Recognition of an Ala-rich C-degron by the E3 ligase Pirh2.
Recognition of an Ala-rich C-degron by the E3 ligase Pirh2.
复制标题
DOI:
10.1038/s41467-023-38173-6
复制
发表时间:
2023-04-29
影响因子:
16.6
通讯作者:
Dong, Cheng
中科院分区:
文献类型:
--
作者:
Wang, Xiaolu;Li, Yao;Yan, Xiaojie;Yang, Qing;Zhang, Bing;Zhang, Ying;Yuan, Xinxin;Jiang, Chenhao;Chen, Dongxing;Liu, Quanyan;Liu, Tong;Mi, Wenyi;Yu, Ying;Dong, Cheng
The ribosome-associated quality-control (RQC) pathway degrades aberrant nascent polypeptides arising from ribosome stalling during translation. In mammals, the E3 ligase Pirh2 mediates the degradation of aberrant nascent polypeptides by targeting the C-terminal polyalanine degrons (polyAla/C-degrons). Here, we present the crystal structure of Pirh2 bound to the polyAla/C-degron, which shows that the N-terminal domain and the RING domain of Pirh2 form a narrow groove encapsulating the alanine residues of the polyAla/C-degron. Affinity measurements in vitro and global protein stability assays in cells further demonstrate that Pirh2 recognizes a C-terminal A/S-X-A-A motif for substrate degradation. Taken together, our study provides the molecular basis underlying polyAla/C-degron recognition by Pirh2 and expands the substrate recognition spectrum of Pirh2. Incompletely synthesized nascent polypeptides resulting from ribosome stalling during translation are under surveillance by ribosome-associated quality control. Here, the authors report the molecular mechanism by which the E3 ligase Pirh2 targets the polyalanine tail of aberrant nascent chains for degradation via the C-degron pathway.
登录
查看更多内容
影响因子:
16
作者:
Filbeck S;Cerullo F;Paternoga H;Tsaprailis G;Joazeiro CAP;Pfeffer S
通讯作者:
Pfeffer S
影响因子:
6
作者:
Daks, Alexandra;Fedorova, Olga;Parfenyev, Sergey;Nevzorov, Ivan;Shuvalov, Oleg;Barlev, Nickolai A.
通讯作者:
Barlev, Nickolai A.
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
16
作者:
Juszkiewicz S;Chandrasekaran V;Lin Z;Kraatz S;Ramakrishnan V;Hegde RS
通讯作者:
Hegde RS
影响因子:
16
作者:
Juszkiewicz, Szymon;Speldewinde, Shaun H.;Hegde, Ramanujan S.
通讯作者:
Hegde, Ramanujan S.