4U8H

Crystal Structure of Mammalian Period-Cryptochrome Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular assembly of the period-cryptochrome circadian transcriptional repressor complex.

Nangle, S.N.Rosensweig, C.Koike, N.Tei, H.Takahashi, J.S.Green, C.B.Zheng, N.

(2014) Elife 3: e03674-e03674

  • DOI: 10.7554/eLife.03674
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The mammalian circadian clock is driven by a transcriptional-translational feedback loop, which produces robust 24-hr rhythms. Proper oscillation of the clock depends on the complex formation and periodic turnover of the Period and Cryptochrome prote ...

    The mammalian circadian clock is driven by a transcriptional-translational feedback loop, which produces robust 24-hr rhythms. Proper oscillation of the clock depends on the complex formation and periodic turnover of the Period and Cryptochrome proteins, which together inhibit their own transcriptional activator complex, CLOCK-BMAL1. We determined the crystal structure of the CRY-binding domain (CBD) of PER2 in complex with CRY2 at 2.8 Å resolution. PER2-CBD adopts a highly extended conformation, embracing CRY2 with a sinuous binding mode. Its N-terminal end tucks into CRY adjacent to a large pocket critical for CLOCK-BMAL1 binding, while its C-terminal half flanks the CRY2 C-terminal helix and sterically hinders the recognition of CRY2 by the FBXL3 ubiquitin ligase. Unexpectedly, a strictly conserved intermolecular zinc finger, whose integrity is important for clock rhythmicity, further stabilizes the complex. Our structure-guided analyses show that these interspersed CRY-interacting regions represent multiple functional modules of PERs at the CRY-binding interface.


    Organizational Affiliation

    Department of Pharmacology, University of Washington, Seattle, United States Howard Hughes Medical Institute, University of Washington, Seattle, United States nzheng@u.washington.edu.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cryptochrome-2
A, C
510Mus musculusMutation(s): 0 
Gene Names: Cry2Kiaa0658
Find proteins for Q9R194 (Mus musculus)
Go to UniProtKB:  Q9R194

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Period circadian protein homolog 2
B, D
121Mus musculusMutation(s): 0 
Gene Names: Per2
Find proteins for O54943 (Mus musculus)
Go to UniProtKB:  O54943
NIH Common Fund Data Resources
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download CCD File 
A, D
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.209 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 97.675α = 90
b = 97.675β = 90
c = 163.213γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesR01-CA107134
Howard Hughes Medical Institute (HHMI)United States--
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesT32-GM007750

Revision History 

  • Version 1.0: 2014-10-01
    Type: Initial release
  • Version 1.1: 2017-09-20
    Changes: Author supporting evidence, Derived calculations, Other, Source and taxonomy
  • Version 1.2: 2019-11-20
    Changes: Author supporting evidence