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Peroxisomal ACBD4 interacts with VAPB and promotes ER-peroxisome associations

机译:过氧化血剂ACBD4与VAPB相互作用并促进ER-过氧缺血协会

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摘要

Cooperation between cellular organelles such as mitochondria, peroxisomes and the ER is essential for a variety of important and diverse metabolic processes. Effective communication and metabolite exchange requires physical linkages between the organelles, predominantly in the form of organelle contact sites. At such contact sites organelle membranes are brought into close proximity by the action of molecular tethers, which often consist of specific protein pairs anchored in the membrane of the opposing organelles. Currently numerous tethering components have been identified which link the ER with multiple other organelles but knowledge of the factors linking the ER with peroxisomes is limited. Peroxisome-ER interplay is important because it is required for the biosynthesis of unsaturated fatty acids, ether-phospholipids and sterols with defects in these functions leading to severe diseases. Here, we characterize acyl-CoA binding domain protein 4 (ACBD4) as a tail-anchored peroxisomal membrane protein which interacts with the ER protein, vesicle-associated membrane protein-associated protein-B (VAPB) to promote peroxisome-ER associations.
机译:细胞细胞器如线粒体,过氧化物体和ER之间的合作对于各种重要和多样的代谢过程至关重要。有效的通信和代谢物交换需要细胞器之间的物理联系,主要是细胞器接触地点的形式。在这种接触地点,细胞器膜通过分子计量的作用引起近距离,其通常由锚定在相对细胞器的膜中的特定蛋白质对组成。目前已经鉴定了许多束缚组分,其将ER与多个其他细胞器联系起来,但有限地了解将ER连接的因素有限。过氧化物血清-ER的相互作用是重要的,因为不饱和脂肪酸的生物合成需要这些功能的不饱和脂肪酸,乙醚 - 磷脂和甾醇,这些功能缺陷导致严重疾病。这里,我们将酰基-CoA结合结构域蛋白4(ACBD4)表征为尾锚式过氧硅基膜蛋白,其与ER蛋白,囊泡相关膜蛋白相关蛋白-B(VAPB)相互作用以促进过氧化物酶机组合。

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