1S2M

Crystal Structure of the DEAD box protein Dhh1p


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure and functional analysis of DEAD-box protein Dhh1p.

Cheng, Z.Coller, J.Parker, R.Song, H.

(2005) Rna 11: 1258-1270

  • DOI: 10.1261/rna.2920905

  • PubMed Abstract: 
  • The control of mRNA translation and degradation are critical for proper gene expression. A key regulator of both translation and degradation is Dhh1p, which is a DEAD-box protein, and functions both to repress translation and enhance decapping. We de ...

    The control of mRNA translation and degradation are critical for proper gene expression. A key regulator of both translation and degradation is Dhh1p, which is a DEAD-box protein, and functions both to repress translation and enhance decapping. We describe the crystal structure of the N- and C-terminal truncated Dhh1p (tDhh1p) determined at 2.1 A resolution. This reveals that, like other DEAD-box proteins, tDhh1p contains two RecA-like domains, although with a unique arrangement. In contrast to eIF4A and mjDEAD, in which no motif interactions exist, in Dhh1p, motif V interacts with motif I and the Q-motif, thereby linking the two domains together. Electrostatic potential mapping combined with mutagenesis reveals that motifs I, V, and VI are involved in RNA binding. In addition, trypsin digestion of tDhh1p suggests that ATP binding enhances an RNA-induced conformational change. Interestingly, some mutations located in the conserved motifs and at the interface between the two Dhh1 domains confer dominant negative phenotypes in vivo and disrupt the conformational switch in vitro. This suggests that this conformational change is required in Dhh1 function and identifies key residues involved in that transition.


    Organizational Affiliation

    Laboratory of Macromolecular Structure, Institute of Molecular and Cell Biology, Proteos, Singapore 138673.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative ATP-dependent RNA helicase DHH1
A
400Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: DHH1
EC: 3.6.4.13
Find proteins for P39517 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P39517
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.200 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 48.210α = 90.00
b = 80.410β = 100.57
c = 54.824γ = 90.00
Software Package:
Software NamePurpose
SHARPphasing
CCP4data scaling
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2004-01-09 
  • Released Date: 2005-03-01 
  • Deposition Author(s): Cheng, Z., Song, H.

Revision History 

  • Version 1.0: 2005-03-01
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance