Enzymes
| UniProtKB help_outline | 3 proteins |
| Enzyme class help_outline |
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Reaction participants Show >> << Hide
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Namehelp_outline
adenosine1408 in 16S rRNA
Identifier
RHEA-COMP:10228
Reactive part
help_outline
- Name help_outline AMP residue Identifier CHEBI:74411 Charge -1 Formula C10H11N5O6P Positionhelp_outline 1408 SMILEShelp_outline NC1=NC=NC2=C1N=CN2[C@@H]3O[C@H](COP(=O)(*)[O-])[C@@H](O*)[C@H]3O 2D coordinates Mol file for the small molecule Search links Involved in 40 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline S-adenosyl-L-methionine Identifier CHEBI:59789 Charge 1 Formula C15H23N6O5S InChIKeyhelp_outline MEFKEPWMEQBLKI-AIRLBKTGSA-O SMILEShelp_outline C[S+](CC[C@H]([NH3+])C([O-])=O)C[C@H]1O[C@H]([C@H](O)[C@@H]1O)n1cnc2c(N)ncnc12 2D coordinates Mol file for the small molecule Search links Involved in 868 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H+ Identifier CHEBI:15378 Charge 1 Formula H InChIKeyhelp_outline GPRLSGONYQIRFK-UHFFFAOYSA-N SMILEShelp_outline [H+] 2D coordinates Mol file for the small molecule Search links Involved in 9,431 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
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Namehelp_outline
N1-methyladenosine1408 in 16S rRNA
Identifier
RHEA-COMP:10227
Reactive part
help_outline
- Name help_outline N1-methyladenosine 5'-phosphate residue Identifier CHEBI:74491 Charge -1 Formula C11H13N5O6P Positionhelp_outline 1408 SMILEShelp_outline N1(C=NC2=C(N=CN2[C@@H]3O[C@H](COP(*)(=O)[O-])[C@H]([C@H]3O)O*)C1=N)C 2D coordinates Mol file for the small molecule Search links Involved in 12 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline S-adenosyl-L-homocysteine Identifier CHEBI:57856 Charge 0 Formula C14H20N6O5S InChIKeyhelp_outline ZJUKTBDSGOFHSH-WFMPWKQPSA-N SMILEShelp_outline Nc1ncnc2n(cnc12)[C@@H]1O[C@H](CSCC[C@H]([NH3+])C([O-])=O)[C@@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 792 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:42776 | RHEA:42777 | RHEA:42778 | RHEA:42779 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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Publications
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Cloning of an aminoglycoside-resistance-encoding gene, kamC, from Saccharopolyspora hirsuta: comparison with kamB from Streptomyces tenebrarius.
Holmes D.J., Drocourt D., Tiraby G., Cundiffe E.
An aminoglycoside-resistance-encoding gene (kamC) has been isolated from the sporaricin producer, Saccharopolyspora (Sac.) hirsuta, and expressed both in Streptomyces lividans and Escherichia coli. The pattern of resistance conferred by this gene was identical to that given by another gene (kamB) ... >> More
An aminoglycoside-resistance-encoding gene (kamC) has been isolated from the sporaricin producer, Saccharopolyspora (Sac.) hirsuta, and expressed both in Streptomyces lividans and Escherichia coli. The pattern of resistance conferred by this gene was identical to that given by another gene (kamB) previously isolated from Streptomyces tenebrarius. In accordance with the known action of the kamB product, the Sac, hirsuta determinant also encodes a methyltransferase that modifies 16S rRNA, thereby rendering ribosomes refractory to certain aminoglycosides. The nucleotide sequences of both genes have been determined and comparison of the deduced amino acid sequences reveals a high degree of similarity. << Less
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Identification of a missing sequence and functionally important residues of 16S rRNA:m(1)A1408 methyltransferase KamB that causes bacterial resistance to aminoglycoside antibiotics.
Koscinski L., Feder M., Bujnicki J.M.
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Novel plasmid-mediated 16S rRNA m1A1408 methyltransferase, NpmA, found in a clinically isolated Escherichia coli strain resistant to structurally diverse aminoglycosides.
Wachino J., Shibayama K., Kurokawa H., Kimura K., Yamane K., Suzuki S., Shibata N., Ike Y., Arakawa Y.
We have isolated a multiple-aminoglycoside-resistant Escherichia coli strain, strain ARS3, and have been the first to identify a novel plasmid-mediated 16S rRNA methyltransferase, NpmA. This new enzyme shared a relatively low level of identity (30%) to the chromosomally encoded 16S rRNA methyltran ... >> More
We have isolated a multiple-aminoglycoside-resistant Escherichia coli strain, strain ARS3, and have been the first to identify a novel plasmid-mediated 16S rRNA methyltransferase, NpmA. This new enzyme shared a relatively low level of identity (30%) to the chromosomally encoded 16S rRNA methyltransferase (KamA) of Streptomyces tenjimariensis, an actinomycete aminoglycoside producer. The introduction of a recombinant plasmid carrying npmA could confer on E. coli consistent resistance to both 4,6-disubstituted 2-deoxystreptamines, such as amikacin and gentamicin, and 4,5-disubstituted 2-deoxystreptamines, including neomycin and ribostamycin. The histidine-tagged NpmA elucidated methyltransferase activity against 30S ribosomal subunits but not against 50S subunits and the naked 16S rRNA molecule in vitro. We further confirmed that NpmA is an adenine N-1 methyltransferase specific for the A1408 position at the A site of 16S rRNA. Drug footprinting data indicated that binding of aminoglycosides to the target site was apparently interrupted by methylation at the A1408 position. These observations demonstrate that NpmA is a novel plasmid-mediated 16S rRNA methyltransferase that provides a panaminoglycoside-resistant nature through interference with the binding of aminoglycosides toward the A site of 16S rRNA through N-1 methylation at position A1408. << Less
Antimicrob. Agents Chemother. 51:4401-4409(2007) [PubMed] [EuropePMC]