CATH Classification

Domain Context

CATH Clusters

Superfamily DNA helicase RuvA subunit, C-terminal domain
Functional Family

Enzyme Information

2.1.1.179
16S rRNA (guanine(1405)-N(7))-methyltransferase.
based on mapping to UniProt Q7M0R2
S-adenosyl-L-methionine + guanine(1405) in 16S rRNA = S-adenosyl-L- homocysteine + N(7)-methylguanine(1405) in 16S rRNA.
-!- The enzyme from the antibiotic-producing bacterium Micromonospora zionensis specifically methylates guanine(1405) at N(7) in 16S rRNA, thereby rendering the ribosome resistant to 4,6-disubstituted deoxystreptamine aminoglycosides, which include gentamicins and kanamycins.

UniProtKB Entries (1)

Q7M0R2
SGM_MICZI
Micromonospora zionensis
16S rRNA (guanine(1405)-N(7))-methyltransferase

PDB Structure

PDB 3LCU
External Links
Method X-RAY DIFFRACTION
Organism
Primary Citation
Structural basis for the methylation of G1405 in 16S rRNA by aminoglycoside resistance methyltransferase Sgm from an antibiotic producer: a diversity of active sites in m7G methyltransferases.
Husain, N., Tkaczuk, K.L., Tulsidas, S.R., Kaminska, K.H., Cubrilo, S., Maravic-Vlahovicek, G., Bujnicki, J.M., Sivaraman, J.
Nucleic Acids Res.
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