Phosphoribulokinase-like (PRK-like) is a family of proteins similar to phosphoribulokinase (PRK), the enzyme involved in the Benson-Calvin cycle in chloroplasts or photosynthetic prokaryotes. PRK catalyzes the phosphorylation of D-ribulose 5-phosphate to form D-ribulose 1, 5-biphosphate, using ATP and NADPH produced by the primary reactions of photosynthesis.
Comment:GxxxxGK[S/T], signature p-loop motif, also known as Walker A motif, present in various triphosphate nucleotide binding proteins. The Lys residue within the motif plays a major role in the phosphoryl transfer.
Jiyao W et al.(2023). "The conserved domain database in 2023.",