HMM Summary Page: TIGR00048
| Accession | TIGR00048 |
| Name | TIGR00048 |
| Function | 23S rRNA m2A2503 methyltransferase |
| Gene Symbol | rlmN |
| Trusted Cutoff | 236.95 |
| Domain Trusted Cutoff | 236.95 |
| Noise Cutoff | 176.50 |
| Domain Noise Cutoff | 176.50 |
| Isology Type | equivalog |
| EC Number | 2.1.1.- |
| HMM Length | 355 |
| Mainrole Category | Unknown function |
| Subrole Category | Enzymes of unknown specificity |
| Author | Richardson DL, Haft DH |
| Entry Date | Apr 20 1999 2:04PM |
| Last Modified | Feb 14 2011 3:27PM |
| Comment | A Staphylococcus sciuri plasmid-borne member of this family, Cfr, has been identified as essential to transferrable resistance to chloramphenicol and florfenicol by an unknown mechanism. A 14-15 residue cluster with four perfectly conserved Cys residues suggests this protein may be an enzyme with an iron-sulfur cluster. The Cys cluster is part of the radical SAM domain, suggested to provide a general mechanism by which the Fe-S center cleaves S-adenosylmethionine to initiate radical-based catalysis. Members of this family lack apparent transmembrane domains. |
| References | DR PFAM; PF04055; Radical SAM superfamily RN [1] RM PMID:18025251 RT The methyltransferase YfgB/RlmN is responsible for modification of adenosine 2503 in 23S rRNA. RA Toh SM, Xiong L, Bae T, Mankin AS RL RNA. 2008 Jan;14(1):98-106. Epub 2007 Nov 19. RN [2] RM 10952608 RT Identification of a plasmid-borne chloramphenicol-florfenicol resistance gene in Staphylococcus sciuri. RA Schwarz S, Werckenthin C, Kehrenberg C. RL Antimicrob Agents Chemother 2000 Sep;44(9):2530-3 RN [3] RM 11222759 RT Radical SAM, a novel protein superfamily linking unresolved steps in familiar biosynthetic pathways with radical mechanisms: functional characterization using new analysis and information visualization methods. RA Sofia HJ, Chen G, Hetzler BG, Reyes-Spindola JF, Miller NE. RL Nucleic Acids Res 2001 Mar 1;29(5):1097-106 DR HAMAP; MF_01849; 521 of 570 |