6X46

NMR solution structure of Asterix/Gtsf1 from mouse (CHHC zinc finger domains)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Asterix/Gtsf1 links tRNAs and piRNA silencing of retrotransposons.

Ipsaro, J.J.O'Brien, P.A.Bhattacharya, S.Palmer III, A.G.Joshua-Tor, L.

(2021) Cell Rep 34: 108914-108914

  • DOI: https://doi.org/10.1016/j.celrep.2021.108914
  • Primary Citation of Related Structures:  
    6X46

  • PubMed Abstract: 

    The Piwi-interacting RNA (piRNA) pathway safeguards genomic integrity by silencing transposable elements (transposons) in the germline. While Piwi is the central piRNA factor, others including Asterix/Gtsf1 have also been demonstrated to be critical for effective silencing. Here, using enhanced crosslinking and immunoprecipitation (eCLIP) with a custom informatic pipeline, we show that Asterix/Gtsf1 specifically binds tRNAs in cellular contexts. We determined the structure of mouse Gtsf1 by NMR spectroscopy and identified the RNA-binding interface on the protein's first zinc finger, which was corroborated by biochemical analysis as well as cryo-EM structures of Gtsf1 in complex with co-purifying tRNA. Consistent with the known dependence of long terminal repeat (LTR) retrotransposons on tRNA primers, we demonstrate that LTR retrotransposons are, in fact, preferentially de-repressed in Asterix mutants. Together, these findings link Asterix/Gtsf1, tRNAs, and LTR retrotransposon silencing and suggest that Asterix exploits tRNA dependence to identify transposon transcripts and promote piRNA silencing.


  • Organizational Affiliation

    Howard Hughes Medical Institute, W.M. Keck Structural Biology Laboratory, Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, NY 11724, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Gametocyte-specific factor 1121Mus musculusMutation(s): 4 
Gene Names: Gtsf1Cue110Fam112b
UniProt
Find proteins for Q9DAN6 (Mus musculus)
Explore Q9DAN6 
Go to UniProtKB:  Q9DAN6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9DAN6
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Howard Hughes Medical Institute (HHMI)United States--
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesF32GM097888
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01GM050291
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR35GM130398
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesT32GM008281-28
National Institutes of Health/National Center for Research Resources (NIH/NCRR)United StatesS10RR026540
National Institutes of Health/Office of the DirectorUnited StatesS10OD016432

Revision History  (Full details and data files)

  • Version 1.0: 2021-03-03
    Type: Initial release
  • Version 1.1: 2021-04-14
    Changes: Database references
  • Version 1.2: 2024-05-01
    Changes: Data collection, Database references