2.1.1.260: rRNA small subunit pseudouridine methyltransferase Nep1
This is an abbreviated version!
For detailed information about rRNA small subunit pseudouridine methyltransferase Nep1, go to the full flat file.
Word Map on EC 2.1.1.260
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2.1.1.260
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rrnas
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jannaschii
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methanocaldococcus
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nucleolus
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hypermodified
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s-adenosylmethionine
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archaea
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three-hybrid
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rna-binding
- 2.1.1.260
- rrnas
- jannaschii
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methanocaldococcus
- nucleolus
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hypermodified
- s-adenosylmethionine
- archaea
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three-hybrid
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rna-binding
Reaction
Synonyms
Bowen-Conradi syndrome protein, Emg1, Emg1p, essential for mitotic growth 1, N1-specific pseudouridine methyltransferase, Nep1, Nep1 methyltransferase, Nep1p, nucleolar essential protein 1, pseudouridine N1-methyltransferase, pseudouridine-N1-specific methyltransferase
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Substrates Products
Substrates Products on EC 2.1.1.260 - rRNA small subunit pseudouridine methyltransferase Nep1
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REACTION DIAGRAM
S-adenosyl-L-methionine + pseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
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S-adenosyl-L-methionine + pseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-methionine binding structure, overview
S-adenosyl-L-homocysteine binding structure, overview
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S-adenosyl-L-methionine + pseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
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S-adenosyl-L-methionine + pseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
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RNA-oligonucleotides corresponding to nucleotides 1245-1255 of human 18S rRNA and containing pseudouridine (5'-GACWCAACACG-3') at position 1248. This position corresponds to nucleotide 914 of Methanocaldococcus jannaschii 16S rRNA and to nt 1191 of yeast 18S rRNA
product identification by MALDI-mass spectrometrical analysis
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S-adenosyl-L-methionine + pseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
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S-adenosyl-L-methionine + pseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
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S-adenosyl-L-methionine + pseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
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product identification by 1H-NMR-spectroscopy
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S-adenosyl-L-methionine + pseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-methionine binding site structure, overview
S-adenosyl-L-homocysteine binds to Nep1 at a preformed binding site that is topologically equivalent to the cofactor binding site in other SPOUT-class methyltransferases, intermolecular interactions, overview
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S-adenosyl-L-methionine + pseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
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S-adenosyl-L-methionine + pseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-methionine binding site structure, overview
S-adenosyl-L-homocysteine binds to Nep1 at a preformed binding site that is topologically equivalent to the cofactor binding site in other SPOUT-class methyltransferases, intermolecular interactions, overview
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S-adenosyl-L-methionine + pseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
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S-adenosyl-L-methionine + pseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
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Nep1 catalyzes the psi1191 methylation in vivo. The in vivo target site for Nep1-catalyzed methylation is located within loop 35 of the 18S rRNA that contains the unique hypermodification of U1191 to 1-methyl-3-(3-amino-3-carboxypropyl)-pseudouridine
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S-adenosyl-L-methionine + pseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
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S-adenosyl-L-methionine binding structure, overview
S-adenosyl-L-homocysteine binding structure, overview
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S-adenosyl-L-methionine + pseudouridine1191 in yeast 18S rRNA
S-adenosyl-L-homocysteine + N1-methylpseudouridine1191 in yeast 18S rRNA
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RNA-binding specificity by in vitro using fluorescence quenching assays and yeast three-hybrid screening. Identification of the binding site for methylation target RNAs by NMR-spectroscopy, overview
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additional information
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the Methanocaldococcus jannaschii Nep1 binds to the Saccharomyces cerevisiae Nep1 RNA consensus sequence 5'-UUCAAC-3' in the Methanocaldococcus jannaschii 16S rRNA. The region of Methanocaldococcus jannaschii 16S rRNA is equivalent to nt 1190-1195 in yeast 18S rRNA including the m1acp3-psi nucleotide at position 1191. And binding of MjNep1 to a 6mer RNA containing the consensus sequence 5'-UUCAAC-3'. Even a 5'-truncated RNA lacking the first uridine of the consensus sequence is bound with comparable affinity. RNA-binding specificity by in vitro using fluorescence quenching assays and yeast three-hybrid screening. Identification of the binding site for methylation target RNAs by NMR-spectroscopy, overview
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additional information
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Nep1 target site identification by mass spectrometry, isotope-labeling, and fluorescence anisotropy measurements
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