3D2N

Crystal structure of MBNL1 tandem zinc finger 1 and 2 domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural insights into RNA recognition by the alternative-splicing regulator muscleblind-like MBNL1.

Teplova, M.Patel, D.J.

(2008) Nat.Struct.Mol.Biol. 15: 1343-1351

  • DOI: 10.1038/nsmb.1519
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Muscleblind-like (MBNL) proteins, regulators of developmentally programmed alternative splicing, harbor tandem CCCH zinc-finger (ZnF) domains that target pre-mRNAs containing YGCU(U/G)Y sequence elements (where Y is a pyrimidine). In myotonic dystrop ...

    Muscleblind-like (MBNL) proteins, regulators of developmentally programmed alternative splicing, harbor tandem CCCH zinc-finger (ZnF) domains that target pre-mRNAs containing YGCU(U/G)Y sequence elements (where Y is a pyrimidine). In myotonic dystrophy, reduced levels of MBNL proteins lead to aberrant alternative splicing of a subset of pre-mRNAs. The crystal structure of MBNL1 ZnF3/4 bound to r(CGCUGU) establishes that both ZnF3 and ZnF4 target GC steps, with site-specific recognition mediated by a network of hydrogen bonds formed primarily with main chain groups of the protein. The relative alignment of ZnF3 and ZnF4 domains is dictated by the topology of the interdomain linker, with a resulting antiparallel orientation of bound GC elements, supportive of a chain-reversal loop trajectory for MBNL1-bound pre-mRNA targets. We anticipate that MBNL1-mediated targeting of looped RNA segments proximal to splice-site junctions could contribute to pre-mRNA alternative-splicing regulation.


    Organizational Affiliation

    Structural Biology Program, Memorial Sloan-Kettering Cancer Center, 439 East 67th Street, New York, NY 10021, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Muscleblind-like protein 1
A
83Homo sapiensMutation(s): 0 
Gene Names: MBNL1 (EXP, KIAA0428, MBNL)
Find proteins for Q9NR56 (Homo sapiens)
Go to Gene View: MBNL1
Go to UniProtKB:  Q9NR56
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.230 
  • Space Group: P 31
Unit Cell:
Length (Å)Angle (°)
a = 49.320α = 90.00
b = 49.320β = 90.00
c = 36.026γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data scaling
SOLVEphasing
REFMACrefinement
HKL-2000data collection
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-12-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance