6PXN image
Deposition Date 2019-07-26
Release Date 2020-02-12
Last Version Date 2023-10-11
Entry Detail
PDB ID:
6PXN
Title:
Human Casein Kinase 1 delta Tau mutant (R178C)
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
1.55 Å
R-Value Free:
0.20
R-Value Work:
0.17
R-Value Observed:
0.17
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Casein kinase I isoform delta
Gene (Uniprot):CSNK1D
Mutations:R178C
Chain IDs:A, B
Chain Length:415
Number of Molecules:2
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Casein kinase 1 dynamics underlie substrate selectivity and the PER2 circadian phosphoswitch.
Elife 9 ? ? (2020)
PMID: 32043967 DOI: 10.7554/eLife.52343

Abstact

Post-translational control of PERIOD stability by Casein Kinase 1δ and ε (CK1) plays a key regulatory role in metazoan circadian rhythms. Despite the deep evolutionary conservation of CK1 in eukaryotes, little is known about its regulation and the factors that influence substrate selectivity on functionally antagonistic sites in PERIOD that directly control circadian period. Here we describe a molecular switch involving a highly conserved anion binding site in CK1. This switch controls conformation of the kinase activation loop and determines which sites on mammalian PER2 are preferentially phosphorylated, thereby directly regulating PER2 stability. Integrated experimental and computational studies shed light on the allosteric linkage between two anion binding sites that dynamically regulate kinase activity. We show that period-altering kinase mutations from humans to Drosophila differentially modulate this activation loop switch to elicit predictable changes in PER2 stability, providing a foundation to understand and further manipulate CK1 regulation of circadian rhythms.

Legend

Protein

Chemical

Disease

Primary Citation of related structures