Protein Variants | Comment | Organism |
---|---|---|
D52A | when the mutant protein is the sole source of Spb1p in the cell (strain YBL4637), it leads to a severe growth defect with a generation time of about 300 min. No formation of 2'-O-methylguanosine2922 | Saccharomyces cerevisiae |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
S-adenosyl-L-methionine + guanosine2922 in 27S pre-rRNA | Saccharomyces cerevisiae | Spb1p is a site-specific 2'-O-ribose RNA MTase that catalyzes the formation of Gm2922, a universally conserved position of the catalytic center of the ribosome that is essential for translation. The enzyme is required for proper assembly of pre-ribosomal particles during the biogenesis of the 60S ribosomal subunit. Specifically methylates the guanosine in position 2922 of the 25S rRNA at the stage of 27S pre-rRNA maturation. Methylates also the uridine in position 2921 in the absence of methylation of this residue guided by snoRNA snR52 at the stage of 35S pre-rRNA maturation. 2'-O-methylguanosine2922 appears at a late processing stage, during the maturation of the 27S pre-rRNA | S-adenosyl-L-homocysteine + 2'-O-methylguanosine2922 in 27S pre-rRNA | - |
? | |
S-adenosyl-L-methionine + uridine2918 in 25S rRNA | Saccharomyces cerevisiae | the enzyme is required for proper assembly of pre-ribosomal particles during the biogenesis of the 60S ribosomal subunit. Specifically methylates the guanosine in position 2922 of the 25S rRNA at the stage of 27S pre-rRNA maturation. Methylates also the uridine in position 2921 in the absence of methylation of this residue guided by snoRNA snR52 at the stage of 35S pre-rRNA maturation | S-adenosyl-L-homocysteine + 2'-O-methyluridine2918 in 25S rRNA | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Saccharomyces cerevisiae | - |
- |
- |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
S-adenosyl-L-methionine + guanosine2922 in 27S pre-rRNA | Spb1p is a site-specific 2'-O-ribose RNA MTase that catalyzes the formation of Gm2922, a universally conserved position of the catalytic center of the ribosome that is essential for translation. The enzyme is required for proper assembly of pre-ribosomal particles during the biogenesis of the 60S ribosomal subunit. Specifically methylates the guanosine in position 2922 of the 25S rRNA at the stage of 27S pre-rRNA maturation. Methylates also the uridine in position 2921 in the absence of methylation of this residue guided by snoRNA snR52 at the stage of 35S pre-rRNA maturation. 2'-O-methylguanosine2922 appears at a late processing stage, during the maturation of the 27S pre-rRNA | Saccharomyces cerevisiae | S-adenosyl-L-homocysteine + 2'-O-methylguanosine2922 in 27S pre-rRNA | - |
? | |
S-adenosyl-L-methionine + uridine2918 in 25S rRNA | the enzyme is required for proper assembly of pre-ribosomal particles during the biogenesis of the 60S ribosomal subunit. Specifically methylates the guanosine in position 2922 of the 25S rRNA at the stage of 27S pre-rRNA maturation. Methylates also the uridine in position 2921 in the absence of methylation of this residue guided by snoRNA snR52 at the stage of 35S pre-rRNA maturation | Saccharomyces cerevisiae | S-adenosyl-L-homocysteine + 2'-O-methyluridine2918 in 25S rRNA | - |
? |
Synonyms | Comment | Organism |
---|---|---|
Spb1p | - |
Saccharomyces cerevisiae |