7ZEW

Complex Cyp33-RRM : AAUAAA RNA


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 250 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

RNA binding induces an allosteric switch in Cyp33 to repress MLL1-mediated transcription.

Blatter, M.Meylan, C.Clery, A.Giambruno, R.Nikolaev, Y.Heidecker, M.Solanki, J.A.Diaz, M.O.Gabellini, D.Allain, F.H.

(2023) Sci Adv 9: eadf5330-eadf5330

  • DOI: https://doi.org/10.1126/sciadv.adf5330
  • Primary Citation of Related Structures:  
    7ZEV, 7ZEW, 7ZEX, 7ZEY, 7ZEZ

  • PubMed Abstract: 

    Mixed-lineage leukemia 1 (MLL1) is a transcription activator of the HOX family, which binds to specific epigenetic marks on histone H3 through its third plant homeodomain (PHD3) domain. Through an unknown mechanism, MLL1 activity is repressed by cyclophilin 33 (Cyp33), which binds to MLL1 PHD3. We determined solution structures of Cyp33 RNA recognition motif (RRM) free, bound to RNA, to MLL1 PHD3, and to both MLL1 and the histone H3 lysine N6-trimethylated. We found that a conserved α helix, amino-terminal to the RRM domain, adopts three different positions facilitating a cascade of binding events. These conformational changes are triggered by Cyp33 RNA binding and ultimately lead to MLL1 release from the histone mark. Together, our mechanistic findings rationalize how Cyp33 binding to MLL1 can switch chromatin to a transcriptional repressive state triggered by RNA binding as a negative feedback loop.


  • Organizational Affiliation

    Department of Biology, Institute of Biochemistry, ETH Zurich, 8093 Zurich, Switzerland.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Peptidyl-prolyl cis-trans isomerase E117Homo sapiensMutation(s): 0 
Gene Names: PPIECYP33
EC: 5.2.1.8
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UNP9 (Homo sapiens)
Explore Q9UNP9 
Go to UniProtKB:  Q9UNP9
PHAROS:  Q9UNP9
GTEx:  ENSG00000084072 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UNP9
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains LengthOrganismImage
RNA (5'-R(*AP*AP*UP*AP*AP*A)-3')6Homo sapiens
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 250 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swiss National Science FoundationSwitzerland--

Revision History  (Full details and data files)

  • Version 1.0: 2022-04-13
    Type: Initial release
  • Version 1.1: 2023-05-03
    Changes: Database references, Structure summary
  • Version 1.2: 2024-06-19
    Changes: Data collection, Database references