3LE4

Crystal structure of the DGCR8 dimerization domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.182 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of the dimerization domain of DiGeorge Critical Region 8

Senturia, R.Faller, M.Yin, S.Loo, J.A.Cascio, D.Sawaya, M.R.Hwang, D.Clubb, R.T.Guo, F.

(2010) Protein Sci 19: 1354-1365

  • DOI: 10.1002/pro.414
  • Primary Citation of Related Structures:  
    3LE4

  • PubMed Abstract: 
  • Maturation of microRNAs (miRNAs, approximately 22nt) from long primary transcripts [primary miRNAs (pri-miRNAs)] is regulated during development and is altered in diseases such as cancer. The first processing step is a cleavage mediated by the Microprocessor complex containing the Drosha nuclease and the RNA-binding protein DiGeorge critical region 8 (DGCR8) ...

    Maturation of microRNAs (miRNAs, approximately 22nt) from long primary transcripts [primary miRNAs (pri-miRNAs)] is regulated during development and is altered in diseases such as cancer. The first processing step is a cleavage mediated by the Microprocessor complex containing the Drosha nuclease and the RNA-binding protein DiGeorge critical region 8 (DGCR8). We previously reported that dimeric DGCR8 binds heme and that the heme-bound DGCR8 is more active than the heme-free form. Here, we identified a conserved dimerization domain in DGCR8. Our crystal structure of this domain (residues 298-352) at 1.7 A resolution demonstrates a previously unknown use of a WW motif as a platform for extensive dimerization interactions. The dimerization domain of DGCR8 is embedded in an independently folded heme-binding domain and directly contributes to association with heme. Heme-binding-deficient DGCR8 mutants have reduced pri-miRNA processing activity in vitro. Our study provides structural and biochemical bases for understanding how dimerization and heme binding of DGCR8 may contribute to regulation of miRNA biogenesis.


    Organizational Affiliation

    Department of Biological Chemistry in David Geffen School of Medicine, University of California, Los Angeles, California 90095, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Microprocessor complex subunit DGCR8A79Homo sapiensMutation(s): 0 
Gene Names: DGCR8C22orf12DGCRK6LP4941
UniProt & NIH Common Fund Data Resources
Find proteins for Q8WYQ5 (Homo sapiens)
Explore Q8WYQ5 
Go to UniProtKB:  Q8WYQ5
PHAROS:  Q8WYQ5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.182 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.952α = 90
b = 39.952β = 90
c = 80.626γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
SHELXSphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-07-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance