Periplasmic binding domain of ATP-binding cassette transporter-like systems that belong to the type I periplasmic binding fold protein superfamily. Periplasmic binding domain of ATP-binding cassette transporter-like systems that belong to the type I periplasmic binding fold protein superfamily. They are mostly present in archaea and eubacteria, and are primarily involved in scavenging solutes from the environment. ABC-type transporters couple ATP hydrolysis with the uptake and efflux of a wide range of substrates across bacterial membranes, including amino acids, peptides, lipids and sterols, and various drugs. These systems are comprised of transmembrane domains, nucleotide binding domains, and in most bacterial uptake systems, periplasmic binding proteins (PBPs) which transfer the ligand to the extracellular gate of the transmembrane domains. These PBPs bind their substrates selectively and with high affinity. Members of this group include ABC-type Leucine-Isoleucine-Valine-Binding Proteins (LIVBP), which are homologous to the aliphatic amidase transcriptional repressor, AmiC, of Pseudomonas aeruginosa. The uncharacterized periplasmic components of various ABC-type transport systems are included in this group.

Type I periplasmic binding domain of uncharacterized extracellular ligand-binding proteins. The type I periplasmic binding domain of uncharacterized extracellular ligand-binding proteins, some of which contain a conserved catalytic serine/threonine protein kinase (STKc) domain in the N-terminal region. Members of this group are sequence-similar to the branched-chain amino acid ABC transporter leucine-isoleucine-valine-binding protein (LIVBP); their ligand specificity has not been determined experimentally, however.

ABC-type branched-chain amino acid transport systems, periplasmic component [Amino acid transport and metabolism]

Periplasmic binding protein. This family includes a diverse range of periplasmic binding proteins.

Type I periplasmic ligand-binding domain of uncharacterized ABC (ATPase Binding Cassette)-type active transport systems that are predicted to be involved in uptake of amino acids, peptides, or inorganic ions. This subgroup includes the type I periplasmic ligand-binding domain of uncharacterized ABC (ATPase Binding Cassette)-type active transport systems that are predicted to be involved in uptake of amino acids, peptides, or inorganic ions. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine/isoleucine/valine binding protein (LIVBP); however its ligand specificity has not been determined experimentally.