Crystal structure of IMP3 RRM12 in complex with RNA (CCCC)

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.170 

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Structural basis of IMP3 RRM12 recognition of RNA.

Jia, M.Gut, H.Chao, J.A.

(2018) RNA 24: 1659-1666

  • DOI: https://doi.org/10.1261/rna.065649.118
  • Primary Citation of Related Structures:  
    6FQ1, 6FQR, 6GX6

  • PubMed Abstract: 

    The IMP family of RNA binding proteins, also named as insulin-like growth factor 2 (IGF2) mRNA-binding proteins (IGF2BPs), are highly conserved RNA regulators that are involved in many RNA processing stages, including mRNA stability, localization, and translation. There are three paralogs in the IMP family, IMP1-3, in mammals that all adopt the same domain arrangement with two RNA recognition motifs (RRM) in the N terminus and four KH domains in the C terminus. Here, we report the structure and biochemical characterization of IMP3 RRM12 and its complex with two short RNAs. These structures show that both RRM domains of IMP3 adopt the canonical RRM topology with two α-helices packed on an anti-parallel four stranded β-sheet. The spatial orientation of RRM1 to RRM2 is unique compared with other known tandem RRM structures. In the IMP3 RRM12 complex with RNA, only RRM1 is involved in RNA binding and recognizes a dinucleotide sequence.

  • Organizational Affiliation

    Friedrich Miescher Institute for Biomedical Research, CH-4058 Basel, Switzerland.


Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Insulin-like growth factor 2 mRNA-binding protein 3
A, B
170Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for O00425 (Homo sapiens)
Explore O00425 
Go to UniProtKB:  O00425
PHAROS:  O00425
GTEx:  ENSG00000136231 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO00425
Sequence Annotations
  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains LengthOrganismImage
RNA CCCC4Homo sapiens
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.170 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 30.06α = 92.14
b = 41.19β = 100.4
c = 72.27γ = 108.65
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
Cootmodel building

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Swiss National Science Foundation (SNF)Switzerland31003A_156477
Novartis Research FoundationSwitzerland--

Revision History  (Full details and data files)

  • Version 1.0: 2018-09-05
    Type: Initial release
  • Version 1.1: 2018-11-28
    Changes: Data collection, Database references
  • Version 1.2: 2024-01-17
    Changes: Data collection, Database references, Refinement description