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Information on EC - glutaminyl-tRNA synthase (glutamine-hydrolysing)

for references in articles please use BRENDA:EC6.3.5.7
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IUBMB Comments
In systems lacking discernible glutamine---tRNA ligase (EC, glutaminyl-tRNAGln is formed by a two-enzyme system. In the first step, a nondiscriminating ligase (EC, glutamate---tRNAGln ligase) mischarges tRNAGln with glutamate, forming glutamyl-tRNAGln. The glutamyl-tRNAGln is not used in protein synthesis until the present enzyme converts it into glutaminyl-tRNAGln (glutamyl-tRNAGlu is not a substrate for this reaction). Ammonia or asparagine can substitute for the preferred substrate glutamine.
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The expected taxonomic range for this enzyme is: Bacteria, Eukaryota, Archaea
gatde, glu-adt, gatcab amidotransferase, qrsl1, glu-trnagln amidotransferase, glutamyl-trnagln amidotransferase, glutamyl-trna(gln) amidotransferase, amidotransferase b, more
ATP + L-glutamyl-tRNAGln + L-glutamine = ADP + phosphate + L-glutaminyl-tRNAGln + L-glutamate
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