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通过TMEM251对GNPTAB的调控进行分子洞察

Xi Yang^1,2, Balraj Doray³, Varsha Venkatarangan¹

¹Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA.

bioRxiv : the preprint server for biology

|December 16, 2024

概括

TMEM251蛋白稳定了GlcNAc-1-phosphotransferase (GNPT),确保其在曼诺-6-酸盐 (M6P) 途径中的正确功能. 这可以防止溶解体酶误导和降解,保持细胞健康.

科学领域:

细胞生物学细胞生物学
分子生物学分子生物学
生物化学生物化学

背景情况:

溶解体酶通过脊椎动物的曼诺-6-酸盐 (M6P) 途径被贩运.
戈尔吉蛋白TMEM251在调节GlcNAc-1-phosphotransferase (GNPT) 水平中的作用是已知的,但其确切的功能尚不清楚.

研究的目的:

阐明TMEM251在曼诺-6-酸盐 (M6P) 途径中的分子功能.
了解TMEM251如何调节GlcNAc-1-phosphotransferase (GNPT) 的活性和局部化.

主要方法:

研究了TMEM251在GNPT稳定性,Site-1-Protease (S1P) 分裂以及酶活性中的作用.
利用氨酸突变生成来识别TMEM251.1.中的关键功能动机.
研究了TMEM251,GOLPH3和逆转激素复合体之间的相互作用.

主要成果:

TMEM251对于GNPT稳定性,Site-1-Protease (S1P) 裂变和酶活性至关重要.
TMEM251增强了GNPT的裂变,并防止了它的溶酶体错位和降解.
TMEM251与GOLPH3和逆转激素相互作用,将TMEM251-GNPT复合物固定在戈尔吉.

结论:

TMEM251在维护曼-6-酸盐 (M6P) 途径的忠实性方面发挥着至关重要的作用.
TMEM251通过稳定它,促进裂变,并将其保留在Golgi中,确保了GNPT的适当功能.
TMEM251与GOLPH3的相互作用,由FXXR动机介导,对其功能至关重要.

关键词:

国民国民生产总值 (GNPT) 是一个.戈尔吉戈尔吉是一座古老的城市.在MLII中,我们可以看到MLII.MLVMLV 在线观看在线观看粘脂化症的发生 TMEM251/LYSET/GCAF 在线提供 lysosome 溶解酶体是如何形成的

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