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dimerization/docking (D/D) domain found in adenylate kinase isoenzyme 5 (AK5) and similar proteins AK5 (EC 2.7.4.3/EC 2.7.4.6), also called ATP-AMP transphosphorylase 5, acts as a nucleoside monophosphate (NMP) kinase that catalyzes the reversible transfer of the terminal phosphate group between nucleoside triphosphates and monophosphates. It is active on AMP and dAMP with ATP as a donor. When GTP is used as phosphate donor, the enzyme phosphorylates AMP, CMP, and to a small extent dCMP. It also displays broad nucleoside diphosphate kinase activity. AK5 contains an N-terminal domain that shows high sequence similarity to the dimerization/docking (D/D) domains of regulatory subunit of cAMP-dependent protein kinase (PKA) and protein DPY-30/SDC1. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",