Bacterial microcompartment shell protein PduA

UniProtKB accession:  P0A1C7

Grouped By:  Matching UniProtKB accession

UniProtKB description:  One of the major shell proteins of the bacterial microcompartment (BMC) dedicated to 1,2-propanediol (1,2-PD) degradation (PubMed:11844753, PubMed:21239588) (Probable). At least one of PduA or PduJ is required for BMC assembly; it must be encoded as the first gene in the pdu operon (PubMed:33227310, PubMed:27561553). Not required for structural integrity of BMCs, it is required to mitigate propionaldehyde toxicity (PubMed:21239588). Controls diffusion of 1,2-PD into and propionaldehyde out of the BMC shell; residue 40 is particularly important for pore permeability (PubMed:28585808, PubMed:25713376, PubMed:27561553) (Probable). Overexpression of this protein leads to aberrant filaments that extend the length of the cell, cross the cleavage furrow and impair division. The filaments form nanotubes with a hollow center (PubMed:11844753, PubMed:33227310). The isolated BMC shell component protein ratio for J:A:B':B:K:T:U is approximately 15:10:7:6:1:1:2 (PubMed:12923081). Edge residues (particularly Lys-26) are important for function and assembly of the BMC, and influence array formation by hexamers (PubMed:24747050). Interaction with PduA allows encapsulation of at least PduP in BMCs (PubMed:22927404). Probably also targets PduD to the BMC (Probable). PduA is probably the hub for binding multiple enzymes to the interior of the BMC; modeling suggests PduC, PduD, PduE, PduG, PduL and PduP are targeted to PduA (Probable).