cd03229: ABC_Class3 (this model, PSSM-Id:72988 is obsolete and has been replaced by 213196)
This class is comprised of all BPD (Binding Protein Dependent) systems that are largely represented in archaea and eubacteria and are primarily involved in scavenging solutes from the environment. ABC transporters are a large family of proteins involved in the transport of a wide variety of different compounds, like sugars, ions, peptides, and more complex organic molecules. The nucleotide binding domain shows the highest similarity between all members of the 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.