Author
Listed:
- Martin Groth
(Cell, and Developmental Biology, University of California Los Angeles)
- Guillaume Moissiard
(Cell, and Developmental Biology, University of California Los Angeles)
- Markus Wirtz
(Centre for Organismal Studies, University of Heidelberg)
- Haifeng Wang
(Basic Forestry and Proteomics Research Center, Haixia Institute of Science and Technology (HIST), Fujian Province Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University)
- Carolina Garcia-Salinas
(Tecnologico de Monterrey, Campus Monterrey)
- Perla A. Ramos-Parra
(Tecnologico de Monterrey, Campus Monterrey)
- Sylvain Bischof
(Cell, and Developmental Biology, University of California Los Angeles)
- Suhua Feng
(Cell, and Developmental Biology, University of California Los Angeles
Eli & Edythe Broad Center of Regenerative Medicine & Stem Cell Research, University of California Los Angeles
Howard Hughes Medical Institute, University of California Los Angeles)
- Shawn J. Cokus
(Cell, and Developmental Biology, University of California Los Angeles)
- Amala John
(Cell, and Developmental Biology, University of California Los Angeles)
- Danielle C. Smith
(Cell, and Developmental Biology, University of California Los Angeles)
- Jixian Zhai
(Cell, and Developmental Biology, University of California Los Angeles)
- Christopher J. Hale
(Cell, and Developmental Biology, University of California Los Angeles)
- Jeff A. Long
(Cell, and Developmental Biology, University of California Los Angeles)
- Ruediger Hell
(Centre for Organismal Studies, University of Heidelberg)
- Rocío I. Díaz de la Garza
(Tecnologico de Monterrey, Campus Monterrey)
- Steven E. Jacobsen
(Cell, and Developmental Biology, University of California Los Angeles
Eli & Edythe Broad Center of Regenerative Medicine & Stem Cell Research, University of California Los Angeles
Howard Hughes Medical Institute, University of California Los Angeles)
Abstract
DNA methylation is an epigenetic mechanism that has important functions in transcriptional silencing and is associated with repressive histone methylation (H3K9me). To further investigate silencing mechanisms, we screened a mutagenized Arabidopsis thaliana population for expression of SDCpro-GFP, redundantly controlled by DNA methyltransferases DRM2 and CMT3. Here, we identify the hypomorphic mutant mthfd1-1, carrying a mutation (R175Q) in the cytoplasmic bifunctional methylenetetrahydrofolate dehydrogenase/methenyltetrahydrofolate cyclohydrolase (MTHFD1). Decreased levels of oxidized tetrahydrofolates in mthfd1-1 and lethality of loss-of-function demonstrate the essential enzymatic role of MTHFD1 in Arabidopsis. Accumulation of homocysteine and S-adenosylhomocysteine, genome-wide DNA hypomethylation, loss of H3K9me and transposon derepression indicate that S-adenosylmethionine-dependent transmethylation is inhibited in mthfd1-1. Comparative analysis of DNA methylation revealed that the CMT3 and CMT2 pathways involving positive feedback with H3K9me are mostly affected. Our work highlights the sensitivity of epigenetic networks to one-carbon metabolism due to their common S-adenosylmethionine-dependent transmethylation and has implications for human MTHFD1-associated diseases.
Suggested Citation
Martin Groth & Guillaume Moissiard & Markus Wirtz & Haifeng Wang & Carolina Garcia-Salinas & Perla A. Ramos-Parra & Sylvain Bischof & Suhua Feng & Shawn J. Cokus & Amala John & Danielle C. Smith & Jix, 2016.
"MTHFD1 controls DNA methylation in Arabidopsis,"
Nature Communications, Nature, vol. 7(1), pages 1-13, September.
Handle:
RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11640
DOI: 10.1038/ncomms11640
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