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
Find proteins for O77448 (Tetrahymena thermophila (strain SB210))
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Go to UniProtKB:  O77448
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Telomerase-associated protein 82B [auth D]701Tetrahymena thermophilaMutation(s): 0 
Find proteins for D2CVN6 (Tetrahymena thermophila (strain SB210))
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Telomerase holoenzyme TEB heterotrimer Teb3 subunitC [auth F]121Tetrahymena thermophilaMutation(s): 0 
Find proteins for A0A0U8UFF4 (Tetrahymena thermophila (strain SB210))
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Go to UniProtKB:  A0A0U8UFF4
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Telomerase holoenzyme Teb2 subunitD [auth E]269Tetrahymena thermophilaMutation(s): 0 
Find proteins for A0A0U8TRG9 (Tetrahymena thermophila (strain SB210))
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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 
Find proteins for W7X6T2 (Tetrahymena thermophila (strain SB210))
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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
    Protein Feature View
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    • Reference Sequence
    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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    View more in-depth experimental data

    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