Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 6-mer - ABCDEF 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 394987.00 
• Atom Count: 17317 
• Residue Count: 3085 
• Unique protein chains: 6
• Unique nucleic acid chains: 2

6D6V

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

• DOI: 10.2210/pdb6D6V/pdb
• EMDataResource: EMD-7821

• Classification: REPLICATION
• Organism(s): Tetrahymena thermophila


• Deposited: 2018-04-22 Released: 2018-05-30 
• Deposition Author(s): Jiang, J., Wang, Y., Susac, L., Chan, H., Basu, R., Zhou, Z.H., Feigon, J.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS); National Science Foundation (NSF, United States); National Institutes of Health/Office of the Director; American Heart Association 

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Experimental Data Snapshot

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

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

• PubMed: 29775593 
• 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 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.

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Organizational Affiliation: 

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. Electronic address: [e-mail].,Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA.,Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA. Electronic address: [e-mail].,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
Molecule	Chains	Sequence Length	Organism	Details
Telomerase reverse transcriptase	A	1117	Tetrahymena thermophila	Mutation(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
Molecule	Chains	Sequence Length	Organism	Details
Telomerase-associated protein 82	D	701	Tetrahymena thermophila	Mutation(s): 0  Gene Names: TAP82
Find proteins for D2CVN6 (Tetrahymena thermophila) Go to UniProtKB:  D2CVN6

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
Telomerase holoenzyme TEB heterotrimer Teb3 subunit	F	121	Tetrahymena thermophila	Mutation(s): 0
Find proteins for A0A0U8UFF4 (Tetrahymena thermophila) Go to UniProtKB:  A0A0U8UFF4

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details
Telomerase holoenzyme Teb2 subunit	E	269	Tetrahymena thermophila	Mutation(s): 0
Find proteins for A0A0U8TRG9 (Tetrahymena thermophila) Go to UniProtKB:  A0A0U8TRG9

Entity ID: 7
Molecule	Chains	Sequence Length	Organism	Details
Telomerase-associated protein 50	G	157	N/A	Mutation(s): 0
Protein Feature View is not available: No corresponding UniProt sequence found.

Entity ID: 8
Molecule	Chains	Sequence Length	Organism	Details
Telomerase associated protein p65	H	542	Tetrahymena thermophila	Mutation(s): 0  Gene Names: TAP65
Find proteins for Q6JXI6 (Tetrahymena thermophila) Go to UniProtKB:  Q6JXI6

Entity ID: 5
Molecule	Chains	Length	Organism
RNA (159-MER)	B	159	Tetrahymena thermophila

Entity ID: 6
Molecule	Chains	Length	Organism
DNA (5'-D(P*GP*TP*TP*GP*GP*GP*GP*TP*TP*GP*GP*GP*GP*TP*TP*GP*GP*GP*G)-3')	C	19	Tetrahymena thermophila

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ZN	D	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
UNK	G	L-PEPTIDE LINKING	C4 H9 N O2		--

Experimental Data & Validation

Experimental Data

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

Software Package:

Software Name	Purpose
PHENIX	refinement

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2018-04-22 
• Released Date: 2018-05-30 
• Deposition Author(s): Jiang, J., Wang, Y., Susac, L., Chan, H., Basu, R., Zhou, Z.H., Feigon, J.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM048123
National Science Foundation (NSF, United States)	United States	MCB1517625
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM071940
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM007185
National Institutes of Health/Office of the Director	United States	1S10OD018111
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	1U24GM116792
National Science Foundation (NSF, United States)	United States	DBI-1338135
National Science Foundation (NSF, United States)	United States	DMR-1548924
American Heart Association	United States	14POST18870059

Revision History 

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