Structure of a glomulin-RBX1-CUL1 complex: inhibition of a RING E3 ligase through masking of its E2-binding surface.
Structure of a glomulin-RBX1-CUL1 complex: inhibition of a RING E3 ligase through masking of its E2-binding surface.
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DOI:
10.1016/j.molcel.2012.05.044
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发表时间:
2012-08-10
期刊:
影响因子:
16
通讯作者:
Schulman, Brenda A.
中科院分区:
文献类型:
--
作者:
Duda, David M.;Olszewski, Jennifer L.;Tron, Adriana E.;Hammel, Michal;Lambert, Lester J.;Waddell, M. Brett;Mittag, Tanja;DeCaprio, James A.;Schulman, Brenda A.
The ~300 human Cullin-RING ligases (CRLs) are multisubunit E3s in which a RING protein, either RBX1 or RBX2, recruits an E2 to catalyze ubiquitination. RBX1-containing CRLs also can bind Glomulin (GLMN), which binds RBX1’s RING domain, regulates the RBX1-CUL1-containing SCFFBW7 complex, and is disrupted in the disease Glomuvenous Malformation. Here we report the crystal structure of a complex between GLMN, RBX1, and a fragment of CUL1. Structural and biochemical analyses reveal that GLMN adopts a HEAT-like repeat fold that tightly binds the E2-interacting surface of RBX1, inhibiting CRL-mediated chain formation by the E2 CDC34. The structure explains the basis for GLMN’s selectivity toward RBX1 over RBX2, and how disease-associated mutations disrupt GLMN-RBX1 interactions. Our study reveals a mechanism for RING E3 ligase regulation whereby an inhibitor blocks E2 access, and raises the possibility that other E3s are likewise controlled by cellular proteins that mask E2-binding surfaces to mediate inhibition.
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影响因子:
64.5
作者:
Duda, David M.;Borg, Laura A.;Scott, Daniel C.;Hunt, Harold W.;Hammel, Michal;Schulman, Brenda A.
通讯作者:
Schulman, Brenda A.
影响因子:
16
作者:
Hao, B;Zheng, N;Pavletich, NP
通讯作者:
Pavletich, NP
影响因子:
16
作者:
Hao, Bing;Oehlmann, Stephanie;Pavletich, Nikola P.
通讯作者:
Pavletich, Nikola P.
DOI:
10.1073/pnas.0510664103
发表时间:
2006-02-07
影响因子:
11.1
作者:
Gallagher, E;Gao, M;Karin, M
通讯作者:
Karin, M
DOI:
10.1073/pnas.1733908100
发表时间:
2003-08-19
影响因子:
11.1
作者:
Arai, T;Kasper, JS;DeCaprio, JA
通讯作者:
DeCaprio, JA