Selected accession A0A9L0T837; ordinary UniProt record is TrEMBL and cites genome sequencing/submission rather than a gene-specific functional experiment. Human evidence is summarized in the paired human investigation. Sequence comparison records the exact target gaps and transfer limits. The targeted Europe PMC search found no decisive gene-specific horse functional assay warranting a separate horse Edison investigation; general omics/association hits were not counted as mechanistic validation.
DNMT3L is related to de novo DNA methyltransferases but lacks the complete machinery of an active methyltransferase. The 2002 primary study demonstrates interaction with HDAC1, recruitment of deacetylase activity and HDAC-dependent repression, while the 2006 biochemical/cell study shows stimulation of DNMT3B and the importance of its interaction interface. These support enzyme activation and gene regulation independently of a catalytic DNA-methylation claim. Chromatin localization, imprinting, transposon repression and germ-cell developmental consequences should be distinguished by level of mechanism. The selected horse protein covers the entire human sequence and retains its ADD/chromatin-interaction architecture; its N-terminal extension is not an absence of the human core.
Sources: PMID:12202768(https://pubmed.ncbi.nlm.nih.gov/12202768/), PMID:16543361(https://pubmed.ncbi.nlm.nih.gov/16543361/).