8OUF

The H/ACA RNP lobe of human telomerase with the dyskerin thumb loop in an open conformation


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

2.7 angstrom cryo-EM structure of human telomerase H/ACA ribonucleoprotein.

Ghanim, G.E.Sekne, Z.Balch, S.van Roon, A.M.Nguyen, T.H.D.

(2024) Nat Commun 15: 746-746

  • DOI: https://doi.org/10.1038/s41467-024-45002-x
  • Primary Citation of Related Structures:  
    8OUE, 8OUF

  • PubMed Abstract: 

    Telomerase is a ribonucleoprotein (RNP) enzyme that extends telomeric repeats at eukaryotic chromosome ends to counterbalance telomere loss caused by incomplete genome replication. Human telomerase is comprised of two distinct functional lobes tethered by telomerase RNA (hTR): a catalytic core, responsible for DNA extension; and a Hinge and ACA (H/ACA) box RNP, responsible for telomerase biogenesis. H/ACA RNPs also have a general role in pseudouridylation of spliceosomal and ribosomal RNAs, which is critical for the biogenesis of the spliceosome and ribosome. Much of our structural understanding of eukaryotic H/ACA RNPs comes from structures of the human telomerase H/ACA RNP. Here we report a 2.7 Å cryo-electron microscopy structure of the telomerase H/ACA RNP. The significant improvement in resolution over previous 3.3 Å to 8.2 Å structures allows us to uncover new molecular interactions within the H/ACA RNP. Many disease mutations are mapped to these interaction sites. The structure also reveals unprecedented insights into a region critical for pseudouridylation in canonical H/ACA RNPs. Together, our work advances understanding of telomerase-related disease mutations and the mechanism of pseudouridylation by eukaryotic H/ACA RNPs.


  • Organizational Affiliation

    MRC Laboratory of Molecular Biology, Cambridge, CB2 0QH, UK.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
H/ACA ribonucleoprotein complex subunit DKC1B [auth C],
F [auth G]
514Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for O60832 (Homo sapiens)
Explore O60832 
Go to UniProtKB:  O60832
GTEx:  ENSG00000130826 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO60832
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
H/ACA ribonucleoprotein complex subunit 1C [auth D],
G [auth H]
217Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NY12 (Homo sapiens)
Explore Q9NY12 
Go to UniProtKB:  Q9NY12
PHAROS:  Q9NY12
GTEx:  ENSG00000109534 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9NY12
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
H/ACA ribonucleoprotein complex subunit 2D [auth E],
H [auth I]
153Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NX24 (Homo sapiens)
Explore Q9NX24 
Go to UniProtKB:  Q9NX24
GTEx:  ENSG00000145912 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9NX24
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
H/ACA ribonucleoprotein complex subunit 3E [auth F],
I [auth J]
64Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NPE3 (Homo sapiens)
Explore Q9NPE3 
Go to UniProtKB:  Q9NPE3
PHAROS:  Q9NPE3
GTEx:  ENSG00000182117 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9NPE3
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Telomerase Cajal body protein 1J [auth K]548Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9BUR4 (Homo sapiens)
Explore Q9BUR4 
Go to UniProtKB:  Q9BUR4
PHAROS:  Q9BUR4
GTEx:  ENSG00000141499 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9BUR4
Sequence Annotations
Expand
  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains LengthOrganismImage
Human telomerase RNAA [auth B]451Homo sapiens
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION4
MODEL REFINEMENTREFMAC5.8
MODEL REFINEMENTPHENIX1.20-4459

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
UK Research and Innovation (UKRI)United KingdomMC_UP_1201/19
Jane Coffin Childs (JCC) FundUnited States--
European Molecular Biology Organization (EMBO)European Union--

Revision History  (Full details and data files)

  • Version 1.0: 2024-01-31
    Type: Initial release
  • Version 1.1: 2024-02-07
    Changes: Database references