4P6Q

The crystal structure of the Split End protein SHARP adds a new layer of complexity to proteins containing RNA Recognition Motifs


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 2.0 of the entry. See complete history

Literature

The crystal structure of the Split End protein SHARP adds a new layer of complexity to proteins containing RNA recognition motifs.

Arieti, F.Gabus, C.Tambalo, M.Huet, T.Round, A.Thore, S.

(2014) Nucleic Acids Res. 42: 6742

  • DOI: 10.1093/nar/gku277

  • PubMed Abstract: 
  • The Split Ends (SPEN) protein was originally discovered in Drosophila in the late 1990s. Since then, homologous proteins have been identified in eukaryotic species ranging from plants to humans. Every family member contains three predicted RNA recogn ...

    The Split Ends (SPEN) protein was originally discovered in Drosophila in the late 1990s. Since then, homologous proteins have been identified in eukaryotic species ranging from plants to humans. Every family member contains three predicted RNA recognition motifs (RRMs) in the N-terminal region of the protein. We have determined the crystal structure of the region of the human SPEN homolog that contains these RRMs-the SMRT/HDAC1 Associated Repressor Protein (SHARP), at 2.0 Å resolution. SHARP is a co-regulator of the nuclear receptors. We demonstrate that two of the three RRMs, namely RRM3 and RRM4, interact via a highly conserved interface. Furthermore, we show that the RRM3-RRM4 block is the main platform mediating the stable association with the H12-H13 substructure found in the steroid receptor RNA activator (SRA), a long, non-coding RNA previously shown to play a crucial role in nuclear receptor transcriptional regulation. We determine that SHARP association with SRA relies on both single- and double-stranded RNA sequences. The crystal structure of the SHARP-RRM fragment, together with the associated RNA-binding studies, extend the repertoire of nucleic acid binding properties of RRM domains suggesting a new hypothesis for a better understanding of SPEN protein functions.


    Organizational Affiliation

    Department of Molecular Biology, University of Geneva, Geneva 1211, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Msx2-interacting protein
A
286Homo sapiensMutation(s): 0 
Gene Names: SPEN (KIAA0929, MINT, SHARP)
Find proteins for Q96T58 (Homo sapiens)
Go to Gene View: SPEN
Go to UniProtKB:  Q96T58
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.192 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 60.670α = 90.00
b = 69.710β = 90.00
c = 88.920γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
XSCALEdata scaling
XDSdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swiss National Science FoundationSwitzerlandN?316030-128787

Revision History 

  • Version 1.0: 2014-05-14
    Type: Initial release
  • Version 2.0: 2017-09-06
    Type: Advisory, Atomic model, Author supporting evidence