2.4.2.29: tRNA-guanosine34 preQ1 transglycosylase
This is an abbreviated version!
For detailed information about tRNA-guanosine34 preQ1 transglycosylase, go to the full flat file.
Word Map on EC 2.4.2.29
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2.4.2.29
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anticodon
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queuosine
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wobble
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mobilis
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trnatyr
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shigella
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zymomonas
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hypermodified
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archaeosine
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shigellosis
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preq0
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trna-modifying
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trnaasn
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trnahis
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7-cyano-7-deazaguanine
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minihelix
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7-deazaguanosine
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garcia
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medicine
- 2.4.2.29
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anticodon
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queuosine
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wobble
- mobilis
- trnatyr
- shigella
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zymomonas
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hypermodified
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archaeosine
- shigellosis
- preq0
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trna-modifying
- trnaasn
- trnahis
- 7-cyano-7-deazaguanine
- minihelix
- 7-deazaguanosine
- garcia
- medicine
Reaction
Synonyms
ArcTGT, guanine insertion enzyme, guanine, queuine-tRNA transglycosylase, Q-insertase, QTRT1, QueTGT, queuine insertase, queuine tRNA ribosyltransferase, queuine tRNA-ribosyltransferase, queuine tRNA-ribosyltransferase subunit 1, ribosyltransferase, queuine transfer ribonucleate, TGT, transfer ribonucleate glycosyltransferase, tRNA guanine transglycosidase, tRNA guanine transglycosylase, tRNA transglycosylase, tRNA-guanine 34 transglycosylase, tRNA-guanine transglycosylase, tRNA–guanine transglycosylase, virulence-associated protein VACC
ECTree
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Substrates Products
Substrates Products on EC 2.4.2.29 - tRNA-guanosine34 preQ1 transglycosylase
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REACTION DIAGRAM
2-amino-5-(fluoromethyl)pyrrolo[2,3-d]pyrimidin-4(3H)-one + tRNAguanine
guanine + tRNA2-amino-5-(fluoromethyl)pyrrolo[2,3-d]pyrimidin-4(3H)-one
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2-amino-5-(fluoromethyl)pyrrolo[2,3-d]pyrimidin-4(3H)-one appears to partition between: 1. normal turnover, 2. inactivation, 3. an alternative processing to an unidentrified fluoride-released product
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?
7-(cyano)-7-deazaguanine + tRNAguanine
guanine + tRNA(7-(cyano)-7-deazaguanine)
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inserted 7-(cyano)-7-deazaguanine is located in the first position of the anticodon
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7-aminomethyl-7-carbaguanine + [RNAECYMA]-2'-deoxyguanine 34
guanine + [RNAECYMA]-2'-deoxy-pre Q1
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TGT-RNA covalent intermediate
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7-aminomethyl-7-carbaguanine + [RNAECYMA]-guanine
guanine + [RNAECYMA]-pre Q1
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hairpin RNA corresponding to the tRNAtyr anticodon stem-loop motif, TGT-RNA covalent intermediate
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guanine34 in tRNA + 7-aminomethyl-7-carbaguanine
7-aminomethyl-7-carbaguanine34 in tRNA + guanine
pre-queuine 1 + virF mRNA
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TGT may modulate the translation of VirF via modification of the virF mRNA
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[tRNATyr]7-aminomethyl-7-carbaguanine + guanine
[tRNATyr]-guanine + 7-aminomethyl-7-carbaguanine
guanine + [tRNA]-pre Q1
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the TGT-RNA covalent complex is kinetically capable of occurring on the TGT reaction pathway. Dissociation of product RNA from the enzyme is overall rate-limiting in the steady state. Role for the 2'-hydroxyl group of the ribose in the TGT reaction
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7-aminomethyl-7-carbaguanine + [tRNA]-guanine
guanine + [tRNA]-pre Q1
Tyr106 in the active site is hydrogen bonded in the ligand-free structure
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7-aminomethyl-7-carbaguanine34 in tRNA + guanine
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guanine34 in tRNA + 7-aminomethyl-7-carbaguanine
7-aminomethyl-7-carbaguanine34 in tRNA + guanine
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guanine34 in tRNA + 7-aminomethyl-7-carbaguanine
7-aminomethyl-7-carbaguanine34 in tRNA + guanine
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E. coli preQ0-tRNATyr, containing7-(cyano)-7-deazaguanine in the anticodon and E. coli guaninetRNATyr containing guanosine in the anticodon are good acceptors
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ir
guanine34 in tRNA + 7-aminomethyl-7-carbaguanine
7-aminomethyl-7-carbaguanine34 in tRNA + guanine
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the enzyme catalyzes the posttranscriptional base exchange of the queuosine precursor 7-(aminomethyl)-7-deazaguanine with the genetically encoded guanine in tRNAASp, tRNAAsn, tRNAHis and tRNATyr
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?
