The Saccharomyces cerevisiae ABC subfamily D transporter Pxa1/Pxa2p co-imports CoASH into the peroxisome.

The Saccharomyces cerevisiae ABC subfamily D transporter Pxa1/Pxa2p co-imports CoASH into the peroxisome.
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酿酒酵母 ABC 亚科 D 转运蛋白 Pxa1/Pxa2p 将 CoASH 共同导入过氧化物酶体。

DOI:
10.1002/1873-3468.13974
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发表时间:
2021
期刊:
影响因子:
3.5
通讯作者:
Van Roermund CWT
Van Roermund CWT
中科院分区:
生物学3区
文献类型:
--
作者:
Van Roermund CWT

文献摘要

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ATP 结合盒 (ABC) 亚家族 D 转运蛋白对于将脂肪酸和其他 β 氧化底物摄取到过氧化物酶体中非常重要。遗传和生化证据表明,转运蛋白接受脂肪酰辅酶 A,脂肪酰辅酶 A 在转运周期中被裂解,然后在过氧化物酶体腔中重新酯化。然而,尚不清楚游离辅酶 A (CoA) 是在过氧化物酶体内部还是外部释放。在这里,我们使用酿酒酵母和分离的过氧化物酶体来证明游离 CoA 在过氧化物酶体腔中释放。因此,ABC 亚家族 D 转运蛋白为游离 CoA 提供了一条输入途径,控制过氧化物酶体 CoA 稳态并根据细胞的需求调节代谢。
ATP‐binding cassette (ABC) subfamily D transporters are important for the uptake of fatty acids and other beta‐oxidation substrates into peroxisomes. Genetic and biochemical evidence indicates that the transporters accept fatty acyl‐coenzyme A that is cleaved during the transport cycle and then re‐esterified in the peroxisomal lumen. However, it is not known whether free coenzyme A (CoA) is released inside or outside the peroxisome. Here we have usedSaccharomyces cerevisiaeand isolated peroxisomes to demonstrate that free CoA is released in the peroxisomal lumen. Thus, ABC subfamily D transporter provide an import pathway for free CoA that controls peroxisomal CoA homeostasis and tunes metabolism according to the cell’s demands.