3ADJ

Structure of Arabidopsis HYL1 and its molecular implications for miRNA processing


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.322 
  • R-Value Work: 0.255 
  • R-Value Observed: 0.261 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of arabidopsis HYPONASTIC LEAVES1 and its molecular implications for miRNA processing

Yang, S.W.Chen, H.Y.Yang, J.Machida, S.Chua, N.H.Yuan, Y.A.

(2010) Structure 18: 594-605

  • DOI: 10.1016/j.str.2010.02.006
  • Primary Citation of Related Structures:  
    3ADG, 3ADI, 3ADJ, 3ADL

  • PubMed Abstract: 
  • The Arabidopsis HYPONASTIC LEAVES1 (HYL1) is a double-stranded RNA-binding protein that forms a complex with DICER-LIKE1 (DCL1) and SERRATE to facilitate processing of primary miRNAs into microRNAs (miRNAs). However, the structural mechanisms of miRN ...

    The Arabidopsis HYPONASTIC LEAVES1 (HYL1) is a double-stranded RNA-binding protein that forms a complex with DICER-LIKE1 (DCL1) and SERRATE to facilitate processing of primary miRNAs into microRNAs (miRNAs). However, the structural mechanisms of miRNA maturation by this complex are poorly understood. Here, we present the crystal structures of double-stranded RNA binding domains (dsRBD1 and dsRBD2) of HYL1 and HYL1 dsRBD1 (HR1)/dsRNA complex as well as human TRBP2 dsRBD2 (TR2)/dsRNA complex for comparison analysis. Structural and functional study demonstrates that both HR1 and TR2 are canonical dsRBDs for dsRNA binding, whereas HR2 of HYL1 is a non-canonical dsRBD harboring a putative dimerization interface. Domain swapping within the context of HYL1 demonstrates that TR2 can supplant the function of HR1 in vitro and in vivo. Further biochemical analyses suggest that HYL1 probably binds to the miRNA/miRNA( *) region of precursors as a dimer mediated by HR2.


    Organizational Affiliation

    Host-Pathogen Interaction Group, Temasek Life Sciences Laboratory, National University of Singapore, 1 Research Link, Singapore 117604, Singapore.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
F21M12.9 proteinA76Arabidopsis thalianaMutation(s): 0 
Gene Names: DRB1HYL1At1g09700F21M12.9
Find proteins for O04492 (Arabidopsis thaliana)
Explore O04492 
Go to UniProtKB:  O04492
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.322 
  • R-Value Work: 0.255 
  • R-Value Observed: 0.261 
  • Space Group: P 43
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.108α = 90
b = 46.108β = 90
c = 33.318γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2010-01-22 
  • Released Date: 2010-05-26 
  • Deposition Author(s): Yuan, Y.A., Chen, H.Y.

Revision History 

  • Version 1.0: 2010-05-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance