4YOE

Structure of UP1 bound to RNA 5'-AGU-3'


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.92 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.188 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The First Crystal Structure of the UP1 Domain of hnRNP A1 Bound to RNA Reveals a New Look for an Old RNA Binding Protein.

Morgan, C.E.Meagher, J.L.Levengood, J.D.Delproposto, J.Rollins, C.Stuckey, J.A.Tolbert, B.S.

(2015) J Mol Biol 427: 3241-3257

  • DOI: 10.1016/j.jmb.2015.05.009
  • Primary Citation of Related Structures:  
    4YOE

  • PubMed Abstract: 
  • The heterogeneous nuclear ribonucleoprotein (hnRNP) A1 protein is a multifunctional RNA binding protein implicated in a wide range of biological functions. Mechanisms and putative hnRNP A1-RNA interactions have been inferred primarily from the crystal structure of its UP1 domain bound to ssDNA ...

    The heterogeneous nuclear ribonucleoprotein (hnRNP) A1 protein is a multifunctional RNA binding protein implicated in a wide range of biological functions. Mechanisms and putative hnRNP A1-RNA interactions have been inferred primarily from the crystal structure of its UP1 domain bound to ssDNA. RNA stem loops represent an important class of known hnRNP A1 targets, yet little is known about the structural basis of hnRNP A1-RNA recognition. Here, we report the first high-resolution structure (1.92Å) of UP1 bound to a 5'-AGU-3' trinucleotide that resembles sequence elements of several native hnRNP A1-RNA stem loop targets. UP1 interacts specifically with the AG dinucleotide sequence via a "nucleobase pocket" formed by the β-sheet surface of RRM1 and the inter-RRM linker; RRM2 does not contact the RNA. The inter-RRM linker forms the lid of the nucleobase pocket and we show using structure-guided mutagenesis that the conserved salt-bridge interactions (R75:D155 and R88:D157) on the α-helical side of the RNA binding surface stabilize the linker in a geometry poised to bind RNA. We further investigated the structural basis of UP1 binding HIViSL3(ESS3) by determining a structural model of the complex scored by small-angle X-ray scattering. UP1 docks on the apical loop of SL3(ESS3) using its RRM1 domain and inter-RRM linker only. The biophysical implications of the structural model were tested by measuring kinetic binding parameters, where mutations introduced within the apical loop reduce binding affinities by slowing down the rate of complex formation. Collectively, the data presented here provide the first insights into hnRNP A1-RNA interactions.


    Organizational Affiliation

    Department of Chemistry, Case Western Reserve University, Cleveland, OH 44106, USA. Electronic address: bst18@case.edu.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Heterogeneous nuclear ribonucleoprotein A1 A206Homo sapiensMutation(s): 0 
Gene Names: HNRNPA1HNRPA1
Find proteins for P09651 (Homo sapiens)
Explore P09651 
Go to UniProtKB:  P09651
NIH Common Fund Data Resources
PHAROS:  P09651
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 2
    MoleculeChainsLengthOrganismImage
    RNA AGUE3synthetic construct
    Small Molecules
    Ligands 2 Unique
    IDChainsName / Formula / InChI Key2D Diagram3D Interactions
    SO4
    Query on SO4

    Download Ideal Coordinates CCD File 
    A
    SULFATE ION
    O4 S
    QAOWNCQODCNURD-UHFFFAOYSA-L
     Ligand Interaction
    ACT
    Query on ACT

    Download Ideal Coordinates CCD File 
    A
    ACETATE ION
    C2 H3 O2
    QTBSBXVTEAMEQO-UHFFFAOYSA-M
     Ligand Interaction
    Experimental Data & Validation

    Experimental Data

    • Method: X-RAY DIFFRACTION
    • Resolution: 1.92 Å
    • R-Value Free: 0.238 
    • R-Value Work: 0.186 
    • R-Value Observed: 0.188 
    • Space Group: C 2 2 21
    Unit Cell:
    Length ( Å )Angle ( ˚ )
    a = 40.557α = 90
    b = 64.523β = 90
    c = 141.352γ = 90
    Software Package:
    Software NamePurpose
    HKL-2000data collection
    HKL-2000data scaling
    PHASERphasing
    BUSTER-TNTrefinement
    PDB_EXTRACTdata extraction

    Structure Validation

    View Full Validation Report



    Entry History & Funding Information

    Deposition Data


    Funding OrganizationLocationGrant Number
    National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01GM101979
    National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesP50GM103297

    Revision History  (Full details and data files)

    • Version 1.0: 2015-06-10
      Type: Initial release
    • Version 1.1: 2015-10-07
      Changes: Database references
    • Version 1.2: 2017-09-20
      Changes: Author supporting evidence, Database references, Derived calculations
    • Version 1.3: 2019-12-25
      Changes: Author supporting evidence