CATH Classification
| Level | CATH Code | Description |
|---|---|---|
|
3 | Alpha Beta |
|
3.40 | 3-Layer(aba) Sandwich |
|
3.40.50 | Rossmann fold |
|
3.40.50.12160 | Methylthiotransferase, N-terminal domain |
Domain Context
CATH Clusters
| Superfamily | Methylthiotransferase, N-terminal domain |
| Functional Family | Ribosomal protein S12 methylthiotransferase RimO |
Enzyme Information
| 2.8.4.4 |
[Ribosomal protein S12] (aspartate(89)-C(3))-methylthiotransferase.
based on mapping to UniProt Q9X2H6
L-aspartate-[ribosomal protein S12] + sulfur-(sulfur carrier) + 2 S-adenosyl-L-methionine = 3-methylthio-L-aspartate-[ribosomal protein S12] + S-adenosyl-L-homocysteine + (sulfur carrier) + L-methionine + 5'-deoxyadenosine.
-!- This bacterial enzyme binds two [4Fe-4S] clusters. -!- A bridge of five sulfur atoms is formed between the free Fe atoms of the two [4Fe-4S] clusters. -!- In the first reaction the enzyme transfers a methyl group from AdoMet to the external sulfur ion of the sulfur bridge. -!- In the second reaction the enzyme catalyzes the reductive fragmentation of a second molecule of AdoMet, yielding a 5'-deoxyadenosine radical, which then attacks the methylated sulfur atom of the polysulfide bridge, resulting in the transfer of a methylsulfanyl group to aspartate(89) (Escherichia coli numbering). -!- The enzyme is a member of the superfamily of S-adenosyl-L-methionine- dependent radical (radical AdoMet) enzymes.
|
UniProtKB Entries (1)
| Q9X2H6 |
RIMO_THEMA
Thermotoga maritima MSB8
Ribosomal protein S12 methylthiotransferase RimO
|
PDB Structure
| PDB | 4JC0 |
| External Links | |
| Method | X-RAY DIFFRACTION |
| Organism | |
| Primary Citation |
Two Fe-S clusters catalyze sulfur insertion by radical-SAM methylthiotransferases.
Nat.Chem.Biol.
|
