8IKM

Trans complex of phospho parkin

Summary for 8IKM

• Entry DOI: 10.2210/pdb8ikm/pdb
• Descriptor: E3 ubiquitin-protein ligase parkin, Ubiquitin, ZINC ION, ... (7 entities in total)
• Functional Keywords: e3 ligase, ligase
• Biological source: Homo sapiens (human); More
• Total number of polymer chains: 3
• Total formula weight: 52792.78

Authors

Lenka, D.R.,Kumar, A. (deposition date: 2023-02-28, release date: 2024-09-11, Last modification date: 2024-10-09)

Primary citation

Lenka, D.R.,Dahe, S.V.,Antico, O.,Sahoo, P.,Prescott, A.R.,Muqit, M.M.K.,Kumar, A.
Additional feedforward mechanism of Parkin activation via binding of phospho-UBL and RING0 in trans.
Elife, 13:-, 2024

PubMed Abstract: Loss-of-function Parkin mutations lead to early-onset of Parkinson's disease. Parkin is an auto-inhibited ubiquitin E3 ligase activated by dual phosphorylation of its ubiquitin-like (Ubl) domain and ubiquitin by the PINK1 kinase. Herein, we demonstrate a competitive binding of the phospho-Ubl and RING2 domains towards the RING0 domain, which regulates Parkin activity. We show that phosphorylated Parkin can complex with native Parkin, leading to the activation of autoinhibited native Parkin in . Furthermore, we show that the activator element (ACT) of Parkin is required to maintain the enzyme kinetics, and the removal of ACT slows the enzyme catalysis. We also demonstrate that ACT can activate Parkin in but less efficiently than when present in the molecule. Furthermore, the crystal structure reveals a donor ubiquitin binding pocket in the linker connecting REP and RING2, which plays a crucial role in Parkin activity.

PubMed: 39221915
DOI: 10.7554/eLife.96699

Experimental method

X-RAY DIFFRACTION (1.92 Å)