6PXP

Human Casein Kinase 1 delta Site 2 mutant (K171E)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.201 

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Literature

Casein kinase 1 dynamics underlie substrate selectivity and the PER2 circadian phosphoswitch.

Philpott, J.M., Narasimamurthy, R., Ricci, C.G., Freeberg, A.M., Hunt, S.R., Yee, L.E., Pelofsky, R.S., Tripathi, S., Virshup, D.M., Partch, C.L.

(2020) Elife 9

  • DOI: 10.7554/eLife.52343
  • Primary Citation of Related Structures:  
    6PXN, 6PXO, 6PXP

  • PubMed Abstract: 

    • 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 ...

    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.

    Organizational Affiliation: 

    Center for Circadian Biology, University of California San Diego, San Diego, United States.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Casein kinase I isoform deltaA, B294Homo sapiensMutation(s): 1 
Gene Names: CSNK1D, HCKID
EC: 2.7.11.1 (PDB Primary Data), 2.7.11.26 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P48730 (Homo sapiens)
Explore P48730 
Go to UniProtKB:  P48730
PHAROS:  P48730
GTEx:  ENSG00000141551
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.201 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.06α = 90
b = 130.35β = 113.47
c = 51.65γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
iMOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment  


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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2020-02-12
    Type: Initial release
  • Version 1.1: 2020-08-26
    Changes: Database references