3LE4

Crystal structure of the DGCR8 dimerization domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.701 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.181 

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

  • 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 Microp ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Microprocessor complex subunit DGCR8
A
79Homo sapiensGene Names: DGCR8 (C22orf12, DGCRK6)
Find proteins for Q8WYQ5 (Homo sapiens)
Go to Gene View: DGCR8
Go to UniProtKB:  Q8WYQ5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.701 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.181 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 39.952α = 90.00
b = 39.952β = 90.00
c = 80.626γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHENIXrefinement
ADSCdata collection
HKL-2000data scaling
SHELXSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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