Fosforibozilaminoimidazolsukcinokarboksamidna sintaza (EC 6.3.2.6, fosforibozilaminoimidazol-sukcinokarboksamidna sintetaza, PurC, SAICAR sintetaza, 4-(N-sukcinokarboksamid)-5-aminoimidazolna sintetaza, 4-((N-sukcinilamino)karbonil)-5-aminoimidazol ribonukleotidna sintetaza, SAICARs, fosforibozilaminoimidazolsukcinokarboksamidna sintetaza, 5-aminoimidazol-4-N-sukcinokarboksamid ribonukleotid sintetaza) je enzim sa sistematskim imenom 5-amino-1-(5-fosfo-D-ribozil)imidazol-4-karboksilat:L-aspartat ligaza (formira ADP).[1][2][3][4][5][6] Ovaj enzim katalizuje sledeću hemijsku reakciju
- ATP + 5-amino-1-(5-fosfo-D-ribozil)imidazol-4-karboksilat + L-aspartat ADP + fosfat + (S)-2-[5-amino-1-(5-fosfo-D-ribozil)imidazole-4-karboksamido]sukcinat
Ovaj enzim učestvuje u purinskoj biosintezi.
- ↑ Lukens, L.N. and Buchanan, J.M. (1959). „Biosynthesis of purines. XXIV. The enzymatic synthesis of 5-amino-1-ribosyl-4-imidazolecarboxylic acid 5′-phosphate from 5-amino-1-ribosylimidazole 5′-phosphate and carbon dioxide”. J. Biol. Chem. 234: 1799-1805. PMID 13672967.
- ↑ Parker, J. (1984). „Identification of the purC gene product of Escherichia coli”. J. Bacteriol. 157: 712-717. PMID 6365889.
- ↑ Ebbole, D.J. and Zalkin, H. (1987). „Cloning and characterization of a 12-gene cluster from Bacillus subtilis encoding nine enzymes for de novo purine nucleotide synthesis”. J. Biol. Chem. 262: 8274-8287. PMID 3036807.
- ↑ Chen, Z.D., Dixon, J.E. and Zalkin, H. (1990). „Cloning of a chicken liver cDNA encoding 5-aminoimidazole ribonucleotide carboxylase and 5-aminoimidazole-4-N-succinocarboxamide ribonucleotide synthetase by functional complementation of Escherichia coli pur mutants”. Proc. Natl. Acad. Sci. USA 87: 3097-3101. PMID 1691501.
- ↑ O'Donnell, A.F., Tiong, S., Nash, D. and Clark, D.V. (2000). „The Drosophila melanogaster ade5 gene encodes a bifunctional enzyme for two steps in the de novo purine synthesis pathway”. Genetics 154: 1239-1253. PMID 10757766.
- ↑ Nelson, S.W., Binkowski, D.J., Honzatko, R.B. and Fromm, H.J. (2005). „Mechanism of action of Escherichia coli phosphoribosylaminoimidazolesuccinocarboxamide synthetase”. Biochemistry 44: 766-774. PMID 15641804.