Homologs of Rru_A1274 from Rhodospirillum rubrum S1H
Radical SAM (NCBI)
SEED: Ribonucleotide reductase of class III (anaerobic), activating protein (EC 1.97.1.4)
92 hits from BLASTp (E < 0.01)
Or try PaperBLAST, fast.genomics, the ENIGMA genome browser, or the comparative fitness browser