(glutamate-ammonia-ligase) adenylyltransferase

In enzymology, a [glutamate-ammonia-ligase] adenylyltransferase (EC 2.7.7.42) is an enzyme that catalyzes the chemical reaction

ATP + [L-glutamate:ammonia ligase (ADP-forming)] diphosphate + adenylyl-[L-glutamate:ammonia ligase (ADP-forming)]

Thus, the two substrates of this enzyme are ATP and [[[L-glutamate:ammonia ligase (ADP-forming)]]], whereas its two products are diphosphate and [[adenylyl-[L-glutamate:ammonia ligase (ADP-forming)]]].

This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing nucleotide groups (nucleotidyltransferases). The systematic name of this enzyme class is ATP:[L-glutamate:ammonia ligase (ADP-forming)] adenylyltransferase. Other names in common use include glutamine-synthetase adenylyltransferase, ATP:glutamine synthetase adenylyltransferase, and adenosine triphosphate:glutamine synthetase adenylyltransferase.

Structural studies

As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code 1V4A.

References

• Ebner E, Wolf D, Gancedo C, Elsasser S, Holzer H (1970). "ATP: glutamine synthetase adenylyltransferase from Escherichia coli B. Purification and properties". Eur. J. Biochem. 14: 535–44. doi:10.1111/j.1432-1033.1970.tb00320.x. PMID 4920894. 
• Kingdon HS, Shapiro BM, Stadtman ER (1967). "Regulation of glutamine synthetase. 8. ATP: glutamine synthetase adenylyltransferase, an enzyme that catalyzes alterations in the regulatory properties of glutamine synthetase". Proc. Natl. Acad. Sci. U. S. A. 58: 1703–10. doi:10.1073/pnas.58.4.1703. PMID 4867671. 
• Mecke D, Wulff K, Liess K, Holzer H (1966). "Characterization of a glutamine synthetase inactivating enzyme from Escherichia coli". Biochem. Biophys. Res. Commun. 24: 452–8. doi:10.1016/0006-291X(66)90182-3. PMID 5338440. 
• Mecke D, Wulff K and Holzer H (1966). "Metabolit-induzierte Inaktivierung von Glutaminsynthetase aus Escherichia coli im zellfreien System". Biochim. Biophys. Acta 128: 559–567. 
• Shapiro BM, Stadtman ER (1968). "5'-adenylyl-O-tyrosine. The novel phosphodiester residue of adenylylated glutamine synthetase from Escherichia coli". J. Biol. Chem. 243: 3769–71. PMID 4298074. 
• Wolf D, Ebner E, Hinze H (1972). "Inactivation, stabilization and some properties of ATP: glutamine synthetase adenylyltransferase from Escherichia coli B". Eur. J. Biochem. 25: 239–44. doi:10.1111/j.1432-1033.1972.tb01689.x. PMID 4402680.