Palmitoylation by the DHHC protein Pfa4 regulates the ER exit of Chs3.

Palmitoylation by the DHHC protein Pfa4 regulates the ER exit of Chs3.
复制标题

DOI:
10.1083/jcb.200602049
复制
发表时间:
2006-07-03
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Conibear E
Conibear E
中科院分区:
其他
文献类型:
--
作者:
Lam KK;Davey M;Sun B;Roth AF;Davis NG;Conibear E

文献摘要

参考文献

被引文献

相似文献

酵母几丁质合成酶Chs3为多位膜蛋白运输提供了一个充分研究的范例。在这项研究中,高通量分析的酵母缺失收集确定了Pfa4,这是一个未知的蛋白质与蛋白酰基转移酶(PAT)的同源性,在Chs3运输的要求。PAT是蛋白质棕榈酰化的酶介质,最近才被发现,并且很少有底物被鉴定。我们发现Chs3是棕榈酰化的,这种修饰是Pfa4依赖性的,表明Pfa4确实是PAT。Chs3棕榈酰化是ER输出所需的,但不是与其专用的ER分子伴侣Chs7相互作用所需的。尽管如此,棕榈酰化和伴侣结合都需要防止Chs 3在ER的高分子量聚集体中积累。我们的数据表明,棕榈酰化是必要的Chs3达到出口竞争力的构象,并建议棕榈酰化的ER质量控制的多面体膜蛋白的可能性更普遍的作用。
The yeast chitin synthase Chs3 provides a well-studied paradigm for polytopic membrane protein trafficking. In this study, high-throughput analysis of the yeast deletion collection identifies a requirement for Pfa4, which is an uncharacterized protein with protein acyl transferase (PAT) homology, in Chs3 transport. PATs, which are the enzymatic mediators of protein palmitoylation, have only recently been discovered, and few substrates have been identified. We find that Chs3 is palmitoylated and that this modification is Pfa4-dependent, indicating that Pfa4 is indeed a PAT. Chs3 palmitoylation is required for ER export, but not for interaction with its dedicated ER chaperone, Chs7. Nonetheless, both palmitoylation and chaperone association are required to prevent the accumulation of Chs3 in high–molecular mass aggregates at the ER. Our data indicate that palmitoylation is necessary for Chs3 to attain an export-competent conformation, and suggest the possibility of a more general role for palmitoylation in the ER quality control of polytopic membrane proteins.
CHS7P是一种新蛋白,参与控制蛋白质从内质网的输出,该蛋白质专门从事酿酒酵母中几丁质合成的调节。
DOI: 10.1083/jcb.145.6.1153
发表时间: 1999-06-14
影响因子: 7.8
作者:
Trilla, J A;Duran, A;Roncero, C
通讯作者: Roncero, C
DOI: 10.1046/j.1432-1327.1998.2560419.x
发表时间: 1998-09-01
期刊: EUROPEAN JOURNAL OF BIOCHEMISTRY
影响因子: --
作者:
Cos, T;Ford, RA;Roncero, C
通讯作者: Roncero, C
DOI: 10.1074/jbc.m206573200
发表时间: 2002-10-25
影响因子: 4.8
作者:
Lobo, S;Greentree, WK;Deschenes, RJ
通讯作者: Deschenes, RJ
DOI: 10.1091/mbc.e04-06-0514
发表时间: 2004-11-01
影响因子: 3.3
作者:
Malkus, P;Graham, LA;Schekman, R
通讯作者: Schekman, R
DOI: 10.1073/pnas.1834246100
发表时间: 2003-09-02
影响因子: 11.1
作者:
Valdivia, RH;Schekman, R
通讯作者: Schekman, R