Rfam (http://rfam.org, PMID:29112718) is a database of non-coding RNA families which are manually annotated with GO terms by Rfam curators. RNAcentral (http://rnacentral.org, PMID:27794554) maintains a comprehensive collection of non-coding RNA sequences that are regularly annotated with Rfam families using the Infernal software (PMID:24008419). When a non-coding RNA sequence is matched to one or more Rfam families by sequence similarity, the GO terms associated with the Rfam family are transitively assigned to the non-coding RNA sequence. Annotations resulting from the transfer of GO terms are assigned the  ECO:0000256  evidence code (match to sequence model evidence used in automatic assertion) and include RNAcentral and Rfam accessions. The annotations are available on the GOA and EMBL-EBI FTP sites.