May play a role in the spatial distribution of the bacterial microcompartment (BMC) dedicated to 1,2-PD degradation, perhaps being involved in cytoskeleton dynamics; might bind GTP (Probable). This subunit is directly targeted to the BMC (PubMed:20417607). Expression of a cosmid containing the full 21-gene pdu operon in E.coli allows E.coli to grow on 1,2-propanediol (1,2-PD) with the appearance of bacterial microcompartments (BMC) in its cytoplasm. The 1,2-PD-specific bacterial microcompartment (BMC) concentrates low levels of 1,2-PD catabolic enzymes, concentrates volatile reaction intermediates thus enhancing pathway flux and keeps the level of toxic, mutagenic propionaldehyde low. Polyol metabolism; 1,2-propanediol degradation. Interacts with PduU, probably via the PduU beta-barrel which is predicted by modeling to be on the exterior of the BMC. Probably found on the exterior of the BMC. The N-terminus is required for targeting to the BMC; 42 residues target GFP to the BMC, although 98 residues give better targeting. Can be used to target proteins to the BMC (tested with GFP). Belongs to the EutP/PduV family.