5T5X

High resolution structure of mouse Cryptochrome 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.171 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Formation of a repressive complex in the mammalian circadian clock is mediated by the secondary pocket of CRY1.

Michael, A.K.Fribourgh, J.L.Chelliah, Y.Sandate, C.R.Hura, G.L.Schneidman-Duhovny, D.Tripathi, S.M.Takahashi, J.S.Partch, C.L.

(2017) Proc Natl Acad Sci U S A 114: 1560-1565

  • DOI: 10.1073/pnas.1615310114
  • Primary Citation of Related Structures:  
    5T5X

  • PubMed Abstract: 
  • The basic helix-loop-helix PAS domain (bHLH-PAS) transcription factor CLOCK:BMAL1 (brain and muscle Arnt-like protein 1) sits at the core of the mammalian circadian transcription/translation feedback loop. Precise control of CLOCK:BMAL1 activity by coactivators and repressors establishes the ∼24-h periodicity of gene expression ...

    The basic helix-loop-helix PAS domain (bHLH-PAS) transcription factor CLOCK:BMAL1 (brain and muscle Arnt-like protein 1) sits at the core of the mammalian circadian transcription/translation feedback loop. Precise control of CLOCK:BMAL1 activity by coactivators and repressors establishes the ∼24-h periodicity of gene expression. Formation of a repressive complex, defined by the core clock proteins cryptochrome 1 (CRY1):CLOCK:BMAL1, plays an important role controlling the switch from repression to activation each day. Here we show that CRY1 binds directly to the PAS domain core of CLOCK:BMAL1, driven primarily by interaction with the CLOCK PAS-B domain. Integrative modeling and solution X-ray scattering studies unambiguously position a key loop of the CLOCK PAS-B domain in the secondary pocket of CRY1, analogous to the antenna chromophore-binding pocket of photolyase. CRY1 docks onto the transcription factor alongside the PAS domains, extending above the DNA-binding bHLH domain. Single point mutations at the interface on either CRY1 or CLOCK disrupt formation of the ternary complex, highlighting the importance of this interface for direct regulation of CLOCK:BMAL1 activity by CRY1.


    Organizational Affiliation

    Center for Circadian Biology, University of California, San Diego, CA 92161.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cryptochrome-1A491Mus musculusMutation(s): 0 
Gene Names: Cry1
UniProt
Find proteins for P97784 (Mus musculus)
Explore P97784 
Go to UniProtKB:  P97784
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download Ideal Coordinates CCD File 
B [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.171 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.63α = 71.62
b = 51.035β = 84.12
c = 54.175γ = 88.89
Software Package:
Software NamePurpose
PHENIXrefinement
iMOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM107069
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesCA189660

Revision History  (Full details and data files)

  • Version 1.0: 2017-02-08
    Type: Initial release
  • Version 1.1: 2017-02-15
    Changes: Database references
  • Version 1.2: 2017-02-22
    Changes: Database references
  • Version 1.3: 2017-09-06
    Changes: Author supporting evidence
  • Version 1.4: 2019-12-04
    Changes: Author supporting evidence