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Asparagine synthetase (or aspartate-ammonia ligase) is a chiefly cytoplasmic enzyme that generates asparagine from aspartate. [1] This amidation reaction is similar to that promoted by glutamine synthetase. The enzyme is ubiquitous in its distribution in mammalian organs, but basal expression is relatively low in tissues other than the exocrine ...
Asparagine synthase (glutamine-hydrolysing) (EC 6.3.5.4, asparagine synthetase (glutamine-hydrolysing), glutamine-dependent asparagine synthetase, asparagine synthetase B, AS, AS-B) is an enzyme with systematic name L-aspartate:L-glutamine amido-ligase (AMP-forming).
Asparagine (symbol Asn or N [2]) is an α-amino acid that is used in the biosynthesis of proteins.It contains an α-amino group (which is in the protonated −NH + 3 form under biological conditions), an α-carboxylic acid group (which is in the deprotonated −COO − form under biological conditions), and a side chain carboxamide, classifying it as a polar (at physiological pH), aliphatic ...
In the asparagine synthetase reaction, ATP is used to activate aspartate, forming β-aspartyl-AMP. Glutamine donates an ammonium group, which reacts with β-aspartyl-AMP to form asparagine and free AMP. The biosynthesis of aspartate and asparagine from oxaloacetate. Two asparagine synthetases are found in bacteria.
ATP + L-aspartate + NH 3 AMP + diphosphate + L-asparagine The 3 substrates of this enzyme are ATP , L-aspartate , and NH 3 , whereas its 3 products are AMP , diphosphate , and L-asparagine . This enzyme belongs to the family of ligases , specifically those forming carbon-nitrogen bonds as acid-D-ammonia (or amine) ligases (amide synthases).
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The development of JZP-458 as a therapeutic agent for acute lymphoblastic leukemia has achieved significant milestones throughout the years. In 1963, asparaginase (ASNase) was identified as an effective antileukemic agent, and subsequent efforts were made to isolate it from bacterial sources and scale up production for clinical trials. [15]
The systematic name of this enzyme class is L-asparagine:tRNAAsn ligase (AMP-forming). Other names in common use include asparaginyl-tRNA synthetase , asparaginyl-transfer ribonucleate synthetase , asparaginyl transfer RNA synthetase , asparaginyl transfer ribonucleic acid synthetase , asparagyl-transfer RNA synthetase , and asparagine translase .