6D6V

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

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.2 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
  • Primary Citation of Related Structures:  
    6D6V

  • 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 human health, affecting aging, cancer, and stem cell renewal ...

    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. Electronic address: feigon@mbi.ucla.edu.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Telomerase reverse transcriptaseA1117Tetrahymena thermophilaMutation(s): 0 
EC: 2.7.7.49
UniProt
Find proteins for O77448 (Tetrahymena thermophila (strain SB210))
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UniProt GroupO77448
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Telomerase-associated protein 82B [auth D]701Tetrahymena thermophilaMutation(s): 0 
UniProt
Find proteins for D2CVN6 (Tetrahymena thermophila (strain SB210))
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UniProt GroupD2CVN6
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Telomerase holoenzyme TEB heterotrimer Teb3 subunitC [auth F]121Tetrahymena thermophilaMutation(s): 0 
UniProt
Find proteins for A0A0U8UFF4 (Tetrahymena thermophila (strain SB210))
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UniProt GroupA0A0U8UFF4
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Telomerase holoenzyme Teb2 subunitD [auth E]269Tetrahymena thermophilaMutation(s): 0 
UniProt
Find proteins for A0A0U8TRG9 (Tetrahymena thermophila (strain SB210))
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UniProt GroupA0A0U8TRG9
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Telomerase-associated protein 50G157Tetrahymena thermophilaMutation(s): 0 
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
Telomerase associated protein p65H542Tetrahymena thermophilaMutation(s): 0 
UniProt
Find proteins for W7X6T2 (Tetrahymena thermophila (strain SB210))
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UniProt GroupW7X6T2
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Entity ID: 5
MoleculeChainsLengthOrganismImage
RNA (159-MER)E [auth B]159Tetrahymena thermophila
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Entity ID: 6
MoleculeChainsLengthOrganismImage
DNA (5'-D(P*GP*TP*TP*GP*GP*GP*GP*TP*TP*GP*GP*GP*GP*TP*TP*GP*GP*GP*G)-3')F [auth C]19Tetrahymena thermophila
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Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN
Download Ideal Coordinates CCD File 
I [auth D]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

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

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-30
    Type: Initial release
  • Version 1.1: 2019-11-27
    Changes: Author supporting evidence
  • Version 1.2: 2019-12-18
    Changes: Other