Palmitoylation regulates the intracellular trafficking and stability of c-Met.

Palmitoylation regulates the intracellular trafficking and stability of c-Met.
复制标题

DOI:
10.18632/oncotarget.8706
复制
发表时间:
2016-05-31
期刊:
影响因子:
--
通讯作者:
Cardelli JA
Cardelli JA
中科院分区:
其他
文献类型:
--
作者:
Coleman DT;Gray AL;Kridel SJ;Cardelli JA

文献摘要

参考文献

被引文献

相似文献

c-Met 是一种受体酪氨酸激酶,其活性可以促进参与组织发育和癌症进展的有丝分裂和运动表型。在此,我们报告了第一个证据,证明 c-Met 是棕榈酰化的,并且棕榈酰化有利于其运输和稳定性。抑制棕榈酰化可降低多种癌细胞系转录后 c-Met 的表达。使用表面生物素化、共聚焦显微镜和代谢标记,我们确定棕榈酰化的抑制会降低新合成的 c-Met 的稳定性并导致在高尔基体处积累。酰基生物素交换和基于点击化学的棕榈酸酯标记表明 c-Met β 链已棕榈酰化,定点诱变揭示了两个可能的半胱氨酸棕榈酰化位点。此外,通过监测 c-Met 生物合成和运输过程中的棕榈酰化动力学,我们发现,在 170 kDa c-Met 前体裂解为成熟 140 kDa 形式之前,稳定的棕榈酰化发生在内质网中。我们的数据表明棕榈酰化是从高尔基体出口运输到质膜所必需的。这些发现介绍了棕榈酰化作为 c-Met 的关键修饰,为 c-Met 驱动的癌症提供了新的治疗靶点。
c-Met is a receptor tyrosine kinase whose activity can promote both mitogenic and motogenic phenotypes involved in tissue development and cancer progression. Herein, we report the first evidence that c-Met is palmitoylated and that palmitoylation facilitates its trafficking and stability. Inhibition of palmitoylation reduced the expression of c-Met in multiple cancer cell lines post-transcriptionally. Using surface biotinylation, confocal microscopy, and metabolic labeling we determined that inhibition of palmitoylation reduces the stability of newly synthesized c-Met and causes accumulation at the Golgi. Acyl-biotin exchange and click chemistry-based palmitate labeling indicated the c-Met β-chain is palmitoylated, and site-directed mutagenesis revealed two likely cysteine palmitoylation sites. Moreover, by monitoring palmitoylation kinetics during the biosynthesis and trafficking of c-Met, we revealed that stable palmitoylation occurs in the endoplasmic reticulum prior to cleavage of the 170 kDa c-Met precursor to the mature 140 kDa form. Our data suggest palmitoylation is required for egress from the Golgi for transport to the plasma membrane. These findings introduce palmitoylation as a critical modification of c-Met, providing a novel therapeutic target for c-Met-driven cancers.
DOI: 10.1021/ar200063v
发表时间: 2011-09-20
影响因子: 18.3
作者:
Hang, Howard C.;Wilson, John P.;Charron, Guillaume
通讯作者: Charron, Guillaume
DOI: 10.1038/labinvest.2008.97
发表时间: 2008-12
期刊: Laboratory investigation; a journal of technical methods and pathology
影响因子: --
作者:
通讯作者: --
DOI: 10.1083/jcb.200901145
发表时间: 2009-05-18
期刊: The Journal of cell biology
影响因子: --
作者:
Klemm RW;Ejsing CS;Surma MA;Kaiser HJ;Gerl MJ;Sampaio JL;de Robillard Q;Ferguson C;Proszynski TJ;Shevchenko A;Simons K
通讯作者: Simons K
DOI: 10.1038/sj.onc.1204475
发表时间: 2001-05-17
期刊: ONCOGENE
影响因子: 8
作者:
Hammond, DE;Urbé, S;Clague, MJ
通讯作者: Clague, MJ
DOI: 10.1210/me.2011-1208
发表时间: 2012-05-01
影响因子: --
作者:
La Rosa, Piergiorgio;Pesiri, Valeria;Acconcia, Filippo
通讯作者: Acconcia, Filippo