4DJ3

Unwinding the Differences of the Mammalian PERIOD Clock Proteins from Crystal Structure to Cellular Function


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Unwinding the differences of the mammalian PERIOD clock proteins from crystal structure to cellular function.

Kucera, N.Schmalen, I.Hennig, S.Ollinger, R.Strauss, H.M.Grudziecki, A.Wieczorek, C.Kramer, A.Wolf, E.

(2012) Proc.Natl.Acad.Sci.USA 109: 3311-3316

  • DOI: 10.1073/pnas.1113280109
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The three PERIOD homologues mPER1, mPER2, and mPER3 constitute central components of the mammalian circadian clock. They contain two PAS (PER-ARNT-SIM) domains (PAS-A and PAS-B), which mediate homo- and heterodimeric mPER-mPER interactions as well as ...

    The three PERIOD homologues mPER1, mPER2, and mPER3 constitute central components of the mammalian circadian clock. They contain two PAS (PER-ARNT-SIM) domains (PAS-A and PAS-B), which mediate homo- and heterodimeric mPER-mPER interactions as well as interactions with transcription factors and kinases. Here we present crystal structures of PAS domain fragments of mPER1 and mPER3 and compare them with the previously reported mPER2 structure. The structures reveal homodimers, which are mediated by interactions of the PAS-B β-sheet surface including a highly conserved tryptophan (Trp448(mPER1), Trp419(mPER2), Trp359(mPER3)). mPER1 homodimers are additionally stabilized by interactions between the PAS-A domains and mPER3 homodimers by an N-terminal region including a predicted helix-loop-helix motive. We have verified the existence of these homodimer interfaces in solution and inside cells using analytical gel filtration and luciferase complementation assays and quantified their contributions to homodimer stability by analytical ultracentrifugation. We also show by fluorescence recovery after photobleaching analyses that destabilization of the PAS-B/tryptophan dimer interface leads to a faster mobility of mPER2 containing complexes in human U2OS cells. Our study reveals structural and quantitative differences between the homodimeric interactions of the three mouse PERIOD homologues, which are likely to contribute to their distinct clock functions.


    Organizational Affiliation

    Max Planck Institute of Molecular Physiology, Department of Structural Biology, Otto-Hahn-Strasse 11, 44227 Dortmund, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Period circadian protein homolog 3
A, B
317Mus musculusMutation(s): 0 
Gene Names: Per3
Find proteins for O70361 (Mus musculus)
Go to UniProtKB:  O70361
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.213 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 62.650α = 90.00
b = 78.640β = 97.63
c = 67.170γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
MOLREPphasing
XDSdata reduction
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-02-29
    Type: Initial release
  • Version 1.1: 2012-03-14
    Type: Database references