8QG0

Archaeoglobus fulgidus AfAgo complex with AfAgo-N protein (fAfAgo) bound with 17 nt RNA guide and 17 nt DNA target


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.43 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The missing part: the Archaeoglobus fulgidus Argonaute forms a functional heterodimer with an N-L1-L2 domain protein.

Manakova, E.Golovinas, E.Poceviciute, R.Sasnauskas, G.Silanskas, A.Rutkauskas, D.Jankunec, M.Zagorskaite, E.Jurgelaitis, E.Grybauskas, A.Venclovas, C.Zaremba, M.

(2024) Nucleic Acids Res 52: 2530-2545

  • DOI: https://doi.org/10.1093/nar/gkad1241
  • Primary Citation of Related Structures:  
    8OK9, 8OLD, 8OLJ, 8PVV, 8QG0

  • PubMed Abstract: 

    Argonaute (Ago) proteins are present in all three domains of life (bacteria, archaea and eukaryotes). They use small (15-30 nucleotides) oligonucleotide guides to bind complementary nucleic acid targets and are responsible for gene expression regulation, mobile genome element silencing, and defence against viruses or plasmids. According to their domain organization, Agos are divided into long and short Agos. Long Agos found in prokaryotes (long-A and long-B pAgos) and eukaryotes (eAgos) comprise four major functional domains (N, PAZ, MID and PIWI) and two structural linker domains L1 and L2. The majority (∼60%) of pAgos are short pAgos, containing only the MID and inactive PIWI domains. Here we focus on the prokaryotic Argonaute AfAgo from Archaeoglobus fulgidus DSM4304. Although phylogenetically classified as a long-B pAgo, AfAgo contains only MID and catalytically inactive PIWI domains, akin to short pAgos. We show that AfAgo forms a heterodimeric complex with a protein encoded upstream in the same operon, which is a structural equivalent of the N-L1-L2 domains of long pAgos. This complex, structurally equivalent to a long PAZ-less pAgo, outperforms standalone AfAgo in guide RNA-mediated target DNA binding. Our findings provide a missing piece to one of the first and the most studied pAgos.


  • Organizational Affiliation

    Institute of Biotechnology, Life Sciences Center, Vilnius University, Sauletekio av. 7, LT-10257, Vilnius, Lithuania.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Piwi protein427Archaeoglobus fulgidusMutation(s): 0 
Gene Names: XD48_2091
UniProt
Find proteins for O28951 (Archaeoglobus fulgidus (strain ATCC 49558 / DSM 4304 / JCM 9628 / NBRC 100126 / VC-16))
Explore O28951 
Go to UniProtKB:  O28951
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO28951
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
AfAgo-N protein273Archaeoglobus fulgidusMutation(s): 0 
Gene Names: AFULGI_00014290
UniProt
Find proteins for A0A075WKW4 (Archaeoglobus fulgidus DSM 8774)
Explore A0A075WKW4 
Go to UniProtKB:  A0A075WKW4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A075WKW4
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains LengthOrganismImage
DNA target 17 ntC [auth P]17Escherichia coli
Sequence Annotations
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  • Reference Sequence

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Entity ID: 4
MoleculeChains LengthOrganismImage
RNA guide 17 ntD [auth Q]17Escherichia coli
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.43 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONcryoSPARCv.4.2.1
MODEL REFINEMENTPHENIX1.18.2_3874:

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Research Council of LithuaniaLithuaniaS-MIP-23-131
Research Council of LithuaniaLithuaniaS-MIP-20-37

Revision History  (Full details and data files)

  • Version 1.0: 2024-01-24
    Type: Initial release
  • Version 1.1: 2024-03-27
    Changes: Database references