5V7C

Crystal structure of LARP1-unique domain DM15 bound 5'TOP RNA sequence


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

La-related protein 1 (LARP1) binds the mRNA cap, blocking eIF4F assembly on TOP mRNAs.

Lahr, R.M.Fonseca, B.D.Ciotti, G.E.Al-Ashtal, H.A.Jia, J.J.Niklaus, M.R.Blagden, S.P.Alain, T.Berman, A.J.

(2017) Elife 6: --

  • DOI: 10.7554/eLife.24146
  • Primary Citation of Related Structures:  5V4R, 5V87

  • PubMed Abstract: 
  • The 5'terminal oligopyrimidine (5'TOP) motif is a cis-regulatory RNA element located immediately downstream of the 7-methylguanosine [m7G] cap of TOP mRNAs, which encode ribosomal proteins and translation factors. In eukaryotes, this motif coordinate ...

    The 5'terminal oligopyrimidine (5'TOP) motif is a cis-regulatory RNA element located immediately downstream of the 7-methylguanosine [m7G] cap of TOP mRNAs, which encode ribosomal proteins and translation factors. In eukaryotes, this motif coordinates the synchronous and stoichiometric expression of the protein components of the translation machinery. La-related protein 1 (LARP1) binds TOP mRNAs, regulating their stability and translation. We present crystal structures of the human LARP1 DM15 region in complex with a 5'TOP motif, a cap analog (m7GTP), and a capped cytidine (m7GpppC), resolved to 2.6, 1.8 and 1.7 Å, respectively. Our binding, competition, and immunoprecipitation data corroborate and elaborate on the mechanism of 5'TOP motif binding by LARP1. We show that LARP1 directly binds the cap and adjacent 5'TOP motif of TOP mRNAs, effectively impeding access of eIF4E to the cap and preventing eIF4F assembly. Thus, LARP1 is a specialized TOP mRNA cap-binding protein that controls ribosome biogenesis.


    Organizational Affiliation

    Department of Biological Sciences, University of Pittsburgh, Pittsburgh, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
La-related protein 1
B
162Homo sapiensGene Names: LARP1 (KIAA0731, LARP)
Find proteins for Q6PKG0 (Homo sapiens)
Go to Gene View: LARP1
Go to UniProtKB:  Q6PKG0
Entity ID: 2
MoleculeChainsLengthOrganism
RNA (5'-R(*CP*UP*UP*UP*UP*CP*CP*G)-3')C8Homo sapiens
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.207 
  • Space Group: I 4
Unit Cell:
Length (Å)Angle (°)
a = 107.095α = 90.00
b = 107.095β = 90.00
c = 29.113γ = 90.00
Software Package:
Software NamePurpose
Cootmodel building
PHENIXrefinement
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-04-19
    Type: Initial release
  • Version 1.1: 2017-11-22
    Type: Refinement description