFP2) involved in β-oxidation. A. thaliana Atscp2-1 plants deficient in AtSCP2 show altered seed morphology, a delayed germination, and are dependent on an exogenous carbon source to avoid a delayed seedling establishment. Metabolomic investigations revealed 110 variables (putative metabolites) that differed in relative concentration between Atscp2-1 and normal A. thaliana wild-type seedlings. Microarray analysis revealed that many genes whose expression is altered in mutants with a deficiency in the glyoxylate pathway, also have a changed expression level in Atscp2-1.
机译：拟南芥固醇载体蛋白2（AtSCP2）是一种小的，碱性和过氧化物酶体蛋白，在体外可增强脂质在膜之间的转移。 AtSCP2和所有其他已确认的植物SCP-2是单结构域多肽，而在许多其他真核生物中，SCP-2结构域则在多结构域多肽的末端表达。 AtSCP2转录本在所有分析的组织和发育阶段均表达，在花卉组织和成熟种子中含量最高。 AtSCP2的表达与参与β氧化的多功能蛋白2（MFP2）高度相关。缺乏AtSCP2的拟南芥Atscp2-1植物表现出改变的种子形态，延迟的发芽，并且依赖于外源碳源来避免延迟的幼苗建立。代谢组学研究显示，Atscp2-1和正常拟南芥野生型幼苗之间的相对浓度不同的110个变量（可能的代谢产物）。基因芯片分析显示，许多基因的表达在乙醛酸途径缺乏的突变体中发生了改变，在Atscp2-1中的表达水平也发生了变化。

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  • 来源
    《Journal of Experimental Botany》 |2008年第12期|p.3485-3499|共15页
  • 作者

    Bing Song Zheng12 Elin Rönnberg1 Lenita Viitanen3 Tiina A. Salminen3 Krister Lundgren4 Thomas Moritz4 and Johan Edqvist5*;

  • 作者单位

    1Department of Plant Biology and Forest Genetics, Swedish University of Agricultural Sciences, PO Box 7080, 750 07 Uppsala, Sweden 2School of Forestry and Biotechnology, Zhejiang Forestry University, 311300, Lin An, China 3Department of Biochemistry and Pharmacy, Åbo Akademi University, Artillerigatan 6 A III, FIN-20520 Turku, Finland 4Umeå Plant Science Center, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden 5IFM Biology, Linköping University, 581 83 Linköping, Sweden;

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