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| | ==CRYSTAL STRUCTURE OF ERMC' A RRNA-METHYL TRANSFERASE== | | ==CRYSTAL STRUCTURE OF ERMC' A RRNA-METHYL TRANSFERASE== |
| - | <StructureSection load='2erc' size='340' side='right' caption='[[2erc]], [[Resolution|resolution]] 3.03Å' scene=''> | + | <StructureSection load='2erc' size='340' side='right'caption='[[2erc]], [[Resolution|resolution]] 3.03Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2erc]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"vibrio_subtilis"_ehrenberg_1835 "vibrio subtilis" ehrenberg 1835]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ERC OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ERC FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2erc]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/"vibrio_subtilis"_ehrenberg_1835 "vibrio subtilis" ehrenberg 1835]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ERC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2ERC FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ERMC' ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1423 "Vibrio subtilis" Ehrenberg 1835])</td></tr> | + | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ERMC' ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1423 "Vibrio subtilis" Ehrenberg 1835])</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Transferase Transferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.181, 2.1.1.182, 2.1.1.183 and 2.1.1.184 2.1.1.181, 2.1.1.182, 2.1.1.183 and 2.1.1.184] </span></td></tr> | + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Transferase Transferase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.181, 2.1.1.182, 2.1.1.183 and 2.1.1.184 2.1.1.181, 2.1.1.182, 2.1.1.183 and 2.1.1.184] </span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2erc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2erc OCA], [http://pdbe.org/2erc PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2erc RCSB], [http://www.ebi.ac.uk/pdbsum/2erc PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2erc ProSAT]</span></td></tr> | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2erc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2erc OCA], [https://pdbe.org/2erc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2erc RCSB], [https://www.ebi.ac.uk/pdbsum/2erc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2erc ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/ERM_BACIU ERM_BACIU]] This protein produces a dimethylation of the adenine residue at position 2085 in 23S rRNA, resulting in reduced affinity between ribosomes and macrolide-lincosamide-streptogramin B antibiotics.<ref>PMID:12907737</ref> <ref>PMID:12946350</ref> | + | [[https://www.uniprot.org/uniprot/ERM_BACIU ERM_BACIU]] This protein produces a dimethylation of the adenine residue at position 2085 in 23S rRNA, resulting in reduced affinity between ribosomes and macrolide-lincosamide-streptogramin B antibiotics.<ref>PMID:12907737</ref> <ref>PMID:12946350</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Vibrio subtilis ehrenberg 1835]] | | [[Category: Vibrio subtilis ehrenberg 1835]] |
| | + | [[Category: Large Structures]] |
| | [[Category: Transferase]] | | [[Category: Transferase]] |
| | [[Category: Abad-Zapatero, C]] | | [[Category: Abad-Zapatero, C]] |
| Structural highlights
Function
[ERM_BACIU] This protein produces a dimethylation of the adenine residue at position 2085 in 23S rRNA, resulting in reduced affinity between ribosomes and macrolide-lincosamide-streptogramin B antibiotics.[1] [2]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The prevalent mechanism of bacterial resistance to erythromycin and other antibiotics of the macrolide-lincosamide-streptogramin B group (MLS) is methylation of the 23S rRNA component of the 50S subunit in bacterial ribosomes. This sequence-specific methylation is catalyzed by the Erm group of methyltransferases (MTases). They are found in several strains of pathogenic bacteria, and ErmC is the most studied member of this class. The crystal structure of ErmC' (a naturally occurring variant of ErmC) from Bacillus subtilis has been determined at 3.0 A resolution by multiple anomalous diffraction phasing methods. The structure consists of a conserved alpha/beta amino-terminal domain which binds the cofactor S-adenosyl-l-methionine (SAM), followed by a smaller, alpha-helical RNA-recognition domain. The beta-sheet structure of the SAM-binding domain is well-conserved between the DNA, RNA, and small-molecule MTases. However, the C-terminal nucleic acid binding domain differs from the DNA-binding domains of other MTases and is unlike any previously reported RNA-recognition fold. A large, positively charged, concave surface is found at the interface of the N- and C-terminal domains and is proposed to form part of the protein-RNA interaction surface. ErmC' exhibits the conserved structural motifs previously found in the SAM-binding domain of other methyltransferases. A model of SAM bound to ErmC' is presented which is consistent with the motif conservation among MTases.
Crystal structure of ErmC', an rRNA methyltransferase which mediates antibiotic resistance in bacteria.,Bussiere DE, Muchmore SW, Dealwis CG, Schluckebier G, Nienaber VL, Edalji RP, Walter KA, Ladror US, Holzman TF, Abad-Zapatero C Biochemistry. 1998 May 19;37(20):7103-12. PMID:9585521[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Maravic G, Bujnicki JM, Feder M, Pongor S, Flogel M. Alanine-scanning mutagenesis of the predicted rRNA-binding domain of ErmC' redefines the substrate-binding site and suggests a model for protein-RNA interactions. Nucleic Acids Res. 2003 Aug 15;31(16):4941-9. PMID:12907737
- ↑ Maravic G, Feder M, Pongor S, Flogel M, Bujnicki JM. Mutational analysis defines the roles of conserved amino acid residues in the predicted catalytic pocket of the rRNA:m6A methyltransferase ErmC'. J Mol Biol. 2003 Sep 5;332(1):99-109. PMID:12946350
- ↑ Bussiere DE, Muchmore SW, Dealwis CG, Schluckebier G, Nienaber VL, Edalji RP, Walter KA, Ladror US, Holzman TF, Abad-Zapatero C. Crystal structure of ErmC', an rRNA methyltransferase which mediates antibiotic resistance in bacteria. Biochemistry. 1998 May 19;37(20):7103-12. PMID:9585521 doi:10.1021/bi973113c
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