4ZC4

Crystal structure of LARP1-unique domain DM15


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.182 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The La-related protein 1-specific domain repurposes HEAT-like repeats to directly bind a 5'TOP sequence.

Lahr, R.M.Mack, S.M.Heroux, A.Blagden, S.P.Bousquet-Antonelli, C.Deragon, J.M.Berman, A.J.

(2015) Nucleic Acids Res 43: 8077-8088

  • DOI: https://doi.org/10.1093/nar/gkv748
  • Primary Citation of Related Structures:  
    4ZC4, 5C0V

  • PubMed Abstract: 

    La-related protein 1 (LARP1) regulates the stability of many mRNAs. These include 5'TOPs, mTOR-kinase responsive mRNAs with pyrimidine-rich 5' UTRs, which encode ribosomal proteins and translation factors. We determined that the highly conserved LARP1-specific C-terminal DM15 region of human LARP1 directly binds a 5'TOP sequence. The crystal structure of this DM15 region refined to 1.86 Å resolution has three structurally related and evolutionarily conserved helix-turn-helix modules within each monomer. These motifs resemble HEAT repeats, ubiquitous helical protein-binding structures, but their sequences are inconsistent with consensus sequences of known HEAT modules, suggesting this structure has been repurposed for RNA interactions. A putative mTORC1-recognition sequence sits within a flexible loop C-terminal to these repeats. We also present modelling of pyrimidine-rich single-stranded RNA onto the highly conserved surface of the DM15 region. These studies lay the foundation necessary for proceeding toward a structural mechanism by which LARP1 links mTOR signalling to ribosome biogenesis.


  • Organizational Affiliation

    Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
La-related protein 1
A, B, C, D
162Homo sapiensMutation(s): 0 
Gene Names: LARP1KIAA0731LARP
UniProt & NIH Common Fund Data Resources
Find proteins for Q6PKG0 (Homo sapiens)
Explore Q6PKG0 
Go to UniProtKB:  Q6PKG0
PHAROS:  Q6PKG0
GTEx:  ENSG00000155506 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6PKG0
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.182 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.906α = 90
b = 61.759β = 116.2
c = 85.336γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
Cootmodel building
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-08-05
    Type: Initial release
  • Version 1.1: 2015-09-30
    Changes: Database references
  • Version 1.2: 2024-03-06
    Changes: Data collection, Database references, Derived calculations