6D6V

CryoEM structure of Tetrahymena telomerase with telomeric DNA at 4.8 Angstrom resolution


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.8 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure of Telomerase with Telomeric DNA.

Jiang, J.Wang, Y.Susac, L.Chan, H.Basu, R.Zhou, Z.H.Feigon, J.

(2018) Cell 173: 1179-1190.e13

  • DOI: 10.1016/j.cell.2018.04.038

  • PubMed Abstract: 
  • Telomerase is an RNA-protein complex (RNP) that extends telomeric DNA at the 3' ends of chromosomes using its telomerase reverse transcriptase (TERT) and integral template-containing telomerase RNA (TER). Its activity is a critical determinant of hum ...

    Telomerase is an RNA-protein complex (RNP) that extends telomeric DNA at the 3' ends of chromosomes using its telomerase reverse transcriptase (TERT) and integral template-containing telomerase RNA (TER). Its activity is a critical determinant of human health, affecting aging, cancer, and stem cell renewal. Lack of atomic models of telomerase, particularly one with DNA bound, has limited our mechanistic understanding of telomeric DNA repeat synthesis. We report the 4.8 Å resolution cryoelectron microscopy structure of active Tetrahymena telomerase bound to telomeric DNA. The catalytic core is an intricately interlocked structure of TERT and TER, including a previously structurally uncharacterized TERT domain that interacts with the TEN domain to physically enclose TER and regulate activity. This complete structure of a telomerase catalytic core and its interactions with telomeric DNA from the template to telomere-interacting p50-TEB complex provides unanticipated insights into telomerase assembly and catalytic cycle and a new paradigm for a reverse transcriptase RNP.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA; California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Telomerase reverse transcriptase
A
1117Tetrahymena thermophilaMutation(s): 0 
Gene Names: TERT
EC: 2.7.7.49
Find proteins for O77448 (Tetrahymena thermophila)
Go to Gene View: TERT
Go to UniProtKB:  O77448
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Telomerase-associated protein 82
D
701Tetrahymena thermophilaMutation(s): 0 
Gene Names: TAP82
Find proteins for D2CVN6 (Tetrahymena thermophila)
Go to UniProtKB:  D2CVN6
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Telomerase holoenzyme TEB heterotrimer Teb3 subunit
F
121Tetrahymena thermophilaMutation(s): 0 
Find proteins for A0A0U8UFF4 (Tetrahymena thermophila)
Go to UniProtKB:  A0A0U8UFF4
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Telomerase holoenzyme Teb2 subunit
E
269Tetrahymena thermophilaMutation(s): 0 
Find proteins for A0A0U8TRG9 (Tetrahymena thermophila)
Go to UniProtKB:  A0A0U8TRG9
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
Telomerase-associated protein 50
G
157N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
Telomerase associated protein p65
H
542Tetrahymena thermophilaMutation(s): 0 
Gene Names: TAP65
Find proteins for Q6JXI6 (Tetrahymena thermophila)
Go to UniProtKB:  Q6JXI6
Entity ID: 5
MoleculeChainsLengthOrganism
RNA (159-MER)B159Tetrahymena thermophila
Entity ID: 6
MoleculeChainsLengthOrganism
DNA (5'-D(P*GP*TP*TP*GP*GP*GP*GP*TP*TP*GP*GP*GP*GP*TP*TP*GP*GP*GP*G)-3')C19Tetrahymena thermophila
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
D
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
UNK
Query on UNK
G
L-PEPTIDE LINKINGC4 H9 N O2

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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.8 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesGM048123
National Science Foundation (United States)United StatesMCB1517625
National Institutes of Health/National Institute of General Medical SciencesUnited StatesGM071940
National Institutes of Health/National Institute of General Medical SciencesUnited StatesGM007185
National Institutes of Health/Office of the DirectorUnited States1S10OD018111
National Institutes of Health/National Institute of General Medical SciencesUnited States1U24GM116792
National Science Foundation (United States)United StatesDBI-1338135
National Science Foundation (United States)United StatesDMR-1548924
American Heart AssociationUnited States14POST18870059

Revision History 

  • Version 1.0: 2018-05-30
    Type: Initial release