Enables rRNA (guanine) methyltransferase activity. Involved in endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA); rRNA (guanine-N7)-methylation; and ribosomal small subunit export from nucleus. Located in nucleolus. Human ortholog(s) of this gene implicated in Williams-Beuren syndrome. Orthologous to human BUD23 (BUD23 rRNA methyltransferase and ribosome maturation factor).
SGD Description
Ribosome biogenesis factor; methyltransferase that methylates residue G1575 of 18S rRNA; required for rRNA processing and nuclear export of 40S ribosomal subunits independently of methylation activity; required for recruitment of Rps2p; functions with DEAH-box RNA helicase Ecm16p; diploid mutant displays random budding pattern; functional homolog of human WBSCR22