Enzymes
| UniProtKB help_outline | 3,244 proteins |
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Reaction participants Show >> << Hide
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Namehelp_outline
uridine44 in tRNASer
Identifier
RHEA-COMP:10339
Reactive part
help_outline
- Name help_outline UMP residue Identifier CHEBI:65315 Charge -1 Formula C9H10N2O8P Positionhelp_outline 44 SMILEShelp_outline C1=CC(NC(N1[C@@H]2O[C@H](COP(*)(=O)[O-])[C@H]([C@H]2O)O*)=O)=O 2D coordinates Mol file for the small molecule Search links Involved in 73 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 904 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
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Namehelp_outline
2'-O-methyluridine44 in tRNASer
Identifier
RHEA-COMP:10340
Reactive part
help_outline
- Name help_outline 2'-O-methyluridine 5'-phosphate residue Identifier CHEBI:74478 Charge -1 Formula C10H12N2O8P Positionhelp_outline 44 SMILEShelp_outline [C@@H]1(N2C(NC(=O)C=C2)=O)O[C@H](COP(*)(=O)[O-])[C@H]([C@H]1OC)O* 2D coordinates Mol file for the small molecule Search links Involved in 8 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 827 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 9,521 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:43100 | RHEA:43101 | RHEA:43102 | RHEA:43103 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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More general form(s) of this reaction
Publications
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Identification of yeast tRNA Um(44) 2'-O-methyltransferase (Trm44) and demonstration of a Trm44 role in sustaining levels of specific tRNA(Ser) species.
Kotelawala L., Grayhack E.J., Phizicky E.M.
A characteristic feature of tRNAs is the numerous modifications found throughout their sequences, which are highly conserved and often have important roles. Um(44) is highly conserved among eukaryotic cytoplasmic tRNAs with a long variable loop and unique to tRNA(Ser) in yeast. We show here that t ... >> More
A characteristic feature of tRNAs is the numerous modifications found throughout their sequences, which are highly conserved and often have important roles. Um(44) is highly conserved among eukaryotic cytoplasmic tRNAs with a long variable loop and unique to tRNA(Ser) in yeast. We show here that the yeast ORF YPL030w (now named TRM44) encodes tRNA(Ser) Um(44) 2'-O-methyltransferase. Trm44 was identified by screening a yeast genomic library of affinity purified proteins for activity and verified by showing that a trm44-delta strain lacks 2'-O-methyltransferase activity and has undetectable levels of Um(44) in its tRNA(Ser) and by showing that Trm44 purified from Escherichia coli 2'-O-methylates U(44) of tRNA(Ser) in vitro. Trm44 is conserved among metazoans and fungi, consistent with the conservation of Um(44) in eukaryotic tRNAs, but surprisingly, Trm44 is not found in plants. Although trm44-delta mutants have no detectable growth defect, TRM44 is required for survival at 33 degrees C in a tan1-delta mutant strain, which lacks ac(4)C12 in tRNA(Ser) and tRNA(Leu). At nonpermissive temperature, a trm44-delta tan1-delta mutant strain has reduced levels of tRNA(Ser(CGA)) and tRNA(Ser(UGA)), but not other tRNA(Ser) or tRNA(Leu) species. The trm44-delta tan1-delta growth defect is suppressed by addition of multiple copies of tRNA(Ser(CGA)) and tRNA(Ser(UGA)), directly implicating these tRNA(Ser) species in this phenotype. The reduction of specific tRNA(Ser) species in a trm44-delta tan1-delta mutant underscores the importance of tRNA modifications in sustaining tRNA levels and further emphasizes that tRNAs undergo quality control. << Less