. "\"Catalysis of the reaction: ATP + RNA 3'-terminal-phosphate = AMP + diphosphate + RNA terminal-2',3'-cyclic-phosphate.\" [EC:6.5.1.4]" . . "RNA-3'-phosphate cyclase activity" . "RNA 3'-terminal phosphate cyclase activity" . "RNA cyclase activity" . "RNA-3'-phosphate:RNA ligase (cyclizing, AMP-forming)" . "EC:6.5.1.4" . "MetaCyc:RNA-3-PHOSPHATE-CYCLASE-RXN" . . .