8DJH

Ternary complex of SUMO1 with a phosphomimetic SIM of PML and zinc

8DJH の概要

• エントリーDOI: 10.2210/pdb8djh/pdb
• 関連するPDBエントリー: 6UYO 6UYP 6UYQ 6UYR 6UYS 6UYT 6UYU 6UYV 6UYX 6UYY 6UYZ 6V7P 6V7Q 6V7R 6V7S
• 分子名称: Small ubiquitin-related modifier 1, PML 4SD, ZINC ION, ... (4 entities in total)
• 機能のキーワード: sumo1, pml nuclear bodies, zinc, auto-inhibition, daxx, nuclear protein
• 由来する生物種: Homo sapiens (human); 詳細
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 14394.00

構造登録者

Lussier-Price, M.,Wahba, H.M.,Mascle, X.H.,Cappadocia, L.,Bourdeau, V.,Gagnon, C.,Igelmann, S.,Sakaguchi, K.,Ferbeyre, G.,Omichinski, J.G. (登録日: 2022-06-30, 公開日: 2022-08-10, 最終更新日: 2023-10-18)

主引用文献

Lussier-Price, M.,Wahba, H.M.,Mascle, X.H.,Cappadocia, L.,Bourdeau, V.,Gagnon, C.,Igelmann, S.,Sakaguchi, K.,Ferbeyre, G.,Omichinski, J.G.
Zinc controls PML nuclear body formation through regulation of a paralog specific auto-inhibition in SUMO1.
Nucleic Acids Res., 50:8331-8348, 2022

PubMed Abstract: SUMO proteins are important regulators of many key cellular functions in part through their ability to form interactions with other proteins containing SUMO interacting motifs (SIMs). One characteristic feature of all SUMO proteins is the presence of a highly divergent intrinsically disordered region at their N-terminus. In this study, we examine the role of this N-terminal region of SUMO proteins in SUMO-SIM interactions required for the formation of nuclear bodies by the promyelocytic leukemia (PML) protein (PML-NBs). We demonstrate that the N-terminal region of SUMO1 functions in a paralog specific manner as an auto-inhibition domain by blocking its binding to the phosphorylated SIMs of PML and Daxx. Interestingly, we find that this auto-inhibition in SUMO1 is relieved by zinc, and structurally show that zinc stabilizes the complex between SUMO1 and a phospho-mimetic form of the SIM of PML. In addition, we demonstrate that increasing cellular zinc levels enhances PML-NB formation in senescent cells. Taken together, these results provide important insights into a paralog specific function of SUMO1, and suggest that zinc levels could play a crucial role in regulating SUMO1-SIM interactions required for PML-NB formation and function.

PubMed: 35871297
DOI: 10.1093/nar/gkac620

実験手法

X-RAY DIFFRACTION (1.77 Å)