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

Journal Article · · Nucleic Acids Research
DOI:https://doi.org/10.1093/nar/gkv748· OSTI ID:1229454
 [1];  [1];  [2];  [3];  [4];  [4];  [1]
  1. Univ. of Pittsburgh, Pittsburgh, PA (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Univ. of Oxford, Oxford (United Kingdom)
  4. CNRS-UMR5096, Perpignan (France); Univ. de Perpignan-UMR5096, Perpignan (France)

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. Ultimately, these studies lay the foundation necessary for proceeding toward a structural mechanism by which LARP1 links mTOR signalling to ribosome biogenesis.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704; AC02-98CH10886; FWP BO-70; MWRIF 8059; 8P41GM103473-16
OSTI ID:
1229454
Report Number(s):
BNL-111530-2015-JA
Journal Information:
Nucleic Acids Research, Vol. 43, Issue 16; ISSN 0305-1048
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 41 works
Citation information provided by
Web of Science

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Cited By (18)

The La and related RNA-binding proteins (LARPs): structures, functions, and evolving perspectives: The LARPs, La, and related RNA-binding proteins journal August 2017
Trans -acting translational regulatory RNA binding proteins journal January 2018
LARP1 on TOP of ribosome production journal May 2018
The PI3K–AKT network at the interface of oncogenic signalling and cancer metabolism journal November 2019
Molecular logic of mTORC1 signalling as a metabolic rheostat journal March 2019
The molecular basis of mTORC1-regulated translation journal February 2017
The LARP1 La-Module recognizes both ends of TOP mRNAs journal October 2019
The RNA-binding protein LARP1 is a post-transcriptional regulator of survival and tumorigenesis in ovarian cancer journal December 2015
Webina: An Open-Source Library and Web App that Runs AutoDock Vina Entirely in the Web Browser journal December 2019
LARP1 facilitates translational recovery after amino acid refeeding by preserving long poly(A)-tailed TOP mRNAs posted_content February 2020
Signaling Pathways Involved in the Regulation of mRNA Translation journal April 2018
The La-Related Proteins, a Family with Connections to Cancer journal October 2015
La-related protein 1 (LARP1) binds the mRNA cap, blocking eIF4F assembly on TOP mRNAs journal April 2017
LARP1 functions as a molecular switch for mTORC1-mediated translation of an essential class of mRNAs journal June 2017
Webina: an open-source library and web app that runs AutoDock Vina entirely in the web browser journal June 2020
Human La binds mRNAs through contacts to the poly(A) tail journal February 2018
Role of CDK1 in Translational Regulation in the M-Phase journal April 2020
Translation of Human β-Actin mRNA is Regulated by mTOR Pathway journal January 2019