Species	Reference gene ID	Possible function	Papers / DOI
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/
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