Involved in 1,2-propanediol (1,2-PD) utilization within the bacterial microcompartment (BMC) dedicated to 1,2-PD degradation by catalyzing the conversion of propanoyl-CoA to propanoyl-phosphate. CoA is regenerated within the pdu BMC (for use by PduP) via this enzyme, although there must also be cofactor transport across the BMC (PubMed:26959993). Directly targeted to the BMC (By similarity). Phosphate is probably the first substrate to bind in the forward direction. CoA is probably the first substrate to bind in the reverse direction, and might bind to the enzyme as the BMC assembles, ensuring cofactor encapsulation (Probable). phosphate + propanoyl-CoA = CoA + propanoyl phosphate There are 2 Zn(2+) ions per monomer; Zn(2+) and CoA bind inbetween the 2 domains in each monomer. Polyol metabolism; 1,2-propanediol degradation. Full-length protein forms large oligomers. Homodimer, when purified in the absence of the encapsulation peptide (EP, residues 1-47). The EP may influence oligomerization. Probably located inside the BMC shell. Formed by 2 beta-barrels, each is capped on both ends by short alpha-helices. Belongs to the PduL family.