RNA BINDING PROTEIN Solution structure of the third KH domain of KSRP in complex with the G-rich target sequence.

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Noncanonical G Recognition Mediates Ksrp Regulation of Let-7 Biogenesis

Nicastro, G.Garcia-Mayoral, M.F.Hollingworth, D.Kelly, G.Martin, S.R.Briata, P.Gherzi, R.Ramos, A.

(2012) Nat Struct Mol Biol 19: 1282

  • DOI: https://doi.org/10.1038/nsmb.2427
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Let-7 is an important tumor-suppressive microRNA (miRNA) that acts as an on-off switch for cellular differentiation and regulates the expression of a set of human oncogenes. Binding of the human KSRP protein to let-7 miRNA precursors positively regulates their processing to mature let-7, thereby contributing to control of cell proliferation, apoptosis and differentiation. Here we analyze the molecular basis for KSRP-let-7 precursor selectivity and show how the third KH domain of the protein recognizes a G-rich sequence in the pre-let-7 terminal loop and dominates the interaction. The structure of the KH3-RNA complex explains the protein recognition of this noncanonical KH target sequence, and we demonstrate that the specificity of this binding is crucial for the functional interaction between the protein and the miRNA precursor.

  • Organizational Affiliation

    Molecular Structure Division, Medical Research Council National Institute for Medical Research, London, UK.


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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
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Find proteins for Q92945 (Homo sapiens)
Explore Q92945 
Go to UniProtKB:  Q92945
PHAROS:  Q92945
GTEx:  ENSG00000088247 
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UniProt GroupQ92945
Sequence Annotations
  • Reference Sequence

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Entity ID: 2
MoleculeChains LengthOrganismImage
5'-R(*AP*GP*GP*GP*UP)-3'5synthetic construct
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-11-07
    Type: Initial release
  • Version 1.1: 2012-11-21
    Changes: Database references
  • Version 1.2: 2012-11-28
    Changes: Other, Structure summary
  • Version 1.3: 2012-12-05
    Changes: Atomic model
  • Version 1.4: 2013-01-16
    Changes: Database references