@techreport{6b40a021df7747a49c026f7ddf3600a8,
title = "CHROMOMETHYLTRANSFERASE3/ KRYPTONITE maintain the sulfurea paramutation in Solanum lycopersicum",
abstract = "Paramutation involves the transfer of a repressive epigenetic mark from a silent allele to an active homologue and, consequently, non-Mendelian inheritance. In tomato the sulfurea (sulf) paramutation is associated with a high level of CHG hypermethylation in a region overlapping the transcription start site of the SlTAB2 gene that affects chlorophyll synthesis. The CCG sub-context hypermethylation is under-represented at this region relative to CTG or CAG implicating the CHROMOMETHYLTRANSFERASE3 (CMT3) in paramutation at this locus. Consistent with this interpretation, loss of CMT3 function leads to loss of the sulf chlorosis, the associated CHG hypermethylation and paramutation. Loss of KRYPTONITE (KYP) histone methyl transferase function has a similar effect linked to reduced H3K9me2 at the promoter region of SlTAB2 and a shift in higher order chromatin structure at this locus. Mutation of the largest subunit of RNA polymerase V (PolV) in contrast does not affect sulf paramutation. These findings indicate the involvement of a CMT3/KYP dependent feedback rather than the PolV-dependent pathway leading to RNA directed DNA methylation (RdDM) in the maintenance of paramutation.",
keywords = "Heredity, paramutation, epigenetic memory, tomato",
author = "Cl{\'a}udia Martinho and Zhengming Wang and Andrea Ghigi and Sarah Buddle and Felix Barbour and Antonia Yarur and Quentin Gouil and Sebastian M{\"u}ller and Maike Stam and Chang Liu and Baulcombe, {David C.}",
note = "The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license. ",
year = "2021",
month = jul,
day = "1",
doi = "10.1101/2021.07.01.450764",
language = "English",
publisher = "BioRxiv",
address = "United States",
type = "WorkingPaper",
institution = "BioRxiv",
}