7L4Y

YTH Domain of Human YTHDC1 with dsDNA Comprising Single N6mA joined by Two Six-bp DNA Duplexes in P212121 Crystal


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Human MettL3-MettL14 RNA adenine methyltransferase complex is active on double-stranded DNA containing lesions.

Yu, D.Horton, J.R.Yang, J.Hajian, T.Vedadi, M.Sagum, C.A.Bedford, M.T.Blumenthal, R.M.Zhang, X.Cheng, X.

(2021) Nucleic Acids Res 49: 11629-11642

  • DOI: https://doi.org/10.1093/nar/gkab460
  • Primary Citation of Related Structures:  
    7L4X, 7L4Y

  • PubMed Abstract: 

    MettL3-MettL14 methyltransferase complex has been studied widely for its role in RNA adenine methylation. This complex is also recruited to UV- and X-ray exposed DNA damaged sites, and its methyltransfer activity is required for subsequent DNA repair, though in theory this could result from RNA methylation of short transcripts made at the site of damage. We report here that MettL3-MettL14 is active in vitro on double-stranded DNA containing a cyclopyrimidine dimer - a major lesion of UV radiation-induced products - or an abasic site or mismatches. Furthermore, N6-methyladenine (N6mA) decreases misincorporation of 8-oxo-guanine (8-oxoG) opposite to N6mA by repair DNA polymerases. When 8-oxoG is nevertheless incorporated opposite N6mA, the methylation inhibits N6mA excision from the template (correct) strand by the adenine DNA glycosylase (MYH), implying that the methylation decreases inappropriate misrepair. Finally, we observed that the N6mA reader domain of YTHDC1, which is also recruited to sites of DNA damage, binds N6mA that is located across from a single-base gap between two canonical DNA helices. This YTHDC1 complex with a gapped duplex is structurally similar to DNA complexes with FEN1 and GEN1 - two members of the nuclease family that act in nucleotide excision repair, mismatch repair and homologous recombination, and which incise distinct non-B DNA structures. Together, the parts of our study provide a plausible mechanism for N6mA writer and reader proteins acting directly on lesion-containing DNA, and suggest in vivo experiments to test the mechanisms involving methylation of adenine.


  • Organizational Affiliation

    Department of Epigenetics and Molecular Carcinogenesis, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
YTH domain-containing protein 1166Homo sapiensMutation(s): 0 
Gene Names: YTHDC1KIAA1966YT521
UniProt & NIH Common Fund Data Resources
Find proteins for Q96MU7 (Homo sapiens)
Explore Q96MU7 
Go to UniProtKB:  Q96MU7
PHAROS:  Q96MU7
GTEx:  ENSG00000083896 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ96MU7
Sequence Annotations
Expand
  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains LengthOrganismImage
ssDNA 13merA [auth F],
C [auth E]
13synthetic construct
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download Ideal Coordinates CCD File 
D [auth B]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.968α = 90
b = 66.383β = 90
c = 77.605γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
SERGUIdata collection
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM049245-23

Revision History  (Full details and data files)

  • Version 1.0: 2021-11-03
    Type: Initial release
  • Version 1.1: 2021-12-01
    Changes: Database references
  • Version 1.2: 2023-10-18
    Changes: Data collection, Refinement description