3RTY

Structure of an Enclosed Dimer Formed by The Drosophila Period Protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.239 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure of an enclosed dimer formed by the Drosophila period protein.

King, H.A.Hoelz, A.Crane, B.R.Young, M.W.

(2011) J.Mol.Biol. 413: 561-572

  • DOI: 10.1016/j.jmb.2011.08.048

  • PubMed Abstract: 
  • Period (PER) is the major transcription inhibitor in metazoan circadian clocks and lies at the center of several feedback loops that regulate gene expression. Dimerization of Drosophila PER influences nuclear translocation, repressor activity, and be ...

    Period (PER) is the major transcription inhibitor in metazoan circadian clocks and lies at the center of several feedback loops that regulate gene expression. Dimerization of Drosophila PER influences nuclear translocation, repressor activity, and behavioral rhythms. The structure of a central, 346-residue PER fragment reveals two associated PAS (Per-Arnt-Sim) domains followed by a protruding α-helical extension (αF). A closed, pseudo-symmetric dimer forms from a cross handshake interaction of the N-terminal PAS domain with αF of the opposing subunit. Strikingly, a shift of αF against the PAS β-sheet generates two alternative subunit interfaces in the dimer. Taken together with a previously reported PER structure in which αF extends, these data indicate that αF unlatches to switch association of PER with itself to its partner Timeless. The variable positions of the αF helix provide snapshots of a helix dissociation mechanism that has relevance to other PAS protein systems. Conservation of PER interaction residues among a family of PAS-AB-containing transcription factors suggests that contacts mediating closed PAS-AB dimers serve a general function.


    Organizational Affiliation

    Laboratory of Genetics, The Rockefeller University, New York, NY 10065, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Period circadian protein
A, B, C, D, E, F, G, H
339Drosophila melanogasterMutation(s): 0 
Gene Names: per
Find proteins for P07663 (Drosophila melanogaster)
Go to UniProtKB:  P07663
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DTT
Query on DTT

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
2,3-DIHYDROXY-1,4-DITHIOBUTANE
1,4-DITHIOTHREITOL
C4 H10 O2 S2
VHJLVAABSRFDPM-IMJSIDKUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.239 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 60.414α = 88.19
b = 94.697β = 89.63
c = 141.030γ = 89.87
Software Package:
Software NamePurpose
AMoREphasing
HKL-2000data scaling
CNSrefinement
HKL-2000data collection
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-12-21
    Type: Initial release