Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At3g18380	May play a role in the recruitment of Pol IV to genomic regions associated with K9 methylated histone H3 that are targets for RdDM.	No verified direct reference in this release
Arabidopsis	At1g15215	Involved in RNA-directed DNA methylation (RdDM).	SHH1, a homeodomain protein required for DNA methylation, as well as RDR2, RDM4, and chromatin remodeling factors, associate with RNA polymerase IV.; 2011; DOI: 10.1371/journal.pgen.1002195; PMID: 21811420; https://pubmed.ncbi.nlm.nih.gov/21811420/ | An atypical component of RNA-directed DNA methylation machinery has both DNA methylation-dependent and -independent roles in locus-specific transcriptional gene silencing.; 2011; DOI: 10.1038/cr.2011.173; PMID: 22064704; https://pubmed.ncbi.nlm.nih.gov/22064704/ | Polymerase IV occupancy at RNA-directed DNA methylation sites requires SHH1.; 2013; DOI: 10.1038/nature12178; PMID: 23636332; https://pubmed.ncbi.nlm.nih.gov/23636332/ | DTF1 is a core component of RNA-directed DNA methylation and may assist in the recruitment of Pol IV.; 2013; DOI: 10.1073/pnas.1300585110; PMID: 23637343; https://pubmed.ncbi.nlm.nih.gov/23637343/