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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 ...
The 3 substrates of this enzyme are ATP, aspartyl-tRNA(Asn), and L-glutamine, whereas its 4 products are ADP, phosphate, asparaginyl-tRNA(Asn), and L-glutamate. This enzyme belongs to the family of ligases , specifically those forming carbon-nitrogen bonds carbon-nitrogen ligases with glutamine as amido-N-donor.
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.
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 .
66514 Ensembl ENSG00000162174 ENSMUSG00000024654 UniProt Q7L266 Q8C0M9 RefSeq (mRNA) NM_001083926 NM_025080 NM_025610 RefSeq (protein) NP_001077395 NP_079356 NP_079886 Location (UCSC) Chr 11: 62.34 – 62.39 Mb Chr 19: 9.09 – 9.11 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse L-asparaginase is an enzyme that in humans is encoded by the ASRGL1 gene. Function The ASRGL1 protein ...
In enzymology, a glutamin-(asparagin-)ase (EC 3.5.1.38) is an enzyme that catalyzes the chemical reaction. L-glutamine + H 2 O L-glutamate + NH 3. Thus, the two substrates of this enzyme are L-glutamine and H 2 O, whereas its two products are L-glutamate and NH 3.