Bifunctional coenzyme A synthase (CoA synthase) Structure Main: Difference between revisions
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Component of nucleoside analog prodrugs (AraC, gemcitabine & ddC). | Component of nucleoside analog prodrugs (AraC, gemcitabine & ddC). | ||
''Uridine-Cystidine Kinase'' | ''Uridine-Cystidine Kinase:'' | ||
Catalyses phosphorylation of uridine & cystidine. | Catalyses phosphorylation of uridine & cystidine. | ||
Upon cystidine binding UCK becomes strictly specific to pyramidine ribnucleotides. | Upon cystidine binding UCK becomes strictly specific to pyramidine ribnucleotides. |
Revision as of 06:01, 8 May 2007
Highly Structurally Related Proteins:
Thymidylate Kinase: Nucleoside monophosphate kinase. Catalyses reversible phosphorylation transfer between ATP & TMP > ADP & TDP. Activates Anti HIV prodrugs.
Shikimate Kinase: Target for nontoxic antimicrobial agents, herbicides and parasite drugs. Absent in mammals. Catalyses reaction of phosphoryltransfer from ATP to shikimic acid.
Adenylate Kinase: Nucleoside monophosphate kinase. Essential for bacterial survival. AMP(bd) domain close to core of structure. Low catalytic activity compared to eukaryotic kinases (10 fold slower).
Dephospho-COA Kinase: Uses ATP as phosphate donor in phosphorylation of 3-hydroxy group of ribose (final stages of biosynthesis). ATP binds in p-loop (as it does in other kinases). COA binding site located at join of al 3 domains.
UMP/CMP kinase: Supplies precursors for nucleic acid synthesis. Catalyses UMP,CMP & dCMP into diphosphate form. Component of nucleoside analog prodrugs (AraC, gemcitabine & ddC).
Uridine-Cystidine Kinase: Catalyses phosphorylation of uridine & cystidine. Upon cystidine binding UCK becomes strictly specific to pyramidine ribnucleotides.