AAK_UMPK-MosAB: This CD includes the alpha and beta subunits of the Mo storage protein (MosA and MosB) which are related to uridine monophosphate kinase (UMPK) enzymes that catalyze the phosphorylation of UMP by ATP, yielding UDP, and playing a key role in pyrimidine nucleotide biosynthesis. The Mo storage protein from the nitrogen-fixing bacterium, Azotobacter vinelandii, is characterized as an alpha4-beta4 octamer containing a polynuclear molybdenum-oxide cluster which is ATP-dependent to bind Mo and pH-dependent to release Mo. These and related bacterial sequences in this CD are members of the Amino Acid Kinase Superfamily (AAK).
Jiyao W et al.(2023). "The conserved domain database in 2023.",