5ZMC

Structural Basis for Reactivation of -146C>T Mutant TERT Promoter by cooperative binding of p52 and ETS1/2

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.99 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.259 
  • R-Value Observed: 0.260 

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This is version 1.1 of the entry. See complete history. 


Literature

Structural basis for reactivating the mutant TERT promoter by cooperative binding of p52 and ETS1.

Xu, X., Li, Y., Bharath, S.R., Ozturk, M.B., Bowler, M.W., Loo, B.Z.L., Tergaonkar, V., Song, H.

(2018) Nat Commun 9: 3183-3183

  • DOI: 10.1038/s41467-018-05644-0
  • Primary Citation of Related Structures:  
    5ZMC

  • PubMed Abstract: 

    • Transcriptional factors ETS1/2 and p52 synergize downstream of non-canonical NF-κB signaling to drive reactivation of the -146C>T mutant TERT promoter in multiple cancer types, but the mechanism underlying this cooperativity remains unknown. Here we report the crystal structure of a ternary p52/ETS1/-146C>T TERT promoter complex ...

    Transcriptional factors ETS1/2 and p52 synergize downstream of non-canonical NF-κB signaling to drive reactivation of the -146C>T mutant TERT promoter in multiple cancer types, but the mechanism underlying this cooperativity remains unknown. Here we report the crystal structure of a ternary p52/ETS1/-146C>T TERT promoter complex. While p52 needs to associate with consensus κB sites on the DNA to function during non-canonical NF-κB signaling, we show that p52 can activate the -146C>T TERT promoter without binding DNA. Instead, p52 interacts with ETS1 to form a heterotetramer, counteracting autoinhibition of ETS1. Analogous to observations with the GABPA/GABPB heterotetramer, the native flanking ETS motifs are required for sustained activation of the -146C>T TERT promoter by the p52/ETS1 heterotetramer. These observations provide a unifying mechanism for transcriptional activation by GABP and ETS1, and suggest that genome-wide targets of non-canonical NF-κB signaling are not limited to those driven by consensus κB sequences.

    Organizational Affiliation: 

    Department of Biochemistry, National University of Singapore, 14 Science Drive, Singapore, 117543, Singapore. haiwei@imcb.a-star.edu.sg.



Macromolecules

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Protein C-ets-1C [auth B]111Homo sapiensMutation(s): 0 
Gene Names: ETS1, EWSR2
UniProt & NIH Common Fund Data Resources
Find proteins for P14921 (Homo sapiens)
Explore P14921 
Go to UniProtKB:  P14921
PHAROS:  P14921
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UniProt GroupP14921
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Nuclear factor NF-kappa-B p100 subunitD [auth A]295Homo sapiensMutation(s): 0 
Gene Names: NFKB2, LYT10
UniProt & NIH Common Fund Data Resources
Find proteins for Q00653 (Homo sapiens)
Explore Q00653 
Go to UniProtKB:  Q00653
PHAROS:  Q00653
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UniProt GroupQ00653
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Entity ID: 1
MoleculeChainsLengthOrganismImage
DNA (5'-D(P*CP*GP*GP*GP*GP*AP*CP*CP*CP*GP*GP*AP*AP*GP*GP*G)-3')A [auth C]16Homo sapiens
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Entity ID: 2
MoleculeChainsLengthOrganismImage
DNA (5'-D(P*GP*CP*CP*CP*TP*TP*CP*CP*GP*GP*GP*TP*CP*CP*CP*C)-3')B [auth D]16Homo sapiens
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.99 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.259 
  • R-Value Observed: 0.260 
  • Space Group: P 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.414α = 90
b = 71.414β = 90
c = 262.52γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-09-19
    Type: Initial release
  • Version 1.1: 2018-10-17
    Changes: Data collection, Database references