Involved in the biosynthesis of the unique nickel-containing tetrapyrrole coenzyme F430, the prosthetic group of methyl-coenzyme M reductase (MCR), which plays a key role in methanogenesis and anaerobic methane oxidation. Catalyzes the activation the g-propionate side chain of 15,17(3)-seco-F430-17(3)-acid (seco-F430) for intramolecular C-C bond formation to yield the carbocyclic F ring of coenzyme F430. 15,17(3)-seco-F430-17(3)-acid + ATP = ADP + coenzyme F430 + phosphate Belongs to the MurCDEF family.