4KBG

almost closed conformation of the helicase core of the RNA helicase Hera


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.54 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Rearranging RNA structures at 75C? toward the molecular mechanism and physiological function of the thermus thermophilus DEAD-box helicase hera.

Klostermeier, D.

(2013) Biopolymers 99: 1137-1146

  • DOI: 10.1002/bip.22316
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • DEAD-box helicases catalyze the ATP-dependent destabilization of RNA duplexes. Hera is a DEAD-box helicase from Thermus thermophilus that consists of a helicase core, followed by a C-terminal extension comprising a dimerization domain and an RNA-bind ...

    DEAD-box helicases catalyze the ATP-dependent destabilization of RNA duplexes. Hera is a DEAD-box helicase from Thermus thermophilus that consists of a helicase core, followed by a C-terminal extension comprising a dimerization domain and an RNA-binding domain. The combined structural information on individual Hera domains provides a molecular model of the Hera dimer. The modular architecture with flexible connections between individual domains affords different relative orientations of the RBD relative to the Hera helicase core, and of the two helicase cores within the dimer. Presumably, domain movements are intimately linked to RNA binding, to the interplay of the RBD and the helicase core, and to RNA unwinding, and may impact on the functional cooperation of the two helicase cores in RNA unwinding. The in vivo function of Hera is unknown. The Hera RBD recognizes two distinct elements in the RNA substrate, a single-stranded and a structured region. The helicase core then unwinds an adjacent RNA duplex in an ATP-dependent reaction. Overall, this mode of action is reminiscent of DEAD-box proteins that act as general RNA chaperones. This review summarizes the current knowledge on Hera structure and function, and discusses a possible role of Hera in the Thermus thermophilus cold-shock response.


    Organizational Affiliation

    Institute for Physical Chemistry, University of Muenster, Corrensstrasse 30, D-48149, Muenster, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Heat resistant RNA dependent ATPase
A, B
365Thermus thermophilus (strain HB27 / ATCC BAA-163 / DSM 7039)Mutation(s): 0 
Find proteins for Q72GF3 (Thermus thermophilus (strain HB27 / ATCC BAA-163 / DSM 7039))
Go to UniProtKB:  Q72GF3
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.54 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.186 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 127.200α = 90.00
b = 128.702β = 90.00
c = 101.761γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
SADABSdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-07-31
    Type: Initial release
  • Version 1.1: 2013-12-25
    Type: Database references
  • Version 1.2: 2017-11-15
    Type: Refinement description