Part of the 50S ribosomal subunit (PubMed:786732, PubMed:10094780, PubMed:12809609, PubMed:16272117, PubMed:25310980, PubMed:24844575, PubMed:27934701, PubMed:27906160, PubMed:27906161). Cross-links to the P and E site tRNAs (PubMed:8524654). Surface exposed on the 50S subunit. Belongs to the bacterial ribosomal protein bL33 family.