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AAA family ATPase
This family of domains contain only a P-loop motif, that is characteristic of the AAA superfamily. Many of the proteins in this family are just short fragments so there is no Walker B motif. (from Pfam)
ribose 1,5-bisphosphokinase
ribose 1,5-bisphosphokinase catalyzes the phosphorylation of ribose 1,5-bisphosphate to 5-phospho-D-ribosyl alpha-1-diphosphate (PRPP)
phosphonate metabolism protein/1,5-bisphosphokinase (PRPP-forming) PhnN
Members of this family resemble PhnN of phosphonate utilization operons, where different such operons confer the ability to use somewhat different profiles of C-P bond-containing compounds (see PMID:15231805), including phosphites as well as phosphonates. PhnN in E. coli shows considerable homology to guanylate kinases (EC 2.7.4.8), and has actually been shown to act as a ribose 1,5-bisphosphokinase (PRPP forming). This suggests an analogous kinase reaction for phosphonate metabolism, converting 5-phosphoalpha-1-(methylphosphono)ribose to methylphosphono-PRPP.
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