guanine34 in tRNA + 7-aminomethyl-7-carbaguanine
7-aminomethyl-7-carbaguanine34 in tRNA + guanine
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the enzyme exchanges the genetically encoded guanine at position 34 with a queuine precursor 7-(aminomethyl)-7-deazaguanine
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?
guanine34 in tRNA + 7-aminomethyl-7-carbaguanine
7-aminomethyl-7-carbaguanine34 in tRNA + guanine
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the enzyme is responsible for the posttranscriptional modification of specific tRNAs (Asn, Asp, His and Tyr) with queuine. The enzyme catalyzes base exchange of guanosine34 with 7-aminomethyl-7-deazaguanine
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guanine34 in tRNA + 7-aminomethyl-7-carbaguanine
7-aminomethyl-7-carbaguanine34 in tRNA + guanine
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guanine34 in tRNA + 7-aminomethyl-7-carbaguanine
7-aminomethyl-7-carbaguanine34 in tRNA + guanine
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guanine34 in tRNA + 7-aminomethyl-7-carbaguanine
7-aminomethyl-7-carbaguanine34 in tRNA + guanine
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guanine34 in tRNA + 7-aminomethyl-7-carbaguanine
7-aminomethyl-7-carbaguanine34 in tRNA + guanine
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the enzyme is involved in the hypermodification of cognate tRNAs, leading to the exchange of G34 by 7-methylamino-7-deazaguanine at the wobble position in the anticodon loop
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guanine34 in tRNA + 7-aminomethyl-7-carbaguanine
7-aminomethyl-7-carbaguanine34 in tRNA + guanine
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guanine34 in tRNA + 7-aminomethyl-7-carbaguanine
7-aminomethyl-7-carbaguanine34 in tRNA + guanine
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guanine34 in tRNA + 7-aminomethyl-7-carbaguanine
7-aminomethyl-7-carbaguanine34 in tRNA + guanine
prefers pre-queuine 1 over pre-queuine 0
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[tRNATyr]-guanine + 7-aminomethyl-7-carbaguanine
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[tRNATyr]7-aminomethyl-7-carbaguanine + guanine
[tRNATyr]-guanine + 7-aminomethyl-7-carbaguanine
TGT active site exhibits a hydrophobic patch formed by Val45 and Leu68, where the phosphate, linking ribose-34 to ribose-35, in bound tRNA is located
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[tRNATyr]7-aminomethyl-7-carbaguanine + guanine
[tRNATyr]-guanine + 7-aminomethyl-7-carbaguanine
Tgt dimer binds specifically to a single tRNA molecule
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additional information
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higher expression of the subunit TGT60KD in cancer cells than in normal cells. The expression levels of the TGT60KD subunit regulate enzyme activity and the level of queuosine. TGT60KD plays significant roles in carcinogenesis
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additional information
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the 60000 Da subunit of the enzyme plays a role in colon carcinogenesis
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?