7T4M image
Entry Detail
PDB ID:
7T4M
EMDB ID:
Keywords:
Title:
Structure of dodecameric unphosphorylated Pediculus humanus (Ph) PINK1 D357A mutant
Biological Source:
Host Organism:
PDB Version:
Deposition Date:
2021-12-10
Release Date:
2022-01-12
Method Details:
Experimental Method:
Resolution:
2.48 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Serine/threonine-protein kinase PINK1, putative
Mutations:D357A
Chain IDs:A, B, C, D, E, F, G, H, I, J, K, L
Chain Length:463
Number of Molecules:12
Biological Source:Pediculus humanus corporis
Ligand Molecules
Primary Citation

Abstact

Mutations in the protein kinase PINK1 lead to defects in mitophagy and cause autosomal recessive early onset Parkinson's disease1,2. PINK1 has many unique features that enable it to phosphorylate ubiquitin and the ubiquitin-like domain of Parkin3-9. Structural analysis of PINK1 from diverse insect species10-12 with and without ubiquitin provided snapshots of distinct structural states yet did not explain how PINK1 is activated. Here we elucidate the activation mechanism of PINK1 using crystallography and cryo-electron microscopy (cryo-EM). A crystal structure of unphosphorylated Pediculus humanus corporis (Ph; human body louse) PINK1 resolves an N-terminal helix, revealing the orientation of unphosphorylated yet active PINK1 on the mitochondria. We further provide a cryo-EM structure of a symmetric PhPINK1 dimer trapped during the process of trans-autophosphorylation, as well as a cryo-EM structure of phosphorylated PhPINK1 undergoing a conformational change to an active ubiquitin kinase state. Structures and phosphorylation studies further identify a role for regulatory PINK1 oxidation. Together, our research delineates the complete activation mechanism of PINK1, illuminates how PINK1 interacts with the mitochondrial outer membrane and reveals how PINK1 activity may be modulated by mitochondrial reactive oxygen species.

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Protein

Chemical

Disease

Primary Citation of related structures