A brown algal virus genome contains a "RING" zinc finger motif.

The brown filamentous alga Feldmannia sp. contains a large icosahedral dsDNA virus, FsV, of which there are multiple variants. A 4.5-kb SstI-HindIII fragment (SH4.5) that is conserved among all genome variants was sequenced. Three open reading frames (ORF-1, -2, and -3, containing 555, 2022, and 411 bp, respectively) were shown to be transcriptionally active by ribonuclease protection assay. A "RING" zinc finger motif and a nucleotide binding site motif were identified in ORF-2.