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Title: Structural basis for DNMT3A-mediated de novo DNA methylation

Journal Article · · Nature (London)
DOI:https://doi.org/10.1038/nature25477· OSTI ID:1433691
 [1];  [2];  [3];  [3];  [2];  [3];  [3];  [3];  [4];  [3];  [2];  [3]
  1. Jinan Univ., Guangzhou (China); Univ. of California, Riverside, CA (United States)
  2. Univ. of North Carolina, Chapel Hill, NC (United States)
  3. Univ. of California, Riverside, CA (United States)
  4. Univ. of North Carolina, Chapel Hill, NC (United States); Van Andel Research Inst., Grand Rapids, MI (United States)

DNA methylation by de novo DNA methyltransferases 3A (DNMT3A) and 3B (DNMT3B) at cytosines is essential for genome regulation and development. Dysregulation of this process is implicated in various diseases, notably cancer. However, the mechanisms underlying DNMT3 substrate recognition and enzymatic specificity remain elusive. Here we report a 2.65-ångström crystal structure of the DNMT3A–DNMT3L–DNA complex in which two DNMT3A monomers simultaneously attack two cytosine–phosphate–guanine (CpG) dinucleotides, with the target sites separated by 14 base pairs within the same DNA duplex. The DNMT3A–DNA interaction involves a target recognition domain, a catalytic loop, and DNMT3A homodimeric interface. Arg836 of the target recognition domain makes crucial contacts with CpG, ensuring DNMT3A enzymatic preference towards CpG sites in cells. Haematological cancer-associated somatic mutations of the substrate-binding residues decrease DNMT3A activity, induce CpG hypomethylation, and promote transformation of haematopoietic cells. Together, our study reveals the mechanistic basis for DNMT3A-mediated DNA methylation and establishes its aetiological link to human disease.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC); UNC Cancer Center Core Support; Gabrielle’s Angel Foundation for Cancer Research; Univ. Cancer Research Fund of the N.C. state; National Inst. of Health
Grant/Contract Number:
P30-CA016086; 1R35GM119721; R35GM124736; 5R21ES025392; 1R01CA215284; 1R01CA218600; 1R01CA211336
OSTI ID:
1433691
Journal Information:
Nature (London), Vol. 554, Issue 7692; ISSN 0028-0836
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 142 works
Citation information provided by
Web of Science

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Cited By (21)

Mutations of R882 change flanking sequence preferences of the DNA methyltransferase DNMT3A and cellular methylation patterns journal October 2019
Dynamic Evolution of De Novo DNA Methyltransferases in Rodent and Primate Genomes journal February 2020
Effect of Disease-Associated Germline Mutations on Structure Function Relationship of DNA Methyltransferases journal May 2019
Fates of CD8+ T cells in Tumor Microenvironment journal January 2019
Chromatin regulatory mechanisms and therapeutic opportunities in cancer journal January 2019
The finger loop of the SRA domain in the E3 ligase UHRF1 is a regulator of ubiquitin targeting and is required for the maintenance of DNA methylation journal September 2019
The genetic and molecular pathogenesis of myelodysplastic syndromes journal July 2018
Engineering of Effector Domains for Targeted DNA Methylation with Reduced Off-Target Effects journal January 2020
Genetic variation of DNA methyltransferase-3A contributes to protection against persistent MRSA bacteremia in patients journal September 2019
Structural Basis of DNMT1 and DNMT3A-Mediated DNA Methylation journal December 2018
Role of DNA Methylation in the Development and Differentiation of Intestinal Epithelial Cells and Smooth Muscle Cells journal July 2019
Mammalian DNA methyltransferases: new discoveries and open questions journal August 2018
Molecular Processes Connecting DNA Methylation Patterns with DNA Methyltransferases and Histone Modifications in Mammalian Genomes journal May 2019
A DNA aptamer for binding and inhibition of DNA methyltransferase 1 journal November 2019
The DNMT3A R882H mutation does not cause dominant negative effects in purified mixed DNMT3A/R882H complexes collection January 2018
The R882H substitution in the human de novo DNA methyltransferase DNMT3A disrupts allosteric regulation by the tumor supressor p53 journal October 2019
Epigenetic mechanisms are behind the regulation of the key genes associated with the osteoblastic differentiation of the mesenchymal stem cells: The role of zoledronic acid on tuning the epigenetic changes journal January 2019
Understanding the R882H mutation effects of DNA methyltransferase DNMT3A: a combination of molecular dynamics simulations and QM/MM calculations journal January 2019
The DNMT3A R882H mutation does not cause dominant negative effects in purified mixed DNMT3A/R882H complexes journal September 2018
Molecular Processes Connecting DNA Methylation Patterns with DNA Methyltransferases and Histone Modifications in Mammalian Genomes journal November 2018
DNA methylation and de-methylation using hybrid site-targeting proteins journal November 2018

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