ATP-binding cassette domain of the drug resistance transporter and related proteins, subfamily A
This family of ATP-binding proteins belongs to a multi-subunit transporter involved in drug resistance (BcrA and DrrA), nodulation, lipid transport, and lantibiotic immunity. In bacteria and archaea, these transporters usually include an ATP-binding protein and one or two integral membrane proteins. Eukaryotic systems of the ABCA subfamily display ABC domains that are quite similar to this family. The ATP-binding domain shows the highest similarity between all members of the ABC transporter family. ABC transporters are a subset of nucleotide hydrolases that contain a signature motif, Q-loop, and H-loop/switch region, in addition to, the Walker A motif/P-loop and Walker B motif commonly found in a number of ATP- and GTP-binding and hydrolyzing proteins.
Jiyao W et al.(2023). "The conserved domain database in 2023.",