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DPCD is a regulator of R2TP in ciliogenesis initiation through Akt signaling
Cell Reports ( IF 7.5 ) Pub Date : 2024-02-01 , DOI: 10.1016/j.celrep.2024.113713
Yu-Qian Mao 1 , Thiago V Seraphim 2 , Yimei Wan 1 , Ruikai Wu 1 , Etienne Coyaud 3 , Muhammad Bin Munim 1 , Antonio Mollica 1 , Estelle Laurent 3 , Mohan Babu 4 , Vito Mennella 5 , Brian Raught 6 , Walid A Houry 7
Affiliation  

R2TP is a chaperone complex consisting of the AAA+ ATPases RUVBL1 and RUVBL2, as well as RPAP3 and PIH1D1 proteins. R2TP is responsible for the assembly of macromolecular complexes mainly acting through different adaptors. Using proximity-labeling mass spectrometry, we identified deleted in primary ciliary dyskinesia (DPCD) as an adaptor of R2TP. Here, we demonstrate that R2TP-DPCD influences ciliogenesis initiation through a unique mechanism by interaction with Akt kinase to regulate its phosphorylation levels rather than its stability. We further show that DPCD is a heart-shaped monomeric protein with two domains. A highly conserved region in the cysteine- and histidine-rich domains-containing proteins and SGT1 (CS) domain of DPCD interacts with the RUVBL2 DII domain with high affinity to form a stable R2TP-DPCD complex both and . Considering that DPCD is one among several CS-domain-containing proteins found to associate with RUVBL1/2, we propose that RUVBL1/2 are CS-domain-binding proteins that regulate complex assembly and downstream signaling.

中文翻译:


DPCD 是通过 Akt 信号转导启动纤毛发生中 R2TP 的调节因子



R2TP 是一种伴侣复合物,由 AAA+ ATP 酶 RUVBL1 和 RUVBL2 以及 RPAP3 和 PIH1D1 蛋白组成。R2TP 负责主要通过不同接头作用的大分子复合物的组装。使用邻近标记质谱法,我们确定了原发性纤毛运动障碍 (DPCD) 中缺失是 R2TP 的接头蛋白。在这里,我们证明 R2TP-DPCD 通过与 Akt 激酶相互作用来调节其磷酸化水平而不是其稳定性,从而通过独特的机制影响纤毛发生启动。我们进一步表明 DPCD 是一种具有两个结构域的心形单体蛋白。在包含半胱氨酸和组氨酸的蛋白质结构域中,一个高度保守的区域以及 DPCD 的 SGT1 (CS) 结构域以高亲和力与 RUVBL2 DII 结构域相互作用,形成稳定的 R2TP-DPCD 复合物。考虑到 DPCD 是发现与 RUVBL1/2 相关的几种包含 CS 结构域的蛋白之一,我们提出 RUVBL1/2 是调节复合物组装和下游信号传导的 CS 结构域结合蛋白。
更新日期:2024-02-01
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